TROJ_PIDIEF.KMKI

October 09, 2012
 Analysis by: Roland Marco Dela Paz
 ALIASES:

Symantec: Trojan.Pidief; Sophos: Mal/PDFJs-Z

 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

Upon execution, it opens the non-malicious dropped .PDF document, Israel could still strike Iran.pdf, in order to hide its malicious routines from the user.

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be hosted on a website and run when a user accesses the said website.

It takes advantage of software vulnerabilities in certain software to drop malicious files. It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

131,727 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

20 May 2011

Payload:

Drops files

Arrival Details

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

It may be hosted on a website and run when a user accesses the said website.

Installation

This Trojan drops the following non-malicious file:

  • %User Temp%\Israel could still strike Iran.pdf

(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 drops the following files:

  • %User Temp%\svchost.tmp - detected as BKDR_AGENT.TIT

(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.)

It takes advantage of unknown vulnerabilities in the following software to drop malicious files:

  • CVE-2010-2883

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Other Details

More information on this vulnerability can be found below:

NOTES:
Upon execution, it opens the non-malicious dropped .PDF document, Israel could still strike Iran.pdf, in order to hide its malicious routines from the user.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.166.17

FIRST VSAPI PATTERN DATE:

20 May 2011

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 files dropped/downloaded by TROJ_PIDIEF.KMKI

    • BKDR_AGENT.TIT

Step 3

Search and delete this file

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
  • %User Temp%\Israel could still strike Iran.pdf

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.KMKI. 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 5

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. http://www.adobe.com/support/security/advisories/apsa10-02.html


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