TROJ_PIDIEF.LID

April 16, 2013

PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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.

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:

149,928 bytes

File Type:

PDF

Memory Resident:

Initial Samples Received Date:

10 Apr 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 the following component file(s):

%System Root%\A.exe - Detected as TSPY_INJECT.A

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It drops the following non-malicious file:

%System Root%\a.pdf

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Dropping Routine

This Trojan takes advantage of the following software vulnerabilities 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.

NOTES:
It opens the file A.PDF to trick users into thinking that it is a normal .PDF file.

SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

8.900.06

FIRST VSAPI PATTERN DATE:

10 Apr 2012

VSAPI OPR PATTERN File:

8.901.00

VSAPI OPR PATTERN Date:

11 Apr 2012

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove malware/grayware files dropped/downloaded by TROJ_PIDIEF.LID

TSPY_SVINJECT.A

Step 3

Search and delete these files

[ Learn More ]

There may be some 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.

%System Root%\a.exe

Step 4

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