TROJ_UPATRE.PRL

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 deletes itself after execution.

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 copies of itself into the affected system and executes them:

• %User Temp%\Dummys.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.)

Dropping Routine

This Trojan drops the following files:

• %User Temp%\file6845.txt
• %User Temp%\view01.pdf
• %User Temp%\{random file name}.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 URL(s) to get the affected system's IP address:

• http://checkip.dyndns.org/

It connects to the following possibly malicious URL:

• http://{BLOCKED}.{BLOCKED}.141.87:13949/0904us12/{HostName}/0/{OS Version}-{Service Pack}/0/{Data}
• http://{BLOCKED}.{BLOCKED}.141.87:13949/0904us12/{HostName}/41/1/{Service Pack}/0/{Data}
• http://{BLOCKED}-blaumar.com/pages/xen2.docx
• http://{BLOCKED}dtools.com.co/wp-includes/css/xen2.docx

It deletes itself after execution.