WORM_SOBER.AH
W32.Sober.X@mm (Symantec); Worm:Win32/Sober.S@mm (Microsoft); W32/Sober@MM!M681 (Mcafee); W32/Sober.AH.worm!CME-681 (Panda)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware
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
75,996 bytes
EXE
Yes
20 Jul 2009
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 and executes them:
- %Windows%\WinSecurity\csrss.exe
- %Windows%\WinSecurity\services.exe
- %Windows%\WinSecurity\smss.exe
- %Windows%\WinSecurity\socket1.ifo
- %Windows%\WinSecurity\socket2.ifo
- %Windows%\WinSecurity\socket3.ifo
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
It drops the following files:
- %Windows%\WinSecurity\mssock1.dli
- %System%\bbvmwxxf.hml
- %System%\filesms.fms
- %System%\langeinf.lin
- %System%\nonrunso.ber
- %System%\rubezahl.rub
- %System%\runstop.rst
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It creates the following folders:
- %Windows%\WinSecurity
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
_Windows = "%Windows%\WinSecurity\services.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Windows = "%Windows%\WinSecurity\services.exe"
SOLUTION
9.200
6.292.03
20 Jul 2009
6.293.00
20 Jul 2009
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
Restart in Safe Mode
Step 3
Delete this 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\CurrentVersion\Run
- _Windows = "%Windows%\WinSecurity\services.exe"
- _Windows = "%Windows%\WinSecurity\services.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Windows = "%Windows%\WinSecurity\services.exe"
- Windows = "%Windows%\WinSecurity\services.exe"
Step 4
Search and delete this folder
- %Windows%\WinSecurity
Step 5
Search and delete these files
- %System%\bbvmwxxf.hml
- %System%\filesms.fms
- %System%\langeinf.lin
- %System%\nonrunso.ber
- %System%\rubezahl.rub
- %System%\runstop.rst
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SOBER.AH. 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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