Trojan:Win32/Sirefef.AB + Trojan:Win64/Sirefef.P

Discussion in 'Malware Help - MG (A Specialist Will Reply)' started by thebillo, Jun 7, 2012.

  1. thebillo

    thebillo Private E-2

    Hi,
    I'm stuck with Microsoft Security Essentials detecting two trojans upon startup:

    Trojan:Win32/Sirefef.AB
    Trojan:Win64/Sirefef.P

    Located in:
    C:\Windows\assembly\GAC_32\Desktop.ini
    C:\Windows\assembly\GAC_64\Desktop.ini

    I ran everything on the READ & RUN ME (except RootRepeal as I got Windows 7 Professional x64).

    I hope I have attached all needed logs.

    P.S. I'm pretty sure that the KMService.exe in the MBAM log is a false positive (It's MSOffice activator).
     

    Attached Files:

  2. thebillo

    thebillo Private E-2

    Also this:
     

    Attached Files:

  3. thebillo

    thebillo Private E-2

    By the way I also tried to run "aswMBR.exe" but after a while it crashes on me.
     
  4. TimW

    TimW MajorGeeks Administrator - Jedi Malware Expert Staff Member

    It looks like Combo cleared the infection. What issues are remaining, if any?
     
  5. thebillo

    thebillo Private E-2

    It didn't. The two files are still there after the reboot.
    Should I retry Combo?
     
  6. TimW

    TimW MajorGeeks Administrator - Jedi Malware Expert Staff Member

    Yes, re-run Combo and also 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). Attach both logs.
     
  7. thebillo

    thebillo Private E-2

    Here's the logs after Combo and MGtools re-run.
     

    Attached Files:

  8. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Uninstall the below old versions of software:
    Java(TM) 6 Update 30

    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.
    • If ComboFix tells you it has expired or need to be updated to a new version, make sure you allow it to update.
    • 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.

    If after running Combofix you discover none of your programs will open up because you recieve the following error: Illegal operation attempted on a registry key that has been marked for deletion then you will need to reboot your computer which will normally fix this problem.

    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista or Win7, 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!
     
  9. thebillo

    thebillo Private E-2

    I followed all the instructions but the two Desktop.ini are still there and still infected (after rebooting and scanning with MSSE).

    Don't tell me I shouldn't have re-enabled MSSE after the ComboFix.

    Also during the MGtools scan I'm getting this message:
    "Ordinal 1108 could not be located in dynamic link library WSOCK32.dll"

    Here are the logs:
     

    Attached Files:

  10. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Please do the below so that we can boot to System Recovery Options to run a scan.

    For 32-bit (x86) systems downloadFarbar Recovery Scan Tool and save it to a flash drive.
    For 64-bit (x64) systems downloadFarbar Recovery Scan Tool x64 and save it to a flash drive.

    Plug the flashdrive into the infected PC.

    Enter System Recovery Options from the Advanced Boot Options:
    • Restart the computer.
    • As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
    • Use the arrow keys to select the Repair your computer menu item.
    • Select US as the keyboard language settings, and then click Next.
    • Select the operating system you want to repair, and then click Next.
    • Select your user account an click Next.

    On the System Recovery Options menu you will get the following options:
    • Select Command Prompt
    • In the command window type in notepad and press Enter.
    • The notepad opens. Under File menu select Open.
    • Select "Computer" and find your flash drive letter and close the notepad.
    • In the command window type e:\frst.exe (for x64 bit version type e:\frst64) and press Enter
      Note: Replace letter e with the drive letter of your flash drive.
    • The tool will start to run.
    • When the tool opens click Yes to disclaimer.
    • Press Scan button.
    • It will make a log (FRST.txt) on the flash drive. Please attach this file to your next reply. (See: How to attach)
     
  11. thebillo

    thebillo Private E-2

    Here's the log.
    (Issue is still there after the reboot.)
     

    Attached Files:

  12. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Download this >> View attachment fixlist.txt

    Save fixlist.txt to your flash drive.
    • You should now have both fixlist.txt and FRST64.exe on your flash drive.
    Now reboot back into the System Recovery Options as you did previously.
    Run FRST64 and press the Fix button just once and wait.
    The tool will make a log on the flashdrive (Fixlog.txt).
    Please attach this to your next message. (See how to attach)

    Now boot into normal Windows can continue with the below.


    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista or Win7, don't double click, use right click and select Run As Administrator).

    Then attach the below logs:
    • Fixlog.txt
    • C:\MGlogs.zip
    Make sure you tell me how things are working now!
     
  13. thebillo

    thebillo Private E-2

    LOGSā†’HERE

    From the prompt windows it seemed that MGtools couldn't scan c:\Windows\assembly\GAC_32\Desktop.ini
    *ACCESS DENIED*
     

    Attached Files:

  14. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    You have the most recent form of Zero Access infection. We have some mode hidden stuff to find to get this fully fixed. Let's try another fix followed by a using a new version of MGtools.

    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.



    Download this >> View attachment fixlist.txt

    Save fixlist.txt to your flash drive.
    • You should now have both fixlist.txt and FRST64.exe on your flash drive.
    Now reboot back into the System Recovery Options as you did previously.
    Run FRST64 and press the Fix button just once and wait.
    The tool will make a log on the flashdrive (Fixlog.txt).
    Please attach this to your next message. (See how to attach)

    Now boot into normal Windows can continue with the below.

    Now download the current version of MGtools and save it to your root folder. Overwrite your previous MGtools.exe file with this one.

    Run MGtools.exe ( Note: If using Vista or Win7, make sure UAC is still disabled. Also don't double click on it, use right click and select Run As Administrator )

    Now attach the below log:
    • the new Fixlog.txt log from FRST
    • C:\MGlogs.zip
    Make sure you tell me how things are working now!
     
  15. thebillo

    thebillo Private E-2

    Thanks chaslang for helping me with this infection. It seems like a bad one.
    I did everything you said but it didn't help much, apparently.
    Here are the logs you asked for.
     

    Attached Files:

  16. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Okay, now run the C:\MGtools\ZAchk.bat file by double clicking on it (Note: if using Vista or Win7, don't double click, use right click and select Run As Administrator).

    Then attach the below log which should have been updated after running the above:
    • C:\MGlogs.zip
     
  17. thebillo

    thebillo Private E-2

    Done.
     

    Attached Files:

  18. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Delete your current copy of ComboFix.exe and then download and save the current version to your Desktop. Get it here >> combofix.exe


    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.
    • If ComboFix tells you it has expired or need to be updated to a new version, make sure you allow it to update.
    • 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.

    If after running Combofix you discover none of your programs will open up because you recieve the following error: Illegal operation attempted on a registry key that has been marked for deletion then you will need to reboot your computer which will normally fix this problem.
    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista or Win7, 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!
     
  19. thebillo

    thebillo Private E-2

    OK, now it seems that the files have been deleted (I rebooted twice).
    Now I'm going to reboot re-activating MSSE at startup.
    Let's see...

    Meanwhile, LOGS:
     

    Attached Files:

  20. thebillo

    thebillo Private E-2

    Yes! Everything seems good now!
    Thanks for your precious help. I can't thank you enough.
    Is there anything else I should do now to be sure the malware has gone forever?
     
  21. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    You're welcome.

    Your logs look good now.


    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" /uninstall
        • Notes: The space between the combofix" and the /uninstall, it must be there.
        • This will uninstall ComboFix and also reset hidden files and folders settings back to Windows defaults.
    3. Go back to step 6 oof the READ ME and renable your Disk Emulation software with Defogger if you had disabled it.
    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 or Win 7, 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. Goto the C:\MGtools folder and find the MGclean.bat file. Double click on this file to run this cleanup program that will remove files and folders
      related to MGtools and some other items from our cleaning procedures.
    9. If you are running Win 7, Vista, Windows XP or Windows ME, do the below:
      • Refer to the cleaning procedures pointed to by step 7 of 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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