Sirefef/Mal/Z-Acess AB virus cannot be removed

billt4ng · Jan 19, 2013

Hi,
So just today, I clicked the link to some website and suddenly my Sophos antivirus started going crazy and it kept saying that it detected malware and quarantined it. Also, my windows defender popped up as well, saying that it detected a threat. After I closed down my internet explorer, I went into Sophos and it said that my computer had a Mal/Z-Access AB, and in the quarantine list it said it was clearing the virus, but there was no further option to manually remove it or anything. Then after a while, the virus simply disappeared off the list. I then scanned my computer with Sophos, and as soon as it got to some file located in C:\$RECYCLE.BIN\S-1-5-21-3585982430-245995388-556436578-1001\$b11e9bfb6e94b280e4dc96d28e6dc673\n another rapid burst of notifications started, saying that Sophos had placed a threat in quarantine. It was called the same thing, and once again there was no option to remove it. Then the scan simply froze and stopped scanning.

Then I tried opening windows defender, which said that my computer was infected with a Trojan Win64/Sirefef.AE, and I clicked on the remove button. Now it's been "applying my actions" for about an hour even though it said it would take a few seconds, and the green progress bar is simply frozen.

I have a two month old Windows 8 64 bit computer. Does anyone know what might be wrong or how I can remove this/these viruses?

Kestrel13! · Jan 20, 2013

Welcome to the Malware Removal Forum.

Please read ALL of this message including the notes before doing anything.

Pleases follow the instructions in the below link:

READ & RUN ME FIRST. Malware Removal Guide

and attach the requested logs when you finish these instructions.

**** If something does not run, write down the info to explain to us later but keep on going. ****

Do not assume that because one step does not work that they all will not. MGtools will frequently run even when all other tools will not.

After completing the READ & RUN ME and attaching your logs, make sure that you tell us what problems still remain ( if any still do )!

Helpful Notes:

If you run into problems trying to run the READ & RUN ME or any of the scans in normal boot mode, you can run the steps in safe boot mode but make sure you tell us what you did later when you post logs. See the below if you do not know how to boot in safe mode:

Starting your computer in Safe mode

If you have problems downloading on the problem PC, download the tools and the manual updates for SUPERAntiSpyware and Malwarebytes ( links are given in the READ & RUN ME) onto another PC and then burn to a CD. Then copy them to the problem PC. You will have to skip getting updates if (and only if) your internet connection does not work. Yes you could use a flash drive too but flash drives are writeable and infections can spread to them.

If you cannot seem to login to an infected user account, try using a different user account (if you have one) in either normal or safe boot mode and running only SUPERAntiSpyware and Malwarebytes while logged into this other user account. Then reboot and see if you can log into the problem user account. If you can then run SUPERAntiSpyware, Malwarebytes, ComboFix and MGtools on the infected account as requested in the instructions.

To avoid additional delay in getting a response, it is strongly advised that after completing the READ & RUN ME you also read this sticky:

Don't Bump! It Only Hurts You!!!

Any additional post is a bump which will add more delay. Once you attach the logs, your thread will be in the work queue and as stated our system works the oldest threads FIRST.

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Sirefef/Mal/Z-Acess AB virus cannot be removed

billt4ng Private E-2

Kestrel13! Super Malware Fighter - Major Dilemma Staff Member