Trojan.Win32.VIGORF.WLDF

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 creates the following folders:

• %User Temp%\d86dbf464dbbdf0d22dd8bbd848b4028

(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).)

Autostart Technique

This Trojan registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\d86dbf464dbbdf0d22dd8bbd848b4028
ImagePath = "{random characters}"

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\d86dbf464dbbdf0d22dd8bbd848b4028
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\d86dbf464dbbdf0d22dd8bbd848b4028
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\d86dbf464dbbdf0d22dd8bbd848b4028
Start = "3"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\d86dbf464dbbdf0d22dd8bbd848b4028\d86dbf464dbbdf0d22dd8bbd848b4028.sys

(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).)

This report is generated via an automated analysis system.