TROJ_TRAPWOT.C
Rogue:Win32/Trapwot (Microsoft); RDN/Generic.tfr!ek (McAfee); Trojan.Win32.Yakes.kfif (Kaspersky); Troj/Agent-AMGO (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Win32/Cryptor (AVG)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
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
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.
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Direct3D\MostRecentApplication
Name = "{malware file name}"
(Note: The default value data of the said registry entry is vfp6.exe.)
Dropping Routine
This Trojan drops the following files:
- %Application Data%\kwenwchind.png
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}171.236
This report is generated via an automated analysis system.
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
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Direct3D\MostRecentApplication
- From: Name = "{malware file name}"
To: Name = ""vfp6.exe""
- From: Name = "{malware file name}"
Step 3
Search and delete this file
- %Application Data%\kwenwchind.png
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_TRAPWOT.C. 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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