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Rootkit.filter-gen [1]


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9 replies to this topic

#1 mejim

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Posted 04 September 2008 - 10:20 AM

My Superantispyware program finds "Rootkit.Filter-Gen [1]" and presents it to me as a problem. I then delete it but it just shows up again. Any suggestions on how to get rid of it?

Thank you.

Jim

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#2 iisjman07

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Posted 04 September 2008 - 10:44 AM

Can you give us some more info, like the file name, location, etc... If SUPERantispyware makes a log file please post it.

#3 mejim

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Posted 04 September 2008 - 02:20 PM

Okay, sorry. This is right off the Superantispyware screen.

C:\WINDOWS\SYSTEM32\DRIVERS\SZSMOMCA.DAT

#4 quietman7

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Posted 04 September 2008 - 03:23 PM

If the file keeps returning after you delete it, then there may be more malware on your system which is protecting it.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.
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#5 mejim

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Posted 05 September 2008 - 01:39 PM

Here is that log you wanted. Thanks for helping me, BTW. Also, I have scanned and then rebooted and the trojan is still there on the next scan.
_____________________________________________________________________________________________________

Malwarebytes' Anti-Malware 1.26
Database version: 1116
Windows 5.1.2600 Service Pack 2

9/5/2008 10:32:17 AM
mbam-log-2008-09-05 (10-32-17).txt

Scan type: Quick Scan
Objects scanned: 46599
Time elapsed: 4 minute(s), 53 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 3
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bf (Trojan.Agent) -> Delete on reboot.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bk (Trojan.Agent) -> Delete on reboot.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\iu (Trojan.Agent) -> Delete on reboot.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Edited by mejim, 05 September 2008 - 01:40 PM.


#6 quietman7

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Posted 05 September 2008 - 06:52 PM

Your MBAM log indicates some files will be deleted on reboot. If MBAM encounters a file that is difficult to remove, you need to restart the computer so the malware can be fully removed. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. If you have not rebooted, make sure you do this. When done, rescan again with MBAM and check all items found for removal. Then click the Logs tab and copy/paste the contents of the new report in your next reply. If you did reboot, then rescan again anyway and post a new log.

MBAM has a built-in FileAssassin feature for removing stubborn malware files.
  • Go to the "More Tools" tab and click on the "Run Tool" button
  • Browse to the location of the file(s) to remove using the drop down box next to "Look in:" at the top.
    • C:\Windows\system32\DRIVERS\SZSMOMCA.DAT <- this file
  • When you find the file(s), click "Open".
  • You will be prompted with a message warning: This file will be permanently deleted. Are you sure you want to continue?. Click Yes.
  • If removal did not require a reboot, you will receive a message indicating the file was deleted successfully, however, I recommend you reboot anyway.

Caution: Be careful what you delete. FileAssassin is a powerful program, designed to move highly persistent files. Using it incorrectly could lead to serious problems with your operating system.


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#7 mejim

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Posted 06 September 2008 - 09:55 AM

I think your recommend to use "more tools" got it. If you agree with me that it is gone , I want to thank you guys very much :thumbsup: . Here is the log after using more tools:


Malwarebytes' Anti-Malware 1.26
Database version: 1116
Windows 5.1.2600 Service Pack 2

9/6/2008 6:48:53 AM
mbam-log-2008-09-06 (06-48-53).txt

Scan type: Quick Scan
Objects scanned: 46844
Time elapsed: 4 minute(s), 50 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#8 quietman7

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Posted 06 September 2008 - 10:10 AM

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok"
  • Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" Tab.
  • Click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.

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#9 mejim

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Posted 06 September 2008 - 01:56 PM

Quietman7,

Thank you so much for the help.

Not sure where this trojan came from but I suspect maybe a fake free update from Microsoft that I got from an email. I opened the email that was going to redirect me the the microsoft site and the next thing you know I get several splash screens that snuck by my pop-up blocker. Avast immeditately popped up but I think the damage was done already. Just my guess.

Love this site, Bleepingcomputer btw. It has saved me more than once.

Jim

#10 quietman7

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Posted 06 September 2008 - 04:10 PM

You're welcome.

Tips to protect yourself against malware and reduce the potential for re-infection:
• "Simple and easy ways to keep your computer safe".
• "How did I get infected?, With steps so it does not happen again!".
• "Best Practices - Internet Safety for 2008".
• "Hardening Windows Security - Part 1 & Part 2".
• "IE Recommended Minimal Security Settings" - "How to Secure Your Web Browser".

• Avoid gaming sites, underground web pages, pirated software sites, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.
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