M December 01, 2008 Virus Alert - WORM_KOLABC.HS
WORM_KOLABC.HS
   
Virus type: Worm
Destructive:  No
Aliases: No Alias Found
Pattern file needed: 5.681.00
Scan engine needed: 8.500
Overall risk rating: Low
Reported infections: Low
Damage Potential: Low
Distribution Potential: Low

Solution :

Identifying the Malware Files

  1. Scan your computer with your Trend Micro antivirus product.
  2. Note the path and file name of all files detected as WORM_KOLABC.HS.

Trend Micro customers need to download the latest virus pattern file before scanning their computer. Other users can use Housecall, the Trend Micro online threat scanner.

Deleting Malware Files using Windows Startup Disk
On Windows 98 and ME systems

This procedure allows the computer to restart by using the Windows Startup Disk.

  1. Click Start>Settings>Control Panel.
  2. In the Control Panel, double-click Add/Remove Programs. Click on the Startup Disk tab.
  3. Insert a working floppy disk and the Windows installation CD, and then click the Create Disk button to create the Startup Disk. Note that this deletes the contents of the floppy disk.
  4. Restart the system with the Startup Disk.
  5. In the command prompt, locate the folder where the malware files are detected.
  6. In the folder, type the following and press Enter:
    del {Malware file name}
  7. Restart the system.

Deleting Malware Files using Recovery Console
On Windows NT, 2000, XP, and Server 2003 systems

This procedure allows the computer to restart by using the Windows installation CD.

  1. Insert your Windows Installation CD in your CD-rom.
  2. Press the restart button of your computer.
  3. When prompted, press any key to boot from the CD.
  4. When prompted on the Main Menu, type r to enter the recovery console.
    (Note: On Windows 2000, after pressing r, type c to choose the Recovery Console in the repair options screen.)
  5. When prompted, type your administrator password to log on.
  6. Once logged in, type the drive that contains Windows in the command prompt that appears, then press Enter.
  7. Type the drive that contains Windows, then press Enter.
  8. Type the following, then press Enter:
    del {Malware path and file name}
  9. Repeat the above procedure for all files detected earlier.
  10. Type exit to restart the system.

Removing Autostart Keys/Entries from the Registry

This solution deletes/modifies registry keys/entries added/modified by this malware. Before performing the steps below, make sure you know how to back up the registry and how to restore it if a problem occurs. Refer to this Microsoft article for more information about modifying your computer's registry.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE\SYSTEM>CurrentControlSet>Services
  3. Still in the left panel, locate and delete the key:
    NET Runtime Optimization Service v2.1.41329_X86
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Active Setup>
    Installed Components
  5. Still in the left panel, locate and delete the key:
    {103L3C30-C3B3-4130-9363-E59E1375PERM}
  6. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>
    CurrentVersion>Run
  7. In the right panel, locate and delete the following entries:
    • NvidMediaCenter = "%Program Files%\Common Files\System\wmsncs.exe"
    • Spool Driver Service = "%System%\spool\drivers\wmsncs.exe"
    • Wins Service = "%System%\wins\wmsncs.exe"
    • Wmsncs Service = "%Windows%\Fonts\wmsncs.exe"
    (Note: %Program Files% is the default Program Files folder, usually C:\Program Files. %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. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Removing Other Malware Entries from the Registry

  1. Still in Registry Editor, in the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Tracing>FWCFG
  2. In the right panel, locate and delete the entry:
    • ConsoleTracingMask = "0"
    • EnableConsoleTracing = "0"
    • EnableFileTracing = "0"
    • FileTracingMask = "0"
  3. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>MRT
  4. In the right panel, locate and delete the entry:
    DontReportInfectionInformation = "1"
  5. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>Windows NT>
    Windows File Protection
  6. In the right panel, locate and delete the entry:
    • SFCScan = "0"
    • SFCDisable = "ffffff9d"
  7. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>Windows>
    WindowsUpdate
  8. In the right panel, locate and delete the entry:
    DoNotAllowXPSP2 = "1"
  9. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>WindowsFirewall>
    DomainProfile
  10. In the right panel, locate and delete the entry:
    EnableFirewall = "0"
  11. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>WindowsFirewall>
    StandardProfile
  12. In the right panel, locate and delete the entry:
    EnableFirewall = "0"
  13. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control
  14. In the right panel, locate and delete the entry:
    WaitToKillServiceT = "5000"
  15. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>AFD>
    Parameters
  16. In the right panel, locate and delete the entry:
    DisableRawSecurity = "1"
  17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>lanmanserver>
    parameters
  18. In the right panel, locate and delete the entry:
    • AutoShareServer = "0"
    • AutoShareWks = "0"
  19. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>lanmanworkstation>
    parameters
  20. In the right panel, locate and delete the entry:
    • AutoShareServer = "0"
    • AutoShareWks = "0"
  21. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>SharedAccess>
    Parameters>FirewallPolicy>DomainProfile
  22. In the right panel, locate and delete the entry:
    • DisableNotifications = "1"
    • DoNotAllowExceptions = "0"
    • EnableFirewall = "0"
  23. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>SharedAccess>
    Parameters>FirewallPolicy>DomainProfile>AuthorizedApplications>List
  24. In the right panel, locate and delete the entry:
    wmsncs.exe = "wmsncs.exe:*:Enabled:SYSTEM"
  25. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>SharedAccess>
    Parameters>FirewallPolicy>StandardProfile
  26. In the right panel, locate and delete the entry:
    • DisableNotifications = "1"
    • DoNotAllowExceptions = "0"
  27. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>SharedAccess>
    Parameters>FirewallPolicy>StandardProfile>AuthorizedApplications>List
  28. In the right panel, locate and delete the entry:
    wmsncs.exe = "wmsncs.exe:*:Enabled:SYSTEM"
  29. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>Tcpip>
    Parameters
  30. In the right panel, locate and delete the entry:
    • AllowUserRawAccess = "1"
    • DefaultTTL = "40"
    • EnablePMTUBHDetect = "0"
    • EnablePMTUDiscovery = "1"
    • GlobalMaxTcpWindowSize = "0003ebc0"
    • LargeBufferSize = "000c8000"
    • MaxUserPort = "0000fffe"
    • SackOpts = "1"
    • StrictTimeWaitSeqCheck = "1"
    • Tcp1323Opts = "1"
    • TcpMaxDupAcks = "2"
    • TcpTimedWaitDelay = "0000001e"
    • TcpWindowSize = "0003ebc0"
  31. In the left panel, double-click the following:
    HKEY_USERS>.DEFAULT>Software>Microsoft>Windows>
    CurrentVersion>Internet Settings
  32. In the right panel, locate and delete the entry:
    • MaxConnectionsPer1_0Server = "0000fffe"
    • MaxConnectionsPerServer = "0000fffe"

Restoring Registry Entries

  1. Still in Registry Editor, in the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Ole
  2. In the right panel, locate the entry:
    EnableDCOM = "N"
  3. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Y
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Security Center
  5. In the right panel, locate the entry:
    AntiVirusDisableNotify = "1"
  6. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  7. In the right panel, locate the entry:
    AntiVirusOverride = "1"
  8. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  9. In the right panel, locate the entry:
    FirewallDisableNotify = "1"
  10. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  11. In the right panel, locate the entry:
    FirewallOverride = "1"
  12. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  13. In the right panel, locate the entry:
    UpdatesDisableNotify = "1"
  14. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  15. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>
    Winlogon
  16. In the right panel, locate the entry:
    Shell = "Explorer.exe %Windows%\Fonts\wmsncs.exe"
  17. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Explorer.exe
  18. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Lsa
  19. In the right panel, locate the entry:
    restrictanonymous = "1"
  20. Right-click on the value name and choose Modify. Change the value data of this entry to:
    0
  21. Close Registry Editor.

Important Windows ME/XP Cleaning Instructions

Users running Windows ME and XP must disable System Restore to allow full scanning of infected computers.

Users running other Windows versions can proceed with the succeeding solution set(s).

Running Trend Micro Antivirus

If you are currently running in safe mode, please restart your computer normally before performing the following solution.

Scan your computer with Trend Micro antivirus and delete files detected as WORM_KOLABC.HS. To do this, Trend Micro customers must download the latest virus pattern file and scan their computer. Other Internet users can use HouseCall, the Trend Micro online virus scanner.

Trend Micro offers best-of-breed antivirus and content-security solutions for your corporate network or home PC.


For additional information about this threat, see Technical Details.