Analysis by: Erika Bianca Mendoza
 PLATFORM:

Windows 2000, Windows XP, Windows 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 may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size: 4,096 bytes
File Type: DLL
Initial Samples Received Date: 19 Oct 2011

Arrival Details

This Trojan may be dropped by other malware.

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

NOTES:
Upon execution, it attempts to run any of the following files:

  • [drive]\vsntd.exe - detected by Trend Micro as WORM_KOLAB.DKO
  • bootcfh.exe
  • cmdl33.exe
  • ahuj.exe
  • eudcediu.exe
  • drwtsn33.exe

As a result, the routines of the said file are also exhibited in the system.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.508.05
FIRST VSAPI PATTERN DATE: 19 Oct 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_STARTER.D

     WORM_KOLAB.DKO

Step 3

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.
  • bootcfh.exe
  • cmdl33.exe
  • ahuj.exe
  • eudcediu.exe
  • drwtsn33.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_STARTER.D. 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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