Skip to content
1-888-762-8736(M-F 8:00am-5:00pm CST)
1-877-218-7353(M-F 8:00am-5:00pm CST)
href="http://www.trendmicro.com/us/enterprise/index.html" id="ENT-overview-test2" title="SEE ALL ENTERPRISE SOLUTIONS">Enterprise Overview
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
This Trojan drops the following non-malicious files:
It adds the following mutexes to ensure that only one of its copies runs at any one time:
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory ManagementClearPageFileAtShutdown = "1"
(Note: The default value data of the said registry entry is 0.)
This Trojan searches for files with the following extension names and overwrites these files with its code:
This Trojan terminates the following services if found on the affected system:
The overwritten files are detected as HTML_DFACE.A. This is the detection for the webpage displayed notifying the user that their systems are infected by this malware.
The dropped non-malicious files are used by HTML_DFACE.A to display its full contents. These files are dropped in each directory where a file is overwritten.
The overwritten files can not be recovered unless there is a backup.
It corrupts the MBR by writing garbage code taken from the Interrupt Vector Table and forces the boot to enter an infinite loop.
Restore your system's Master Boot Record (MBR)
To restore your system's Master Boot Record (MBR):
• On Windows 2000, XP, and Server 2003:
• On Windows Vista and 7:
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Restore this modified registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
To restore the registry value this malware/grayware modified:
Search and delete these files
To delete malware/grayware files:
Scan your computer with your Trend Micro product to delete files detected as TROJ_KILLMBR.DF. 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.
Connect with us on
| | | |