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TROJ_MDROP.WVB

April 22, 2011
 Analysis by: Michael Cabel
 ALIASES:

Microsoft: Exploit:SWF/CVE-2011-0611.A

 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 specially crafted .DOC file takes advantage of a vulnerability in certain versions of Adobe Flash Player to drop an embedded .SWF file detected by Trend Micro as SWF_DROPPER.A.

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

  TECHNICAL DETAILS

File Size:

186,896 bytes

File Type:

DOC

Memory Resident:

No

Initial Samples Received Date:

18 Apr 2011

Payload:

Drops files

Arrival Details

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

Other Details

More information on this vulnerability can be found below:

  • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0611
  • http://www.adobe.com/support/security/bulletins/apsb11-07.html

NOTES:

This specially crafted .DOC file takes advantage of a vulnerability in certain versions of Adobe Flash Player to drop an embedded .SWF file detected by Trend Micro as SWF_DROPPER.A.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.987.50

FIRST VSAPI PATTERN DATE:

18 Apr 2011

Step 1

For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by TROJ_MDROP.WVB

    • SWF_DROPPER.A

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_MDROP.WVB 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.

NOTES:


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