TROJ_PIDIEF.WK
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
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
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
Autostart Technique
This Trojan drops the following files:
- %User Temp%\svchost.exe - detected as TROJ_DROPPR.SA
(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 unknown vulnerabilities in the following software to drop malicious files:
- Adobe Vulnerability CVE-2009-4324
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:
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4324
SOLUTION
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
Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.WK. 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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