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Virus Suspected; AV disabled & MBAM crashes


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7 replies to this topic

#1 2wet2rain

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Posted 07 November 2011 - 07:10 PM

Hello,
I believe our desktop has a virus due to symptoms, but can't be sure. First hint was Microsoft Security Essentials showing as disabled upon bootup and not being able to restart the service. Uninstalled MSE and installed Avast with same result; shields disabled and can't be started. Ran Malwarebytes (MBAM), but it crashed after a few seconds. (MBAM ran to completion two weeks ago.)

Downloaded RKill from another computer and transferred via USB key. Ran RKill; it completed but showed no processes stopped. Tried running MBAM from Start Menu, but got error "Windows can't access the specified device, path, or file. You may not have appropriate permission to access the item." Was logged into the administrator account.

Uninstalled MBAM and reloaded it using file newly downloaded from another PC and transferred via CD. MBAM started, updated, but window disappeared a few seconds after scan started. Tried to re-run by clicking on mbam.exe file in /program files/... folder but got the "windows can't access..." error. Copied the mbam.exe file from other PC to a CD. copied mbam.exe to desktop & renamed it.
- Copied renamed file to MBAM program files folder and clicked on it to run it.
- MBAM started but then disappeared after 3-10 seconds (scanned a max of ~100 files).
- I went to MBAM program folder, clicked on the renamed executable: got same windows error.
- repeat about 7 times with different renamings (e.g., changed both prefix & suffix).
- most tried in normal mode but also tried running MBAM in safe mode; same failures. ran RKILL after every reboot and before trying to run MBAM.

Appreciate any help that can be provided. Had our other desktop crash with apparent hard disk failure this same weekend so would be nice to get one working.

Compaq Presario SR5350 w/Windows Vista

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#2 Computer wiz45

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Posted 10 November 2011 - 05:47 PM

With the information you provided. You need help form the malware removal team. Follow this guideHere .

#3 2wet2rain

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Posted 10 November 2011 - 07:52 PM

Thank you. I didn't want to just presume that I was infected. I've done some of the prep steps, but will now do the logging and open a post on the malware forum. Thanks again.

#4 boopme

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Posted 10 November 2011 - 08:42 PM

Hello, try booting into ssafe mode with netwoking. Udate MBAM, then run RKill and immediately MBAM.

You may need this..,.
This infection changes settings on your computer so that when you launch an executable, a file ending with .exe, it will instead launch the infection rather than the desired program. To fix this we must first download a Registry file that will fix these changes. From a clean computer, please download the following file and save it to a removable media such as a CD/DVD, external Drive, or USB flash drive.

FixNCR.reg

insert the removable device into the infected computer and open the folder the drive letter associated with it. You should now see the FixNCR.reg file that you had downloaded onto it. Double-click on the FixNCR.reg file to fix the Registry on your infected computer.
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#5 2wet2rain

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Posted 10 November 2011 - 11:52 PM

Hi boopme,

Ok. I was just about to post this to the malware forum per computerwiz45 when I saw your reply.

I downloaded FixNCR.reg to another computer and then transfered it via thumb drive. I ran it as you directed and the computer said changes to registry had been copied from FixNCR.reg. I then rebooted into SAFE Mode, started and updated MBAM (named "1234mb56.scr"), ran RKill, and then started full MBAM scan. The scan got past enumerating registry items but then died about 5 seconds into scanning files.

(Yesterday, I had also downloaded SuperAntiSpyware and copied it over to the infected computer. Tried several times with random names, sometimes with running Rkill just before. Got similar results as when tried to run MBAM. The scan ran for a few seconds but then shut down. Same "windows can access..." error if I tried to restart with same SAS executable.

In prep for posting this in the Malware forum, I have downloaded, transferred, and run DDS (after disabling CD emulation). I have the output files. I also downloaded and transferred GMER. However, when I tried to run it, it shut down after a few seconds in the configuration screen.

Appreciate any help you can provide. Regards.

David

#6 boopme

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Posted 11 November 2011 - 11:43 AM

Ok, looks like you need to post there.. Post the DDS and metion GMer and others will not run.
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#7 2wet2rain

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Posted 11 November 2011 - 12:24 PM

Thanks. Will post over on Malware forum. :thumbup2:

#8 Orange Blossom

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Posted 12 November 2011 - 01:40 PM

Hello,

Now that you have posted a log here: http://www.bleepingcomputer.com/forums/topic427418.html 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 MRT Team member, nor should you ask for help elsewhere. Doing so can result in system changes which may not show in the log you already posted. Further, any modifications you make on your own may cause confusion for the helper assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

From this point on the MRT 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 MRT Team members are EXTREMELY busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT make another reply until it has been responded to by a member of the MRT 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 MRT Team member is already assisting you and not open the thread to respond.

Please be patient. It may take several days to get a response but your log will be reviewed and answered as soon as possible. I advise checking your topic once a day for responses as the e-mail notification system is unreliable.

If HelpBot replies to your topic, PLEASE follow Step One so it will report your topic to the team members.

To avoid confusion, I am closing this topic. Good luck with your log.

Orange Blossom :cherry:
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.

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