Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

These are .SYS files modified by TDSS malware to aid its routines. The patched codes are responsible for executing the malware during startup and inject its component files into running processes. It also has rootkit capabilities, which enables it to hide its processes and files from the user.

  TECHNICAL DETAILS

File Size: Varies
File Type: SYS
Memory Resident: Yes
Initial Samples Received Date: 23 Jul 2010

NOTES:
This is the Trend Micro detection for .SYS files that are modified by TDSS malware to aid its routines. The patched codes are responsible for executing the malware during startup and inject its component files into running processes. It also has rootkit capabilities, which enables it to hide its processes and files from the user.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 7.988.01
FIRST VSAPI PATTERN DATE: 19 Apr 2011
VSAPI OPR PATTERN File: 7.989.00
VSAPI OPR PATTERN Date: 20 Apr 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to clean files detected as PE_TDSS.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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