Analysis by: Marfel Tiamzon
 PLATFORM:

Windows 98, 2K, XP, 2K3, VISTA where Ichitaro software 2009 is installed

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware/spyware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 146,832 bytes
File Type: DOC
Memory Resident: No
Initial Samples Received Date: 15 Sep 2010

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware/spyware or malicious users.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Note :

Other Details

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

  • Exploits an unknown vulnerability in Ichitaro, a popular word processing application in Japan that uses a .JTD extension name, wherein it executes a shell code that lets it drop and execute the following file:
    • %usertemp%\TarOOFCV.exe – to be detected as TROJ_DROPPER.QVA
  • Routines of the dropped file detected as TROJ_DROPPER.QVA are also exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 8.900

Step 1

For Windows ME and XP 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_TARODRP.SM

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_TARODRP.SM 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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