W32.SillyFDC.BBX
W32.SillyFDC.BBX is a worm that propagates by creating a duplicate copy of itself to removable USB and unsecured network mapped drives. W32.SillyFDC.BBX also drops more malware and tries to execute additional threats on the compromised machine. Other than that, this worm may also disable security applications and certain system software.
Also Detected As:
W32/Sohana-CX (Sophos), Troj/Agent-MRP (Sophos), W32/Sohana-DC (Sophos), W32/Autorun-BNX (Sophos), W32/Tiotua-DF (Sophos)
Damage Level: Low
Systems Affected: Windows 9x, 2000, XP, Windows Vista
Characteristics
W32.SillyFDC.BBX runs on every Windows boot-up by adding the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\”Msn Messsenger” = “%System%\regsvr.exe”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\”svchost Agent” = “%System%\28463\svchost.exe”
Distribution
- The worm propagates locally by copying itself to shared drives as New Folder.exe and regsvr.exe.
- It also creates a copy of itself to removable drives and USB devices as New Folder.exe, jxcw.exe and regsvr.exe
- On each infected drives, W32.SillyFDC.BBX drops the file autorun.inf so that it automatically runs when the drive is accessed.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"Msn Messsenger" = "%System%\regsvr.exe" HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"svchost Agent" = "%System%\28463\svchost.exe" HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\"%CurrentFolder%\[ORIGINAL THREAT FILE NAME].exe" = "%CurrentFolder%\[ORIGINAL THREAT FILE NAME].exe:*:Enabled:ipsec" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\"DisableRegistryTools" = "1" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\"DisableTaskMgr" = "0" HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\"EnableLUA" = "0" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\WorkgroupCrawler\Shares\"shared" = "\\[PATH TO SHARED NETWORK FOLDER]\New Folder .exe" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NofolderOptions" = "0"Associated Files and Folders:
%System%\regsvr.exe %System%\svchost .exe %Windir%\regsvr.exe %System%\28463\svchost.001 %System%\28463\svchost.exe %System%\setting.ini %System%\setup.ini %Windir%\Tasks\At1.job
How to Remove W32.SillyFDC.BBX
1. Temporarily Disable System Restore (Windows Me/XP). [how to]
2. Open your antivirus application and update the virus definition file. This method ensures that your antivirus program can detect even newer variants of W32.SillyFDC.BBX
3. Start Windows in Safe Mode with Networking.
- From a power-off state, turn on the computer and press F8 on your keyboard repeatedly.
- Your computer will display Windows Advanced Boot Options menu. Please select Safe Mode with Networking.
- The system will now boot Windows and loads only necessary drivers and files.
4. Open your antivirus program and run a full system scan. After the scan, delete all infected items. If unable, better place them in quarantine. Once the scan is complete, please proceed with the next step.
Online Virus Scanner:
Another way to remove W32.SillyFDC.BBX without the need to install additional antivirus application is to perform a thorough scan with free online virus scanner that can be found on websites of legitimate anti-virus and security provider.
5. Go to Online Virus Scanner list and run a virus scan. This may require plug-ins, add-on or Activex object, please install if you want to proceed with scan.
6. After completing the necessary download, your system is now ready for online virus scanning.
7. Select an option in which you can thoroughly scan the computer to make sure that it will find and delete entirely all infections not detected on previous scan.
8. Remove or delete all detected items.
9. When scanning is finished you may now restart the computer in normal mode.