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Trojan Backdoor.Win64.ZAccess.bs [Solved]


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#1
BadLuckBettie

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Yesterday, I used the Kaspersky Virus Removal Tool to scan my laptop and got a report back saying that it detected some Trojans and Viruses
  • Trojan program Backdoor.Win64.ZAccess.bs
  • Trojan program Backdoor.Win32.ZAccess.oun
  • Virus Virus.Win64.ZAccess.b
  • Trojan program Backdoor.Win32.ZAccess.uvz
  • Trojan program Backdoor.Win32.ZAccess.oun
  • Trojan program Backdoor.Win64.ZAccess.bs

I tried removing them with the same program but the laptop froze and I shut it down. When I tried to turn it on I kept getting a blue screen and had to do a system restore in order to get it to start again.

Once I did the system restore, I ran the scan again and this time only the Trojan program Backdoor.Win64.ZAccess.bs showed up. I removed it and did the scan another time and no trojans or viruses showed up.

Problem now is that my McAfee firewall won't work. I turn it on and in a couple of seconds it shuts off and there are no other firewalls enabled on the laptop. I believe my laptop is still infected and need help getting this taken care of. Thanks!
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#2
Essexboy

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Hi there first I will need a look at the system

Download OTL to your Desktop
  • Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.
    Posted Image
  • Select All Users
  • Under the Custom Scan box paste this in
    netsvcs
    %SYSTEMDRIVE%\*.exe
    /md5start
    services.*
    explorer.exe
    winlogon.exe
    Userinit.exe
    svchost.exe
    /md5stop
    HKEY_CURRENT_USER\Software\Microsoft\Windows Media\WMSDK\Local\AutoProxyCache /s
    CREATERESTOREPOINT
  • Click the Quick Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
  • When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
  • Post both logs

THEN

Download aswMBR.exe ( 4.8mb ) to your desktop.
Double click the aswMBR.exe to run it Click the "Scan" button to start scan

Posted Image

On completion of the scan click save log, save it to your desktop and post in your next reply

Posted Image
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#3
BadLuckBettie

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Here are the three logs.Attached File  OTL.Txt   119.13KB   62 downloadsAttached File  Extras.Txt   35.66KB   99 downloadsAttached File  aswMBR.txt   1.65KB   41 downloads
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#4
Essexboy

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On completion of these runs can you let me know what problems remain

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

Run OTL
  • Under the Custom Scans/Fixes box at the bottom, paste in the following
    Posted Image

    :Files
    C:\windows\Installer\{b3d2f7bb-5ebc-0c1b-d267-2d965eee3065}
    C:\Users\jose\AppData\Local\{b3d2f7bb-5ebc-0c1b-d267-2d965eee3065}

    :Commands
    [purity]
    [resethosts]
    [emptytemp]
    [CREATERESTOREPOINT]
    [Reboot]

  • Then click the Run Fix button at the top
  • Let the program run unhindered, reboot the PC when it is done
  • Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.

THEN

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

    Posted Image

    Posted Image
  • When finished, it shall produce a log for you.
  • Please include the C:\ComboFix.txt in your next reply.

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
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#5
BadLuckBettie

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Done everything seems to be working fine. The firewall finally stays on. Thanks!

Here are the logs for OTL & ComboFix: Attached File  OTL.Txt   94.76KB   41 downloadsAttached File  ComboFix.txt   20.46KB   51 downloads
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#6
Essexboy

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Looks good, a final check for orphans.. Once done could you let me know of any outstanding problems

Please download Malwarebytes' Anti-Malware

Double Click mbam-setup.exe to install the application.
  • Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
  • If an update is found, it will download and install the latest version.
  • Once the program has loaded, select "Perform Quick Scan", then click Scan.
  • The scan may take some time to finish, so please be patient.
  • When the scan is complete, click OK, then Show Results to view the results.
  • Make sure that everything is checked, and click Remove Selected.
  • When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.(See Extra Note)
  • The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
  • Copy&Paste the entire report in your next reply.
Extra Note:
If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts, click OK to either and let MBAM proceed with the disinfection process, if asked to restart the computer, please do so immediately.
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#7
BadLuckBettie

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Here is the log:

Malwarebytes Anti-Malware (Trial) 1.62.0.1300
www.malwarebytes.org

Database version: v2012.07.20.07

Windows 7 Service Pack 1 x64 NTFS
Internet Explorer 9.0.8112.16421
jose :: JOSE-PC [administrator]

Protection: Enabled

7/20/2012 12:39:48 PM
mbam-log-2012-07-20 (12-39-48).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 212582
Time elapsed: 5 minute(s), 22 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)
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#8
Essexboy

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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:

Run OTL
  • Under the Custom Scans/Fixes box at the bottom, paste in the following

    :Commands
    [resethosts]
    [emptytemp]
    [Reboot]

  • Then click the Run Fix button at the top
  • Let the program run unhindered, reboot the PC when it is done

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

    Posted Image
  • 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
  • Go to control panel
  • Select folder options (Appearance > Folder options in category view)
  • 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.

Posted Image
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

SPRING CLEAN

To manually create a new Restore Point
  • Go to Control Panel and select System
  • Select System
  • On the left select System Protection and accept the warning if you get one
  • Select System Protection Tab
  • Select Create at the bottom
  • Type in a name i.e. Clean
  • Select Create

Now we can purge the infected ones
  • GoStart > All programs > Accessories > system tools
  • Right click Disc cleanup and select run as administrator
  • Select Your main drive and accept the warning if you get one
  • For a few moments the system will make some calculations
  • Select the More Options tab
  • In the System Restore and Shadow Backups select Clean up
  • Select Delete on the pop up
  • Select OK
  • Select Delete

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:
Posted Image
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:
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#9
Essexboy

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Since this issue appears to be resolved ... this Topic has been closed. Glad we could help. :)

If you're the topic starter, and need this topic reopened, please contact a staff member with the address of the thread.

Everyone else please begin a New Topic.
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