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TROJ_DLOADR.LFR

October 09, 2012
 Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 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:

68,096 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 adds the following registry keys to install itself as a Browser Helper Object (BHO):

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{10E1725C-7237-41A9-954A-04DCCB1FD16C}

Other System Modifications

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

HKEY_CLASSES_ROOT\BhoPlugin.EyeOnIE

HKEY_CLASSES_ROOT\BhoPlugin.EyeOnIE.1

HKEY_CLASSES_ROOT\CLSID\{10E1725C-7237-41A9-954A-04DCCB1FD16C}

HKEY_CLASSES_ROOT\Interface\{49859A6F-2284-4F06-9F8E-BFE56B35BA09}

HKEY_CLASSES_ROOT\TypeLib\{3C8BF053-0A65-46FE-A757-2187BD66EF34}

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.856.03

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_DLOADR.LFR

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_DLOADR.LFR. 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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