W2KM_SHIZ.MJSX

November 02, 2015
 Analysis by: Sammy Chua
 Modified by: RonJay Kristoffer Caragay
 ALIASES:

VBA/TrojanDownloader.Agent.AFW (ESET-NOD32); Macro.Trojan-Downloader.Agent.FV (GData); Heur.MSWord.Downloader.d (Tencent);

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via email, Downloaded from the Internet

This Trojan arrives as attachment to mass-mailed email messages. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

86,016 bytes

Memory Resident:

No

Initial Samples Received Date:

27 Oct 2015

Payload:

Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan arrives as attachment to mass-mailed email messages.

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

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}nd-uua.no/76436/d243ty.exe
  • http://{BLOCKED}nord-2.com/~cn2/76436/d243ty.exe
  • http://{BLOCKED}buildinggroup.com/~guest/76436/d243ty.exe
  • http://blogabp.{BLOCKED}0.pl/76436/d243ty.exe

It saves the files it downloads using the following names:

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This is the Trend Micro detection for Microsoft Word documents that are compromised through the insertion of a malicious macro.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.112.02

FIRST VSAPI PATTERN DATE:

27 Oct 2015

VSAPI OPR PATTERN File:

12.113.00

VSAPI OPR PATTERN Date:

28 Oct 2015

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove the malware/grayware file dropped/downloaded by W2KM_SHIZ.MJSX. (Note: Please skip this step if the threat(s) listed below have already been removed.)

Step 4

Search and delete this file

[ Learn More ]
There may be some 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.  
  • %User Temp%\drawhor4.exe

Step 5

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]

Step 6

Scan your computer with your Trend Micro product to delete files detected as W2KM_SHIZ.MJSX. 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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