Analysis by: Lord Alfred Remorin
ALIASES:

Exploit:SWF/CVE-2012-1535 (Microsoft), Exploit-CVE2012-1535 (McAfee), Trojan.Mdropper (Symantec)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email

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

  TECHNICAL DETAILS

File Size: 298,496 bytes
File Type: DOC
Memory Resident: Yes
Initial Samples Received Date: 17 Aug 2012
Payload: Drops files

Arrival Details

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

Installation

This Trojan drops and executes the following files:

Dropping Routine

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

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.328.09
FIRST VSAPI PATTERN DATE: 17 Aug 2012
VSAPI OPR PATTERN File: 9.329.00
VSAPI OPR PATTERN Date: 17 Aug 2012

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/grayware files dropped/downloaded by TROJ_MDROPR.KTS

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_MDROPR.KTS. 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 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.



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