TROJ_DLOADE.SMC2
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan may be dropped by other malware.
It does not have any propagation routine.
It does not have any backdoor routine.
It accesses websites to download files. This action allows this malware to possibly add other malware on the affected computer. It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
It does not have any information-stealing capability.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
Arrival Details
This Trojan may be dropped by the following malware:
Installation
This Trojan drops and executes the following files:
- %User Profile%\Applications\Microsoft\msviewer.exe - (when user is not Administrator) detected as TROJ_DLOADE.SMC2
- %Program Files%\Windows NT\Accessories\Microsoft\msviewer.exe - (when user is Administrator) detected as TROJ_DLOADE.SMC2
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
It creates the following folders:
- %Program Files%\Windows NT\Accessories\Microsoft
- %User Profile%\Applications\Microsoft
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Autostart Technique
This Trojan drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:
- %User Startup%\Windows Message.lnk (Windows XP and lower versions) ← shortcut to its modified drop copy
- %Start Menu%\Programs\Startup\Windows Message.lnk (Windows Vista and higher versions) ← shortcut to its modified drop copy
(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.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.)
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan accesses websites to download the following files:
- http://{BLOCKED}g.twinkes.net/otete2/css/topblack.php
It saves the files it downloads using the following names:
- %User Temp%\msupdata.exe
- %User Temp%\{random}.tmp ← this will be created if unable to create 'msupdata.exe'
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Information Theft
This Trojan does not have any information-stealing capability.
Other Details
This Trojan deletes the initially executed copy of itself
NOTES:
It does not have rootkit capabilities.
It does not exploit any vulnerability.
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Remove the malware/grayware file that dropped/downloaded TROJ_DLOADE.SMC2. (Note: Please skip this step if the threat(s) listed below have already been removed.)
Step 4
Restart in Safe Mode
Step 5
Search and delete these folders
- %Program Files%\Windows NT\Accessories\Microsoft
- %User Profile%\Applications\Microsoft
Step 6
Search and delete this file
- %User Startup%\Windows Message.lnk (Windows XP and lower versions)
- %Start Menu%\Programs\Startup\Windows Message.lnk (Windows Vista and higher versions)
- %User Temp%\msupdata.exe
- %User Temp%\{random}.tmp
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLOADE.SMC2. 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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