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TROJ_PIDIEF.ZAC

April 28, 2010
 Analysis by: JocelynR
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Trend Micro has flagged this Trojan as noteworthy due to the multiple samples of this malware received from multiple, independent sources, including customer reports and internal sources. This indicates that this malware poses a high risk to users due to the increased possibility of infection.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

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

  TECHNICAL DETAILS

File Size:

250,469 bytes

File Type:

PDF

Memory Resident:

Yes

Initial Samples Received Date:

26 Apr 2010

Arrival Details

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

Dropping Routine

This Trojan drops the following files:

Other Details

Based on analysis of the codes, it has the following capabilities:

  • Calls on an embedded VBScript detected as VBS_EMOTI.A and prompts the user to save and execute the file
  • Uses the /Launch functionality of Adobe Reader and Acrobat to execute embedded files in the PDF document

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

7.130.11

VSAPI OPR PATTERN Date:

27 Apr 2010

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.ZAC

    •  VBS_EMOTI.A

Step 3

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


*Note: 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.


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