Analysis by: Jimelle Monteser
ALIASES:

W32/WinLnk.A!tr (Fortinet), LNK/Agent.AE trojan (NOD32)

 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:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

It is a component of other malware.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 499 bytes
File Type: LNK
Initial Samples Received Date: 01 Oct 2013

Arrival Details

This Trojan may be dropped by other malware.

Installation

This Trojan is a component of other malware.

Other Details

This Trojan opens the following files:

  • {malware path}\porn.exe

It requires its main component to successfully perform its intended routine.

NOTES:
This is a Trend Micro detection for specially crafted .LNK files that are used to execute dropped copies of KELIHOS malware family once this shortcut is accessed.

As a result, the routines of the main component file is exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 10.320.04
FIRST VSAPI PATTERN DATE: 05 Oct 2013
VSAPI OPR PATTERN File: 10.321.00
VSAPI OPR PATTERN Date: 06 Oct 2013

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

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