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polymorphic webshells
ASP Python PHP
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README.md

poly

A python script that generates polymorphic webshells.
Use it to encode your favourite shell and make it practically undetectable.
If no shell is specified with the -p arguement, the default shell in the /shells directory is used.

Supported webshells

Webshell
.php
.asp ( vbs )
.aspx ( c# )

Supported encoders

Encoding
b64 base64 encoded text with random strings in random intervals
ord ord() each character plus a random number
rnd each character is mapped to another random character
rot text is divided by a random number of rows, then rotated 90 degrees clockwise

C99 shell uploaded on virustotal

Encoding Detection rate
none 41 / 56
b64 0 / 52
ord 0 / 54
rnd 0 / 56
rot 0 / 56

Requirements :
Python 2.7

Notice :
With asp shells it is recommended to use the default shell. ( /shells/shell.asp )
Encoded aspx shells may not work on some servers.
Php works pretty much with every shell, on every server.
Rnd and rot encodings are not binary safe. ( may produce unprintable characters )

Disclaimer :
This tool is made for educational and research purposes.
Don't be evil..

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