Author Topic: Virus Win32:ZAccess-EF[Tr]  (Read 8091 times)

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evcox

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Re: Virus Win32:ZAccess-EF[Tr]
« Reply #15 on: January 28, 2012, 12:02:00 AM »
No, the MS fix failed. Don't think it changed anything (Registry, dll's, etc) This "fix" did not lead to subsequent "fixes".

Do you think an "SFC" or repair install of Windows would be safe and effective. There's still some nasty on the machine evidenced by two more new infected files earlier today.

Offline essexboy

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Re: Virus Win32:ZAccess-EF[Tr]
« Reply #16 on: January 28, 2012, 12:10:40 AM »
OK lets get the big boy on it

Download and Install Combofix
 
Download ComboFix from one of the following locations:
Link 1
Link 2
 
VERY IMPORTANT !!! Save ComboFix.exe to your Desktop
 
* IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here
  • Double click on ComboFix.exe & follow the prompts.
  • Accept the disclaimer and allow to update if it asks




  • When finished, it shall produce a log for you.
  • Please include the C:\ComboFix.txt in your next reply.[/b]
Notes:
1. Do not mouse-click Combofix's window while it is running. That may cause it to stall.
2. Do not "re-run" Combofix. If you have a problem, reply back for further instructions.
3.  If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.



Please make sure you include the combo fix log in your next reply as well as describe how your computer is running now

evcox

  • Guest
Re: Virus Win32:ZAccess-EF[Tr]
« Reply #17 on: January 28, 2012, 01:08:08 AM »
Maybe some better. No longer get the nag baloon about automatic updates turned off. MSconfig now shows automatic updates but the service is stopped. I normally have updates set to notify, only, so I changed to "automatic" and rebooted a couple times. No change. Then went to MS to try a manual update. Evidently the combofix lost a few things including the windows update agent.

MS offered to download/install the agent but gave a "cannot open web page" error.

Attached is the combofix log.
« Last Edit: January 28, 2012, 01:10:17 AM by evcox »

Offline essexboy

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Re: Virus Win32:ZAccess-EF[Tr]
« Reply #18 on: January 28, 2012, 11:56:12 AM »
An SFC scan would now seem to be the next option

Could you run that please and then let me know of any error messages that you get when you try to start windows updates

evcox

  • Guest
Re: Virus Win32:ZAccess-EF[Tr]
« Reply #19 on: January 28, 2012, 12:37:59 PM »
I'll have to go get my windows install cd's. They are not at my current location (I'm at a freind's taking care of family while he's in hospital).

I would probably consider a Windows reinstall, anyway, to clear some obsolete/unused app's. I hate to go through all the install and setup stuff but have already cost more of my time and your's than a reinstall would take.

The main reason I wanted to try and CORRECT the problem is that Avast initially failed COMPLETELY to catch the bug. Not when it got downloaded, not when it installed, not (at first) when I did a scan. Only after I fooled around using another, clean machine, did Avast catch it. And then, it only got one file whereas, later, it detected more as I was going to quarantine them. Those additional files had NOT been caught by several scans initiated through Avast GUI.

When searching the web for answers, there were several which were quite similar but not EXACTLY like my problem. Thinking this might be a new variant that you folks would like to know about is what I thought most important.

It will be a while before I can get back home. Will see what I can do with SFC or a repair of Windows. Later, then. And many thanks for your help.

Offline essexboy

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Re: Virus Win32:ZAccess-EF[Tr]
« Reply #20 on: January 28, 2012, 01:58:19 PM »
If you have the dropper that would be the best file to have

I have a tutorial for reinstall here http://www.geekstogo.com/forum/topic/173729-reformat-and-install-of-windows/

evcox

  • Guest
Re: Virus Win32:ZAccess-EF[Tr]
« Reply #21 on: January 30, 2012, 04:35:30 AM »
Hi essexboy -- I'm back for a while. Being a 76 year old geezer, taking care of someone else's kids is a real chore. But, they're good youngsters and he's a good freind and quite ill.

Well, good (more or less) news first. Without any corrective success on my part, my system MAY now be nearly normal. My attempt at SFC failed almost immediately do to corrupted or missing files/folders. (paraphrase somewhat.) Maybe, though it did do something because, after several reboots over a lengthy period of time and me usually trying a Windows update, suddenly it WORKED!!! Also, the Avast service which, with your initial help, showed up in TaskManager, but "stopped", is now shown as "running". Virus scan detecting nothing now.

The attempt to restore to a supposedly clean state failed (maybe because I'd had different drives at the time the RP had been taken?)

I've been trying to establish a definitive timeline for you to see which file got caught first along with subsequent detections. The time-stamps, though, don't make sense.

What, exactly, does the "last changed" date in the Virus Chest screen mean? On this (my main) machine where the problem started, the Chest currently showes a few files stamped around 3AM on the 18th of Jan. On the backup machine I'd first used to try correction, the Chest shows several files stamped aroud 3AM on the 17th. Those had been in the Docs&settings AND in a folder I'd created to save the D&S before I mucked around with it. But that "save" folder hadn't even been created until about 5:30 on the 17th. That's 2 hours AFTER the time the Chest date indicates they got detected in that folder??? On both machines, the Chest "time" extends over just a few minutes.

I would have thought a text log would have been created which would show the actual events. That would also be helpful to cut and paste info for you. Maybe that will be a future suggestion. Right now, these dates/times don't seem to make sense.

But, again, the machine seems mostly OK. Thanks very much for your help.

Offline essexboy

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Re: Virus Win32:ZAccess-EF[Tr]
« Reply #22 on: January 30, 2012, 08:36:43 PM »
As Avast did not catch the dropper it will not be in the chest..  In all probability it self deleted as soon as it ran

Subject to no further problems   :)

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems 

Now the best part of the day ----- Your log now appears clean  :thumbsup:

A good workman always cleans up after himself so..The following will implement some cleanup procedures as well as reset  System Restore points:

Remove ComboFix
  • Hold down the Windows key + R on your keyboard. This will display the Run dialogue box
  • In the Run box, type in ComboFix /Uninstall
     (Notice the space between the "x" and "/")
    then click OK
    .

    .
  • Follow the prompts on the screen
  • A message should appear confirming that ComboFix was uninstalled
.
Run OTL and hit the cleanup button.  It will remove all the programmes we have used plus itself. 
.
We will now confirm that your hidden files are set to that, as some of the tools I use will change that
  • Click Start.
  • Open My Computer.
  • Select the Tools menu and click Folder Options.
  • Select the View Tab.
  • Under the Hidden files and folders heading select Do not show hidden files and folders.
  • Click Yes to confirm.
  • Click OK.
.
    Your Java is out of date.
Older versions have vulnerabilities that malware can use to infect your system.
Please follow these steps to remove older version of Java components and upgrade the application.
.
 Upgrading Java:
  • Go to this site  and click Do I have Java
  • It will check your current version and then offer to update to the latest version
.
Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

Malwarebytes.

Update and run weekly to keep your system clean
.
Download and install FileHippo update checker and run it monthly it will show you which programmes on your system need updating and give a download link
.
It is critical to have both a firewall and anti virus to protect your system and to keep them updated. To keep your operating system up to date visit .
To learn more about how to protect yourself while on the internet read our little guide  How did I get infected in the first place ?Keep safe  :wave: