Analysis by: Michael Cabel
ALIASES:

Symantec: W32.Ackantta!Dr; Microsoft : Trojan:Win32/Meredrop

 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 drops component files detected as WORM_PROLACO.EK.

This Trojan executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 808,960 bytes
File Type: PE
Memory Resident: No
Initial Samples Received Date: 02 Dec 2010
Payload: Drops files

Installation

This Trojan drops the following component file(s):

  • %User Temp%\IXP000.TMP\document.exe - detected as WORM_PROLACO.EK

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It drops the following non-malicious file:

  • %User Temp%\IXP000.TMP\PCView.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Dropping Routine

This Trojan executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 07.670.04
VSAPI PATTERN Date: 02 Dec 2010
VSAPI PATTERN Date: 12/2/2010 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

Remove malware files dropped/downloaded by TROJ_CHIFRAX.DJ

     WORM_PROLACO.EK

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_CHIFRAX.DJ. 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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