Analysis by: Janus Agcaoili
ALIASES:

Win32/Exploit.CVE-2012-0158.ACB (ESET-NOD32), Troj/RTFExp-CO (Sophos)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

It takes advantage of certain vulnerabilities. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 8,717,464 bytes
File Type: RTF
Memory Resident: No
Initial Samples Received Date: 12 Jul 2016

Arrival Details

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

Other Details

This Trojan attempts to access the following websites to download files, which are possibly malicious:

  • https://a.{BLOCKED}f.cat/nrgwjg.exe

It takes advantage of the following vulnerabilities:

  • MSCOMCTL.OCX RCE Vulnerability (CVE-2012-0158)

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.646.04
FIRST VSAPI PATTERN DATE: 12 Jul 2016
VSAPI OPR PATTERN File: 12.647.00
VSAPI OPR PATTERN Date: 13 Jul 2016

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE20120158.MESA. 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 3

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.


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