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TROJ_FAKESYS.OV

October 22, 2012
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Trojan:Win32/FakeSysdef (Microsoft), Trojan.ADH (Symantec), Mal/FakeAV-SF (Sophos), TR/FakeSysdef.A.2322 (Antivir), Trojan.Win32.FakeAV (Ikarus)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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 executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

353280 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

11 Oct 2012

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 executes then deletes itself afterward.

NOTES:

This malware tries to create a window for its GUI (graphical user interface) but fails to do so due to coding errors.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.462.02

FIRST VSAPI PATTERN DATE:

11 Oct 2012

VSAPI OPR PATTERN File:

9.463.00

VSAPI OPR PATTERN Date:

12 Oct 2012

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_FAKESYS.OV. 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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