W2KM_BARTALEX.XYUU

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.

Dropping Routine

This Trojan drops the following files:

• %User Temp%\{random number}.vbs
• %User Temp%\{random number}.bat

(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:

• http://www.{BLOCKED}rstylistas.com/administrator/components/com_joomlaupdate/777763172631572.txt
• http://web251.login-37.{BLOCKED}ar.ch/administrator/components/com_joomlaupdate/777763172631572.txt
• http://www.{BLOCKED}rstylistas.com/administrator/components/com_joomlaupdate/rara.txt
• http://web251.login-37.{BLOCKED}ar.ch/administrator/components/com_joomlaupdate/rara.txt