Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows 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 from remote sites.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: Varies
File Type: PE
Memory Resident: No
Initial Samples Received Date: 26 Feb 2011
Payload: Connects to URLs/Ips

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

  • TROJ_INJECT.SMD

It may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.59.112:28100/gdfscd1
  • http://{BLOCKED}.{BLOCKED}.59.112:28100/nbgfvsd
  • http://{BLOCKED}.{BLOCKED}.4.96:17847/nrgrewe
  • http://{BLOCKED}.{BLOCKED}.4.96:17847/vrfewwe

Installation

This Trojan drops the following copies of itself into the affected system:

  • %Startup%\{random file name}.exe

It is injected into the following processes running in memory:

  • Explorer.exe

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}she.com
  • {BLOCKED}jui.com
  • {BLOCKED}ee.com
  • {BLOCKED}dh.com

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.859.00
VSAPI OPR PATTERN Date: 25 Feb 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_LETHIC.SMC

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_LETHIC.SMC. 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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