Analysis by: Rhena Inocencio
 Modified by: Christopher Daniel So
ALIASES:

Win32/Korplug.A trojan (Nod32), Trojan Horse (Symantec)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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 arrives as a component bundled with malware/grayware packages.

  TECHNICAL DETAILS

File Size: 20,480 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 13 Sep 2012
Payload: Executes files

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.

It arrives as a component bundled with malware/grayware packages.

NOTES:

This Trojan, whose file name is NvSmartMax.dll, is loaded by a non-malicious legitimate file named Nv.exe. It then loads the file {malware path}\Nv.mp3, detected by Trend Micro as TROJ_PLUGX.SME, and executes the code contained in it. As a result, malicious routines of the loaded file are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.392.02
FIRST VSAPI PATTERN DATE: 13 Sep 2012
VSAPI OPR PATTERN File: 9.393.00
VSAPI OPR PATTERN Date: 14 Sep 2012

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_PLUGX.ME

Step 3

Scan your computer with your Trend Micro product and note files detected as TROJ_PLUGX.ME

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Search and delete the file detected as TROJ_PLUGX.ME

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_PLUGX.ME. 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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