Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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 is a component of other malware.

  TECHNICAL DETAILS

File Size: 6,912 bytes
File Type: SYS
Memory Resident: No
Initial Samples Received Date: 22 Sep 2011

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 is a component of other malware.

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • %Program Files%\AVG\AVG10\avgwdsvc.exe
  • %Program Files%\AVG\AVG10\avgchsvx.exe
  • %Program Files%\AVG\AVG10\avgtray.exe
  • %Program Files%\AVG\AVG10\avgrsx.exe
  • %Program Files%\AVG\AVG10\avgcsrvx.exe
  • %Program Files%\AVG\AVG10\Identity Protection\Agent\Bin\AVGIDSAgent.exe
  • %Program Files%\AVG\AVG10\Identity Protection\Agent\Bin\AVGIDSMonitor.exe
  • %Program Files%\AVG\AVG10\avgnsx.exe
  • %Program Files%\Alwil Software\Avast5\AvastUI.exe
  • %Program Files%\Alwil Software\Avast5\AvastSvc.exe
  • %Program Files%\Avira\AntiVir Desktop\avscan.exe
  • %Program Files%\AVG\AVG8\avgupd.exe
  • %Program Files%\Alwil Software\Avast4\VisthUpd.exe
  • %Program Files%\Avira\AntiVir Desktop\avupgsvc.exe
  • %Program Files%\Alwil Software\Avast5\AvastUI.exe
  • %Program Files%\ESET\ESET NOD32 Antivirus\updater.dll

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.458.15
FIRST VSAPI PATTERN DATE: 22 Sep 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 delete files detected as TROJ_KILLAV.AFQ. 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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