Analysis by: Jennifer Gumban
ALIASES:

EXP/CVE-2012-0158 (Antivir)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email, Downloaded from the Internet

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be unknowingly downloaded by a user while visiting malicious websites.

It downloads a file from a certain URL then renames it before storing it in the affected system. As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 7,616,063 bytes
File Type: RTF
Memory Resident: No
Initial Samples Received Date: 27 May 2015
Payload: Downloads files

Arrival Details

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

It may be unknowingly downloaded by a user while visiting malicious websites.

Dropping Routine

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

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

Download Routine

This Trojan downloads files from the following URLs then renames them before storage in the affected system:

  • http://{BLOCKED}portali.net/camo/sync/hrypt6E94B40.exe

As of this writing, the said sites are inaccessible.

Other Details

More information on this vulnerability can be found below:

  SOLUTION

Minimum Scan Engine: 9.750
FIRST VSAPI PATTERN FILE: 11.706.05
FIRST VSAPI PATTERN DATE: 26 May 2015
VSAPI OPR PATTERN File: 11.707.00
VSAPI OPR PATTERN Date: 27 May 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

Scan your computer with your Trend Micro product to delete files detected as TROJ_ARTIEF.YYUI. 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 these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.  


Did this description help? Tell us how we did.