TROJ_DLOAD.BECI
Trojan Horse (Symantec), Win32.AdWare (Ikarus)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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
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
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
- 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.
- 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.
- 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
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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