Analysis by: Jeffrey Bernardino
 PLATFORM:

Windows 2000, XP, 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 uses social engineering methods to lure users into performing certain actions that may, directly or indirectly, cause malicious routines to be performed. Specifically, it uses the name Trend Micro to let users download and install a malicious package that purports to come from a legitimate antivirus company.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: 6,400 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 02 Sep 2010
Payload: Executes malicious files

Installation

This Trojan injects codes into the following process(es):

  • EXPLORER.EXE

Other Details

Based on analysis of the codes, it has the following capabilities:

  • Executes when ofcservice, an OSCE service, is automatically executed at system startup
  • Executes the following files added by TROJ_FAKETM.C:
    • tmupdg.exe - detected as TROJ_FAKETM.B
    • tmconfg.exe - detected as TROJ_DROPPER.JAS

This is the Trend Micro detection for:

  • Files targeting the Trend Micro OfficeScan Corporate Edition (OSCE) Server application

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 7.440.05
FIRST VSAPI PATTERN DATE: 06 Sep 2010
VSAPI OPR PATTERN File: 7.441.00
VSAPI OPR PATTERN Date: 06 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

Remove malware files dropped/downloaded by TROJ_FAKETM.A

    • TROJ_FAKETM.B
    • TROJ_DROPPER.JAS
    • TROJ_FAKETM.C

Step 3

Identify and delete files detected as TROJ_FAKETM.A using the Recovery Console

[ Learn More ]

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKETM.A. 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.

Related Malware