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TROJ_FAKEAV.UUNF

October 09, 2012
 Analysis by: Karl Dominguez
 ALIASES:

Mal/FakeAV-LS (Sophos) ; FakeAlert-SysDef.b (McAfee)

 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 may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.

It executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

477,184 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Jun 2011

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This Trojan executes then deletes itself afterward.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}also.org/404.php?type=stats&affid=525&subid=01&iruns

It saves the files it downloads using the following names:

  • %User Temp%\{random characters}.tmp - TROJ_FAKEAV.UUNE

(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, XP, and Server 2003.)

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.212.09

FIRST VSAPI PATTERN DATE:

10 Jun 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

Remove malware files dropped/downloaded by TROJ_FAKEAV.UUNF

     TROJ_FAKEAV.UUNE

Step 3

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

NOTES:
Recommendations:

  • Enable firewall to protect against web threats
  • Block malware related websites
  • Avoid visiting un-trusted sites that may redirect or download malware into the system
  • Be aware of social engineering attacks to be safe
  • Always keep pattern files/engine up-to-date


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