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TROJ_MDROPPER.CD

October 09, 2012
 Analysis by: Lord Alfred Remorin
 ALIASES:

Exploit:Win32/CVE-2012-0158 (Microsoft), Trojan.Mdropper (Symantec), Exp/20120158-A (Sophos)

 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


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

  TECHNICAL DETAILS

File Size:

186,864 bytes

File Type:

RTF

Memory Resident:

Yes

Initial Samples Received Date:

15 Aug 2012

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:

  • %User Temp%\WINWORD.EXE - detected as TSPY_FLAME.M

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Dropping Routine

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

NOTES:

Upon execution, this Trojan drops and opens a document file to hide its malicious routines from the user.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.326.08

FIRST VSAPI PATTERN DATE:

15 Aug 2012

VSAPI OPR PATTERN File:

9.327.00

VSAPI OPR PATTERN Date:

15 Aug 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you to allow full scanning of your computer.

Step 2

Remove the malware/grayware file that dropped/downloaded TROJ_MDROPPER.CD


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