Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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.

  TECHNICAL DETAILS

File Size: 88,064 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 22 Mar 2012

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.

Autostart Technique

This Trojan registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{99ED9674-A61B-4E2D-B842-9189001A92AF}

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CLASSES_ROOT\Internet.IEManager

HKEY_CLASSES_ROOT\Internet.IEManager.1

HKEY_CLASSES_ROOT\CLSID\{99ED9674-A61B-4E2D-B842-9189001A92AF}

HKEY_CLASSES_ROOT\Interface\{0F506679-4F72-4940-9C32-3B72DA932104}

HKEY_CLASSES_ROOT\TypeLib\{FE1A617F-55F4-4CB4-8210-354897F8C6FF}

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.856.02
FIRST VSAPI PATTERN DATE: 22 Mar 2012
VSAPI OPR PATTERN File: 8.857.00
VSAPI OPR PATTERN Date: 23 Mar 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

Scan your computer with your Trend Micro product and note files detected as TROJ_BHO.FJE

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Delete these Browser Helper Object (BHO) registry keys

[ Learn More ]
{Malware Path and File Name}

Step 5

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