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 uses common file icons to trick a user into thinking that the files are legitimate.

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

  TECHNICAL DETAILS

File Size: 18,432 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 02 Oct 2010

Installation

This Trojan uses common file icons to trick a user into thinking that the files are legitimate.

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}9.{BLOCKED}6.143.134/outlook.exe
  • http://{BLOCKED}8.{BLOCKED}5.74.163/avpsoft_dfhljkghsdflg.exe

It saves the files it downloads using the following names:

  • %temp%\_ex-08.exe - detected as TROJ_SNIFF.AJKQ
  • %temp%\temp\_ex-68.exe - detected as TROJ_FAKEAV.WHJR

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

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.508.01
VSAPI PATTERN Date: 02 Oct 2010
VSAPI PATTERN Date: 10/2/2010 12:00:00 AM

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 these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %temp%\_ex-08.exe
  • %temp%\temp\_ex-68.exe

    • Step 3

    Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOAD.GHEQ. 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.


    Did this description help? Tell us how we did.