TROJ_DROPPR.KEN
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
TECHNICAL DETAILS
Varies
EXE
Yes
21 Sep 2010
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan drops the following copies of itself into the affected system:
- %Program Files%\\Common Files\\??.jpg
- %Program Files%\Common Files%\meisi.txt
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Dropping Routine
This Trojan drops the following files:
- %system%\ahnsy.dll - detected as BKDR_AHNSY.B
It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
SOLUTION
8.900
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_DROPPR.KEN
- In BKDR_AHNSY.B
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.KEN. 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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