Tool for obfuscating PowerShell scripts written in Go. The main objective of this program is to obfuscate PowerShell code to make its analysis and detection more difficult. The script offers 5 levels of obfuscation, from basic obfuscation to script fragmentation. This allows users to tailor the obfuscation level to their specific needs.

./psobf -h

    ██████╗ ███████╗ ██████╗ ██████╗ ███████╗
    ██╔══██╗██╔════╝██╔═══██╗██╔══██╗██╔════╝
    ██████╔╝███████╗██║   ██║██████╔╝█████╗
    ██╔═══╝ ╚════██║██║   ██║██╔══██╗██╔══╝
    ██║     ███████║╚██████╔╝██████╔╝██║
    ╚═╝     ╚══════╝ ╚═════╝ ╚═════╝ ╚═╝
    @TaurusOmar
    v.1.0                                               

Usage: ./obfuscator -i <inputFile> -o <outputFile> -level <1|2|3|4|5>
Options:
  -i string
        Name of the PowerShell script file.
  -level int
        Obfuscation level (1 to 5). (default 1)
  -o string
        Name of the output file for the obfuscated script. (default "obfuscated.ps1")

Obfuscation levels:
  1: Basic obfuscation by splitting the script into individual characters.
  2: Base64 encoding of the script.
  3: Alternative Base64 encoding with a different PowerShell decoding method.
  4: Compression and Base64 encoding of the script will be decoded and decompressed at runtime.
  5: Fragmentation of the script into multiple parts and reconstruction at runtime.

Features:

• Obfuscation Levels: Four levels of obfuscation, each more complex than the previous one.
  • Level 1 obfuscation by splitting the script into individual characters.
  • Level 2 Base64 encoding of the script.
  • Level 3 Alternative Base64 encoding with a different PowerShell decoding method.
  • Level 4 Compression and Base64 encoding of the script will be decoded and decompressed at runtime.
  • Level 5 Fragmentation of the script into multiple parts and reconstruction at runtime.
• Compression and Encoding: Level 4 includes script compression before encoding it in base64.
• Variable Obfuscation: A function was added to obfuscate the names of variables in the PowerShell script.
• Random String Generation: Random strings are generated for variable name obfuscation.

Install

go install github.com/TaurusOmar/psobf@latest

Example of Obfuscation Levels

The obfuscation levels are divided into 5 options. First, you need to have a PowerShell file that you want to obfuscate. Let's assume you have a file named script.ps1 with the following content:

Write-Host "Hello, World!"

Level 1: Basic Obfuscation

Run the script with level 1 obfuscation.

./obfuscator -i script.ps1 -o obfuscated_level1.ps1 -level 1

This will generate a file named obfuscated_level1.ps1 with the obfuscated content. The result will be a version of your script where each character is separated by commas and combined at runtime.
Result (level 1)

$obfuscated = $([char[]]("`W`,`r`,`i`,`t`,`e`,`-`,`H`,`o`,`s`,`t`,` `,`"`,`H`,`e`,`l`,`l`,`o`,`,` `,`W`,`o`,`r`,`l`,`d`,`!`,`"`") -join ''); Invoke-Expression $obfuscated

Level 2: Base64 Encoding

Run the script with level 2 obfuscation:

./obfuscator -i script.ps1 -o obfuscated_level2.ps1 -level 2

This will generate a file named obfuscated_level2.ps1 with the content encoded in base64. When executing this script, it will be decoded and run at runtime.
Result (level 2)

$obfuscated = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('V3JpdGUtSG9zdCAiSGVsbG8sIFdvcmxkISI=')); Invoke-Expression $obfuscated

Level 3: Alternative Base64 Encoding

Execute the script with level 3 obfuscation:

./obfuscator -i script.ps1 -o obfuscated_level3.ps1 -level 3

This level uses a slightly different form of base64 encoding and decoding in PowerShell, adding an additional layer of obfuscation.
Result (level 3)

$e = [System.Convert]::FromBase64String('V3JpdGUtSG9zdCAiSGVsbG8sIFdvcmxkISI='); $obfuscated = [System.Text.Encoding]::UTF8.GetString($e); Invoke-Expression $obfuscated

Level 4: Compression and Base64 Encoding

Execute the script with level 4 obfuscation:

./obfuscator -i script.ps1 -o obfuscated_level4.ps1 -level 4

This level compresses the script before encoding it in base64, making analysis more complicated. The result will be decoded and decompressed at runtime.
Result (level 4)

$compressed = 'H4sIAAAAAAAAC+NIzcnJVyjPL8pJUQQAlRmFGwwAAAA='; $bytes = [System.Convert]::FromBase64String($compressed); $stream = New-Object IO.MemoryStream(, $bytes); $decompressed = New-Object IO.Compression.GzipStream($stream, [IO.Compression.CompressionMode]::Decompress); $reader = New-Object IO.StreamReader($decompressed); $obfuscated = $reader.ReadToEnd(); Invoke-Expression $obfuscated

Level 5: Script Fragmentation

Run the script with level 5 obfuscation:

./obfuscator -i script.ps1 -o obfuscated_level5.ps1 -level 5

This level fragments the script into multiple parts and reconstructs it at runtime.
Result (level 5)

$fragments = @(
'Write-', 
'Output "', 
'Hello,', 
' Wo', 
'rld!', 
'"'
); 
$script = $fragments -join ''; 
Invoke-Expression $script

This program is provided for educational and research purposes. It should not be used for malicious activities.