WORM_SOVFO.Q
Worm:Win32/Sovfo.A (Microsoft); Trojan-FEKK!DD2C3A96DEC9 (McAfee); Downloader (Symantec); Trojan.Win32.Cosmu.cdqg (Kaspersky); Mal/VB-ALT (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Generic34.BXEX (AVG)
Windows
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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 worm 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 worm drops the following copies of itself into the affected system:
- {Drive Letter}\Hot fotos.exe
- {Drive Letter}\My Musik(2013).exe
- %User Profile%\{random filename}.exe
(Note: %User Profile% is a user's profile folder, where it usually is C:\Documents and Settings\{user name} on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name} 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 System Modifications
This worm adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
String\Strings
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
String\Strings
String = "1"
Dropping Routine
This worm drops the following files:
- %User Startup%\{random filename}.lnk
- %User Temp%\~DF{random}.tmp
(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.. %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.)
Other Details
This worm connects to the following possibly malicious URL:
- http://www.{BLOCKED}ronproject.site11.com/post.php?
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
Restart in Safe Mode
Step 4
Delete this registry key
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\VB and VBA Program Settings\String
- Strings
Step 5
Search and delete this file
- %User Startup%\{random filename}.lnk
- %User Temp%\~DF{random}.tmp
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SOVFO.Q. 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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