TROJ_MSFAK.E
Trojan:Win32/Comitsproc (Microsoft)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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
36,974 bytes
EXE
Yes
28 Feb 2012
Downloads files
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.
Installation
This Trojan drops the following copies of itself into the affected system:
- %User Startup%\IEXPLORE.EXE
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)
Autostart Technique
This Trojan modifies the following registry entry(ies) to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
load = "{Malware Path and File Name}"
(Note: The default value data of the said registry entry is "".)
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://www1.{BLOCKED}m.onedumb.com/apc.gif
It saves the files it downloads using the following names:
- %User Temp%\IEXPLORE.EXE
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
NOTES:
As of this writing, the URL where the file can be downloaded is already inaccessible and it redirects to http://www.yahoo.co.jp. As a result, the downloaded file saved as %User Temp%\IEXPLORE.EXE is a non-malicious HTML file.
SOLUTION
9.200
8.806.04
28 Feb 2012
8.807.00
29 Feb 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
Identify and delete files detected as TROJ_MSFAK.E using the Recovery Console
Step 3
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.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows
- From: load = "{Malware Path and File Name}"
To: load = ""
- From: load = "{Malware Path and File Name}"
Step 4
Search and delete this file
- %User Temp%\IEXPLORE.EXE
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_MSFAK.E. 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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