Trojan.PS1.ASYNCRAT.A

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 executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

It terminates itself if it detects it is being run in a virtual environment.

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 Startup%\InstallationFirefox.js

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• AsyncMutex_6SI8OkPnk

It injects codes into the following process(es):

• %Windows%\Microsoft.NET\{Framework}\{Version}\InstallUtil.exe

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Backdoor Routine

This Trojan executes the following commands from a remote malicious user:

• Ping test
• Execute sent plugin

It connects to the following websites to send and receive information:

• {BLOCKED}59.ddns.net:3413

Information Theft

Upon execution of the affected application, it gathers the following information:

• Active window title
• Current file path of the malware
• Current malware version running in the machine
• Flag stating if the malware is run as admin
• HWID generated from processor count, username, computer name, OS version, and total size of the system directory
• Installed AV products
• OS information
• Time installed
• Username

Other Details

This Trojan terminates itself if it detects it is being run in a virtual environment.