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TROJ_FAKEAV.RUS

October 08, 2012
 Analysis by: Roland Marco Dela Paz
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Trojan executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

256,512 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

21 Sep 2010

Installation

This Trojan adds the following folders:

  • %system root%\Documents and Settings\All Users\Application Data\{random}

Download Routine

This Trojan saves the files it downloads using the following names:

  • %system root%\Documents and Settings\All Users\Application Data\05d5a0\MS05d_2208.exe - detected as TROJ_FAKEAV.RYQA

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan does the following:

  • It connects to the following domains to download a FAKEAV malware:
  • http://{BLOCKED}1.nartivnalbinwlentor309.net/
  • http://{BLOCKED}1.nartivnalbinwlentor309.net/

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.504.03

VSAPI PATTERN Date:

29 Sep 2010

VSAPI PATTERN Date:

9/29/2010 12:00:00 AM

FIRST VSAPI PATTERN FILE:

7.478.06

FIRST VSAPI PATTERN DATE:

21 Sep 2010

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

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
%system root%\Documents and Settings\All Users\Application Data\{random}

Step 3

Remove malware files dropped/downloaded by TROJ_FAKEAV.RUS

    TROJ_FAKEAV.RYQA

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAV.RUS. 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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