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Bootkit TDL4 !!!!!!!!


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#1 ted3869

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Posted 22 February 2011 - 07:57 AM

I ran Combofix and it keeps saying: PhysicalDrive0 - Bootkit TDL4 was found and disinfected. No matter how may times I run Combofix the same message appears. This virus does not show up on any other programs. How do I get rid of a TDL4 Bootkit problem!!

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#2 quietman7

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Posted 22 February 2011 - 09:30 AM

As a general policy, Bleeping Computer does not offer advice on how to run ComboFix unless we asked someone to run it or if there is a problem with the computer caused by running the tool. This is because people should not be using ComboFix without being advised to do so by a trained expert (i.e. Malware Response Team) who is assisting a member deal a malware issue on that system. When issues arise due to complex malware infections, possible false detections, problems running ComboFix or with other security tools causing conflicts, experts are usually aware of them and can advise what should or should not be done while providing individual assistance. When false detections are identified, experts have access to the developer and can report them so he can investigate, confirm and make corrections. Those attempting to use ComboFix on their own do not have such information and are at risk when running the tool in an unsupervised environment.

Further, using ComboFix is only one part of the disinfection process. Preliminary scans from other tools like DDS, RSIT and GMER should be used first because they provide comprehensive logs with specific details about files, folders and registry keys which may have been modified by malware infection. Analysis of those logs allows planning an strategy for effective disinfection and a determination if using ComboFix is necessary. Please read the pinned topic ComboFix usage, Questions, Help? - Look here.

With that said, please follow these instructions: How to remove Google Redirects or the TDSS, TDL3, Alureon rootkit using TDSSKiller
  • Double-click on TDSSKiller.exe to run the tool for known TDSS variants.
    Vista/Windows 7 users right-click and select Run As Administrator.
  • When the program opens, click the Start Scan button.
  • Any objects found, will show in the Scan results - Select action for found objects and offer three options.
  • If an infected file is detected, the default action will be Cure...do not change it.

    Posted Image
  • Click Continue > Reboot now to finish the cleaning process.<- Important!!

    Posted Image
  • If 'Suspicious' objects are detected, you will be given the option to Skip or Quarantine. Skip will be the default selection. Leave it as such for now.
  • A log file named TDSSKiller_version_date_time_log.txt will be created and saved to the root directory (usually Local Disk C:).
  • Copy and paste the contents of that file in your next reply.
-- For any files detected as 'Suspicious' (except those identified as Forged to be cured after reboot) get a second opinion by submitting to Jotti's virusscan or VirusTotal. In the "File to upload & scan" box, browse to the location of the suspicious file and submit (upload) it for scanning/analysis.

Step 7 instructs you to scan your computer using Malwarebytes Anti-Malware. Don't forget to check for database definition updates through the program's interface (preferable method) before scanning.

Malwarebytes' may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you. Temporarily disable such programs or permit them to allow the changes.
  • After completing the scan, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab .
  • 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 the database version and your operating system.
  • Exit Malwarebytes' when done.
Note: If Malwarebytes' encounters a file that is difficult to remove, you will be asked to reboot your computer so it can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally will prevent Malwarebytes' from removing all the malware.
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#3 ted3869

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Posted 22 February 2011 - 09:58 AM

I ran TDSSKiller.exe and if found no problem. I ran Malwarebytes and it found no problem. However, Combofix keeps saying the computer is infected.

Edited by ted3869, 22 February 2011 - 09:59 AM.


#4 quietman7

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Posted 22 February 2011 - 10:04 AM

This issue will require further investigation. Many of the tools we use in this forum are not capable of detecting (repairing/removing) all malware variants so more advanced tools are needed to investigate. Before that can be done you will need you to create and post a DDS log for further investigation.

Please read the pinned topic titled "Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help".
  • If you cannot complete a step, then skip it and continue with the next.
  • In Step 7 there are instructions for downloading and running DDS which will create a Pseudo HJT Report as part of its log.
When you have done that, post your log in the Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT here, for assistance by the Malware Response Team Experts. A member of the Team will walk you through, step by step, on how to clean your computer. If you post your log back in this thread, the response from the Malware Response Team will be delayed because your post will have to be moved. This means it will fall in line behind any others posted that same day.

Start a new topic, give it a relevant title and post your log along with a brief description of your problem, a summary of any anti-malware tools you have used and a summary of any steps that you have performed on your own. An expert will analyze your log and reply with instructions advising you what to fix. After doing this, we would appreciate if you post a link to your log back here so we know that your getting help from the Malware Response Team.
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#5 quietman7

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Posted 22 February 2011 - 02:19 PM

I have moved (split away) your log to the Virus, Trojan, Spyware, and Malware Removal Logs forum as they are not permitted in this forum.

It is now part of your other topic posted here.

Now that your log is posted, you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a Malware Response Team member...nor should you continue to ask for help elsewhere. Doing so can result in system changes which may not show it the log you already posted. Further, any modifications you make on your own may cause confusion for the member assisting you and could complicate the malware removal process or make things worst which would extend the time it takes to clean your computer.

From this point on the Malware Response Team should be the only members that you take advice from, until they have verified your log as clean.

Please be patient. It may take a while to get a response because the Malware Response Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have posted your log and are waiting, please DO NOT "bump" your post or make another reply until it has been responded to by a member of the Malware Response Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another Malware Response Team member is already assisting you and not open the thread to respond.

To avoid confusion, I am closing this topic.
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