TROJ_DLOAD.BECI


 ALIASES:

Trojan Horse (Symantec), Win32.AdWare (Ikarus)

 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as a component bundled with malware/grayware packages.

It modifies the Internet Explorer Zone Settings.

It redirects browsers to certain sites.

  TECHNICAL DETAILS

File Size:

25,088 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

10 Jan 2013

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

Web Browser Home Page and Search Page Modification

This Trojan modifies the Internet Explorer Zone Settings.

Download Routine

This Trojan accesses the following websites to download files:

  • http://{ip address}/MUpdate/VersionRequest.ashx?codename={number}&version={number}&uid={value}&country={characters}&browser=IE

It downloads a possibly malicious file from a certain URL. The URL where this malware downloads the said file depends on the parameter passed on to it by its components.

Other Details

This Trojan requires the existence of the following files to properly run:

  • WindowsLiveUpdate.exe
  • sites.dat
  • config.dat
  • vinfo.dat
  • uinfo.dat
  • tcookies.dat

It redirects browsers to the following sites:

  • http://aport.ru

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.662.04

FIRST VSAPI PATTERN DATE:

18 Jan 2013

VSAPI OPR PATTERN File:

9.663.00

VSAPI OPR PATTERN Date:

18 Jan 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

Close all opened browser windows

Step 3

Identify and terminate files detected as TROJ_DLOAD.BECI

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Reset Internet security settings

[ Learn More ]

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOAD.BECI. 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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