Trojan.Python.MALPYLOADER.AA

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It connects to a website to send and receive information.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following files:

• %User Temp%\software_updater.pid → contains the process id of the child process that executes the payload

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• {malware name}.exe → a child process that executes the payload

It creates the following folders:

• %User Temp%\_MEI{5 random numbers} → contains files used for initialization for a Python application

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Backdoor Routine

This Trojan connects to the following websites to send and receive information:

• https://raw.{BLOCKED}usercontent.com/matrixkorsakov/README/main/info → content can be modified from time to time
• https://api.configuration-health.{BLOCKED}s.dev:443/keys.json
• https://api.configuration-health.{BLOCKED}s.dev:443/code.enc

As of this writing, the said sites are inaccessible.