TROJ_DLOADR.SMOM
Trojan:Win32/Rootkit.E (Microsoft); BackDoor-CEP.gen.cq (McAfee); Trojan.Koutodoor (Symantec); Trojan.Win32.Koutodoor.d (v) (Sunbelt); Gen:Variant.Koutodoor.27 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
327,744 bytes
EXE
30 Sep 2011
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 deletes the following files:
- {malware path and file name}
- %User Temp%\yzcoob.exe
- %System%\cqbdqs.bat
(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\yzcoob.exe
- %System%\lvkplvf.dll
- %System%\drivers\wksva.sys
- %System%\cqbdqs.bat
(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}6.info/t7.php
This report is generated via an automated analysis system.
SOLUTION
9.200
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
Search and delete these files
- %User Temp%\yzcoob.exe
- %System%\lvkplvf.dll
- %System%\drivers\wksva.sys
- %System%\cqbdqs.bat
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.SMOM. 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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