TROJ_ARTIEF.PRM

June 20, 2013
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Exploit:Win32/CVE-2012-0158 (Microsoft), Exp/20120158-A (Sophos), EXP/CVE-2012-0158 (Antivir), Exploit.CVE-2012-0158.Gen (Bitdefender), MSOffice/CVE20120158.fam!exploit (Fortinet)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size:

2,609,344 bytes

File Type:

DOC

Memory Resident:

No

Initial Samples Received Date:

19 Jun 2013

Arrival Details

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

Dropping Routine

This Trojan takes advantage of the following software vulnerabilities to drop malicious files:

Other Details

More information on this vulnerability can be found below:

NOTES:
Once this Trojan successfully exploits the said vulnerability, it attempts to drop and execute the following malicious file:

  • %User Temp%\dw20.EXE - detected as BKDR_INJECT.PRM

It then terminates the legitimate MS Word process WINDWORD.EXE execuate a new instance of WINWORD.EXE, to trick users into thinking that it is a normal document.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.102.03

FIRST VSAPI PATTERN DATE:

19 Jun 2013

VSAPI OPR PATTERN File:

10.103.00

VSAPI OPR PATTERN Date:

20 Jun 2013

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

Remove grayware/spyware files dropped/downloaded by TROJ_ARTIEF.PRM

    BKDR_INJECT.PRM

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_ARTIEF.PRM. 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.

Step 4

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


http://technet.microsoft.com/en-us/security/bulletin/ms12-027


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