Is there a solution for BV:autorun-G [wrm]?

Discussion in 'Malware Help (A Specialist Will Reply)' started by ronyotz, Mar 19, 2009.

  1. ronyotz

    ronyotz Private E-2

    Hello.

    Recently I caught this worm or malware from an infected usb port.

    Whenever I insert my usb, my Avast antivirus detects BV:autorun-G [wrm] and a "RECYCLER" folder and "autorun.inf" file are created in the usb drive.

    I've opened the autorun.inf file with notepad and this is the information in it:

    Code:
    autorun
    open=RECYCLER\k-1-3542-4232123213-7676767-8888886\root.exe
    icon=%SystemRoot%\system32\SHELL32.dll,4
    action=Open folder to view files
    shell\open=Open
    shell\open\command=RECYCLER\k-1-3542-4232123213-7676767-8888886\root.exe
    shell\open\default=1 
    I've looked in c:\recycler\k-1-3542-4232123213-7676767-8888886\ but didn't find a root.exe file in it.

    I did a registry search for "root.exe" and found a couple of keys with "C:\RECYCLER\k-1-3542-4232123213-7676767-8888886\root.exe" as values, I've deleted them but came back with a system restart.

    Is there a way of getting rid of this malware for good, other than using the Flash Disinfector Tool? (That's the only partial solution I've found so far.)

    Thank you.
     
  2. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Flash Disinfector can help. And you can update your PC to current Microsoft Updates and then disable autoruns completely. But you may have other problems. Every system that you USB drive has been plugged into, may be infected. All hard disk partitions may now be carrying the infection.

    You really should do the below.

    Please follow the instructions in the READ & RUN ME FIRST link given futher down and attach the requested logs when you finish these instructions.

    • If you have problems where no tools seem to run, please try following the steps given in the below and then continue on no matter what you find. You only need to try the TDSSserv steps if having problems getting scans in the Read & Run Me First.
    • 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.
    READ & RUN ME FIRST. Malware Removal Guide
    • 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:


    1. 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:
    2. If you have problems downloading on the problem PC, download the tools and the manual updates for SUPERAntiSpyware, Malwarebytes and Spybot ( 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.
    3. To avoid additional delay in getting a response, it is strongly advised that after completing the READ & RUN ME you also read this sticky:
    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.
     
  3. ronyotz

    ronyotz Private E-2

    Hello, thanks for your response.

    I've gone through the "read and run me first" guide and a few bugs were found. I've attached the logs requested.

    Malwarebytes found that I have windows updates, windows firewall and "antivirus disable notify" disabled. I've ignored this cause i've manually disabled this three things.

    My problem with BV:autorun-G [wrm] seem to persist cause whenever I plug in a new usb device, Avast detects the malware.

    If the folder created by Flash Disinfector doesn't exists in the drive, the warning by Avast keeps popping up.

    So I don't know. Anyway I've attached the logs, maybe there's an answer there, thank you very much for all the help.
     

    Attached Files:

  4. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Have you cleaned these "new usb devices" ? How many are you using? Do they have autorun.inf files in the root folder or have you run FlashDisinfector to have it create a read only folder using the name autorun.inf. What other files do you see on these usb drives in the root folder?


    I see the below on your C drive:
    Code:
    C:\"
    AUTORUN.INF   Mar 19 2009              "autorun.inf"
    So I asssume you did this using FlashDisinfector?

    You appear to have Avast Antivirus and also Sunbelt CounterSpy VIPRE AntiVirus installed. If you are going to use Avast, you must uninstall CounterSpy immediately.


    Also uninstall the below old versions of software:
    Java(TM) 6 Update 10
    Java(TM) 6 Update 2
    Java(TM) 6 Update 3
    Java(TM) 6 Update 5
    Spybot - Search & Destroy 1.5.2.20

    Copy the bold text below to notepad. Save it as fixme.reg to your desktop. Be sure the "Save as" type is set to "all files" Once you have saved it double click it and allow it to merge with the registry.
    Make sure that you tell me if you receive a success message about adding the above
    to the registry. If you do not get a success message, it definitely did not work.

    Does the below file exist? If so try deleting it:
    c:\recycler\k-1-3542-4232123213-7676767-8888886\root.exe

    Now reboot your PC.

    After reboot, now install the current version of Sun Java from: Sun Java Runtime Environment


    Now run Ccleaner!

    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista, don't double click, use right click and select Run As Administrator).


    Then attach the below log:
    • C:\MGlogs.zip
    Make sure you tell me how things are working now!
     
  5. ronyotz

    ronyotz Private E-2

    I use 3 thumb drives, now every one has the "autorun.inf" folder created by Flash Disinfector, cause if they don't, the Avast virus warning pops up and the worm creates an "autorun.inf" file and a "RECYCLER" folder.

    Also if I insert a brand new usb drive, the warning pops up also, I have to "clean it" with Flash Disinfector first.


    This was created by Flash Disinfector I assume, cause I didn't create it.

    Done.

    Done

    It worked, I got the success message.

    I think this could be the problem cause i have C:\RECYCLER\k-1-3542-4232123213-7676767-8888886\ but not root.exe in it, and that is the file that the "autorun.inf" file created by the worm points to, as I mentioned in my first post.

    If i do a registry search for "root.exe" a couple of keys with "C:\RECYCLER\k-1-3542-4232123213-7676767-8888886\root.exe" as values appear, I've tried deleting them but they come back with a system restart.

    I now have the latest Windows updates, I've disabled autorun, but whenever I insert a clean usb drive, with nothing in it, the Avast warning pops up.

    I've attached the requested logs. Again, thank you very much for your time and all the help.
     

    Attached Files:

  6. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Please download and install the below patch from Microsoft to resolve an issue in which AutoRun featuresare not correctly disabled.

    http://www.microsoft.com/downloads/details.aspx?FamilyId=CC4FB38C-579B-40F7-89C4-1721D7B8DAA5&displaylang=en

    After installing this patch, reboot your PC even if it does not ask you to do so.



    Now we need to use ComboFix
    • Make sure that combofix.exe that you downloaded while doing the READ & RUN ME is on your Desktop but Do not run it!
      • If it is not on your Desktop, the below will not work.
    • Also make sure you have shut down all protection software (antivirus, antispyware...etc) or they may get in the way of allowing ComboFix to run properly.
    • Open Notepad and copy/paste the text in the below quote box into it:
    • Save the above as CFscript.txt and make sure you save it to the same location (should be on your Desktop) as ComboFix.exe
    • At this point, you MUST EXIT ALL BROWSERS NOW before continuing!
    • You should have both the ComboFix.exe and CFScript.txt icons on your Desktop.
    • Now use your mouse to drag CFscript.txt on top of ComboFix.exe
    • Follow the prompts.
    • When it finishes, a log will be produced named c:\combofix.txt
    • I will ask for this log below
    Note:

    Do not mouseclick combofix's window while it is running. That may cause it to stall.



    Now download Registry Search (see the link titled RegSearch Download Link )
    • Extract the files from Regsearch.zip into a folder.
    • Doubleclick regsearch.exe to start the program.
    • See the top 3 boxes under the Enter search strings (case independen) and click Ok... option, and enter the below two strings (use copy and past)
      • root.exe
      • k-1-3542-4232123213-7676767-8888886
    • Then click "OK".
    • Notepad will be opened with text in it (the file named RegSearch.txt will be saved in the program's folder as well).
    • Attach this RegSearch.txt file.
    Now run Ccleaner to clean out only temp files and nothing else!

    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista, don't double click, use right click and select Run As Administrator).



    Then attach the below logs:
    • C:\ComboFix.txt
    • C:\MGlogs.zip
    Make sure you tell me how things are working now! If Avast detects anything, you need to attach a log from Avast.
     
    Last edited: Apr 2, 2009
  7. ronyotz

    ronyotz Private E-2

    Well that seems to have done the trick chaslang!!

    That "KILLALL" stuff really killed it.

    I formatted a USB drive, inserted it...and nothing from Avast.

    I've searched inside C:\RECYCLER and I no longer have the k-1-3542-4232123213-7676767-8888886 folder.

    So I think everything's OK now.

    I've attached the logs requested anyway, if you want to take a look at them.

    Just a couple of questions:

    What do you recommend I should do to prevent this from happening again?

    Should I definitely not use a thumb drive in anyone else's computer?

    Should I use Flash Disinfector in any thumb drive as a prevention?

    I cannot thank you enough chaslang, and keep this wonderful forum alive.
     
  8. ronyotz

    ronyotz Private E-2

    sorry forgot the logs.
     

    Attached Files:

  9. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    You're welcome.

    What we did to disable autoruns will help, but if you bring in the infection from another PC via an infected USB drive and run the infection, this fix will not protect you.

    This is one good reason for using Flash Disinfector and keeping the folder in place. It could help when you use USB drives in other PCs; however, infections get smarter over a period of time too. So a smart version could eventually delete the folder from Flash Disinfector, which is why you also want to have all PCs use the fixes to disable AutoRuns.

    Your logs are clean.

    If you are not having any other malware problems, it is time to do our final steps:
    1. We recommend you keep SUPERAntiSpyware and Malwarebytes Anti-Malware for scanning/removal of malware. Unless you purchase them, they provide no protection. They do not use any significant amount of resources ( except a little disk space ) until you run a scan.
    2. If we had you use ComboFix, uninstall ComboFix (This uninstall will only work as written if you installed ComboFix on your Desktop like we requested.)
      • Click START then RUN and enter the below into the run box and then click OK. Note the quotes are required
      • "%userprofile%\Desktop\combofix" /u
        • Notes: The space between the combofix" and the /u, it must be there.
        • This will uninstall ComboFix and also reset hidden files and folders settings back to Windows defaults.
      • Delete the C:\combofix folder from combofix (if it exists)
    3. If we had you run Avenger, you can delete all files related to Avenger now.
    4. Any other miscellaneous tools we may have had you install or download can be uninstalled and deleted.
    5. If we had you download any registry patches like fixme.reg or fixWLK.reg (or any others), you can delete these files now.
    6. If running Vista, it is time to make sure you have reenabled UAC by double clicking on the C:\MGtools\enableUAC.reg file and allowing it to be added to the registry.
    7. Go to add/remove programs and uninstall HijackThis.
    8. You can delete the C:\MGtools folder and the C:\MGtools.exe file. You can also delete the C:\MGlogs.zip
    9. If you are running Vista, Windows XP or Windows ME, do the below:
      • Refer to the cleaning procedures in step 3 the READ ME for your Window version and see the instructions to Disable System Restore which will flush your Restore Points.
      • Then reboot and Enable System Restore to create a new clean Restore Point.
    10. After doing the above, you should work thru the below link:
     

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