This code appears to be malicious and represents a **keylogger**...

This code appears to be malicious and represents a keylogger implemented in PowerShell scripting. Below is a high-level breakdown of what it does:

Key Features of the Code:

1. API Signatures Declaration:

   • It uses [DllImport] to access Windows User32.dll functions through P/Invoke to perform actions related to keyboard input:
     • GetAsyncKeyState: Detects if a key is pressed or toggled.
     • GetKeyboardState: Retrieves current keyboard state.
     • MapVirtualKey: Maps a virtual key code to a corresponding character or key code.
     • ToUnicode: Converts a virtual key code and keyboard state into the corresponding Unicode character.

2. Keylogger Functionality:

   • The script uses a while (true) loop to continuously check for keypress events using GetAsyncKeyState.
   • When a keypress is detected, it tries to convert the key into a Unicode character using ToUnicode while considering keyboard layout and state (like Caps Lock).
   • Detected characters are logged and stored in a log file at the system's temporary folder ($logPath = "$env:temp\mat-debug-6F936CD.log").

3. Scheduled Task Creation:

   • A scheduled task named "MomMonitor" is created to execute the script on system startup using schtasks. This ensures persistence, so the keylogger runs automatically after the system reboots.

4. Potential Exfiltration:

   • After every hour of logging, the script attempts to post the content of the log file ($logPath) to a remote server hosted at a (fictional, but likely malicious) domain:
     http://<computername>.malicious.12moms21.com.
   • Invoke-RestMethod is used for sending the file as part of an HTTP POST request.

5. Persistence Mechanism:

   • The script checks if the PowerShell profile script (profile.ps1) exists. If not, it writes a copy of itself to the profile script path, so it can execute every time PowerShell is launched.

6. Obfuscation and Anti-Detection Techniques:

   • Mixed-case variable names (${LogpAth}, ${KeYsTate}, etc.).
   • Use of aliases (e.g., &(schtasks), &(New-Item)).
   • Dynamic manipulation to bypass basic string-matching detection techniques.

In Summary:

The script:

• Implements a keylogger to capture user input (including sensitive information like passwords).
• Stores captured keypresses into a temporary log file.
• Transmits the log file to a remote malicious server periodically (for exfiltration).
• Sets up persistence via a scheduled task and modifies the PowerShell profile for execution at startup.
• The purpose is likely unauthorized data collection or surveillance (malware).

Caution: This script is malicious, and running it will compromise the security of the system. Do not execute or experiment with this code on any system you are not authorized to manage.