W2KM_BARTALEX.XXTE

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.

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 and executes the following files:

• %User Temp%\{random numbers}.vbs
• %User Temp%\{random numbers}.bat
• %User Temp%\{random numbers}.ps1 (For OS Version Vista and above)
• %User Temp%\8.exe

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

Other Details

This Trojan connects to the following possibly malicious URL:

• {BLOCKED}onchar.com/home/wp-includes/fonts/89172387.txt
• {BLOCKED}onchar.com/home/wp-includes/fonts/lns.txt
• {BLOCKED}ianz.com/boilerd/keys/89172387.txt
• {BLOCKED}ianz.com/boilerd/keys/lns.txt