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Tricky virus removal


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3 replies to this topic

#1 raymanvh

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Posted 09 September 2011 - 11:18 PM

Ok so here is the deal I have been dealing with this computer virus for a couple nights now on a friends computer. The problem is the infection known as win64 sirefef.b it has caused me much trouble. I will first start off telling you the procedure I have been through: First off when I got the computer it did not boot so I pulled out my hirens boot cd and booted to a mini xp OS from there I proceeded to run Superantispyware. This was able to get rid of a vast majority of things and let the computer boot up. I then proceeded to boot the computer into safe mode and I ran malewarebytes and superantispyware again fully updated on both until it knocked out about another 50 or so infections. Now I have Microsoft Security Essentials (MSE) on the computer and it detects a the virus/rootkit known as win64 sirefef.b if I allow MSE to delete this infection then the computer no longer boots and throws up a bsod saying that compsrv is missing. I however restored the system to a date before removing the infection so my OS was once again bootable and proceeded to do these steps again. The computer still has win64 sirefef.b and I preventing MSE from deleting it currently. Also just fyi the infection does not allow any windows defender programs to run and it also redirects me from any microsoft websites. If anyone has a clue on a proper fix please help me out thanks a bunch.

Edited by hamluis, 10 September 2011 - 08:26 AM.
Moved from Vista to Am I Infected.


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#2 jntkwx

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Posted 12 September 2011 - 09:41 PM

Hi raymanvh,

:welcome: to Bleeping Computer.

My name is Jason and I'll be helping you with your computer problems. You can call me by my screename jntkwx or Jason is fine.

Some things to remember while we are working together.

  • Do not run any other tool untill instructed to do so!
  • Please do not attach logs or put logs in code boxes.
  • Tell me about any problems that have occurred during the fix.
  • Tell me of any other symptoms you may be having as these can also help.
  • Do not run anything while running a fix.
  • If you don't understand a step, please ask for clarification before continuing with any future steps.

Click on the Watch Topic button and select Immediate Notification and click on proceed, this will help you to get notified faster when I have replied and make the cleaning process faster.

Note to others: The instructions here are intended for the person who began this topic. If you need help, please create your own topic in the appropriate forum.

 

:step1: Please download MiniToolBox and run it.

Checkmark following boxes:
  • Report IE Proxy Settings
  • Report FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List last 10 Event Viewer Log Errors
  • List Installed Programs
  • List Users, Partitions and Memory size
Click Go . Please put code boxes around just this entire log, like this, but without the letter x: [xcode] MiniToolBox log [/xcode]

:step2: Rerun Malwarebytes

Open Malwarebytes, click on the Update tab, and click the check for Updates button (the latest update as of this post is 7707).
  • 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 definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Full 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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

If you have trouble updating, troubleshoot Malwarebytes' Anti-Malware

:step3: Please download GMER from one of the following locations and save it to your desktop:
  • Main Mirror
    This version will download a randomly named file (Recommended)
  • Zipped Mirror
    This version will download a zip file you will need to extract first. If you use this mirror, please extract the zip file to your desktop.
  • Disconnect from the Internet and close all running programs.
  • Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver.
  • Double-click on the randomly named GMER file (i.e. n7gmo46c.exe) and allow the gmer.sys driver to load if asked.
  • Note: If you downloaded the zipped version, extract the file to its own folder such as C:\gmer and then double-click on gmer.exe.

    Posted Image
  • GMER will open to the Rootkit/Malware tab and perform an automatic quick scan when first run. (do not use the computer while the scan is in progress)
  • If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO.
  • Now click the Scan button. If you see a rootkit warning window, click OK.
  • When the scan is finished, click the Save... button to save the scan results to your Desktop. Save the file as gmer.log.
  • Click the Copy button and paste the results into your next reply.
  • Exit GMER and be sure to re-enable your anti-virus, Firewall and any other security programs you had disabled.

IMPORTANT! If for some reason GMER refuses to run, try again.
If it still fails, try to UN-check "Devices" in right pane.
If still no joy, try to run it from Safe Mode.


In your next reply, please include:
  • MiniToolBox log
  • Malwarebytes log
  • GMER log
  • How't the computer running now? Please provide a detailed description of any remaining problems, detailed word-for-word error messages that you are receiving, and/or screenshots of strange behavior.

Regards,
Jason

 

Simple and easy ways to keep your computer safe and secure on the Internet

If I am helping you and have not returned in 48 hours, please feel free to send me a PM with a link to the topic.
My help is free... however, if you wish to show appreciation and support me personally fighting against malware, please consider a donation: btn_donate_SM.gif


#3 raymanvh

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Posted 15 September 2011 - 06:06 PM

Thank you for your response and willingness to help but I have worked through this issue through my own accord and the computer fine is running once again.

#4 jntkwx

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Posted 15 September 2011 - 07:06 PM

Glad to hear that. :thumbup2:
Regards,
Jason

 

Simple and easy ways to keep your computer safe and secure on the Internet

If I am helping you and have not returned in 48 hours, please feel free to send me a PM with a link to the topic.
My help is free... however, if you wish to show appreciation and support me personally fighting against malware, please consider a donation: btn_donate_SM.gif





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