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██████╗ ███████╗ ██████╗ ██████╗ ███████╗
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@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.
