Persistent Malware

Discussion in 'Malware Help - MG (A Specialist Will Reply)' started by seph29, May 14, 2009.

  1. seph29

    seph29 Private E-2

    I'm in the process of helping a friend get their PC back to normal. When I first received it, the computer's internet connection was hijacked and a virus was shutting down net-related processes and playing around with antivirus programs. I was able to remove this infection manually and install Avast, which removed the rest of the infection and recognized the culprit file that I found as a virus without problems. And delete it. I uninstalled some of his outdated versions of Acrobat reader, java, etc, and updated them, and then proceeded to do secondary scane with SuperAntiSpyware and MalwareByte's Antimalware, and ASquared, all of which found more spyware/potential threats and were able to remove all but one of them successfully. The only problem remaining is what SUPERAntiSpyware identifies as "Trojan.Media-Codec/V4". Despite my attempts to remove it, SUPERAntiSpyware simply finds the same thing again after rebooting and rescanning, so I'm in need of some assistance. There do not appear to be any symptoms other than the repeated presence of the malware in SAS's scan.

    Attached are the log files from the FIRST round of scans I did with each of the tools. Successive scans with SAS show all 14 elements of "Trojan.Media-Codec/V4" and nothing else. MBAM now shows a clean scan. I have only run MGTools and ComboFix once, and each was right before posting this thread.

    Thanks for the help!
     

    Attached Files:

  2. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Welcome to Major Geeks!

    Run this Disable/Remove Windows Messenger to remove Windows Messenger. Do not confuse Windows Messenger with MSN Messenger because they are not the same. Windows Messenger is a frequent cause of popups.

    Run C:\MGtools\analyse.exe by double clicking on it (Note: if using Vista, don't double click, use right click and select Run As Administrator). This is really HijackThis (select Do a system scan only) and select the following lines but DO NOT CLICK FIX until you exit all browser sessions including the one you are reading in right now:

    O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll (file missing)
    O2 - BHO: AVG Security Toolbar - {A057A204-BACC-4D26-9990-79A187E2698E} - C:\PROGRA~1\AVG\AVG8\AVGTOO~1.DLL (file missing)
    O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.0.926.3450\swg.dll (file missing)
    O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_219B3E1547538286.dll (file missing)
    O3 - Toolbar: AVG Security Toolbar - {A057A204-BACC-4D26-9990-79A187E2698E} - C:\PROGRA~1\AVG\AVG8\AVGTOO~1.DLL (file missing)
    O4 - HKUS\S-1-5-18\..\Run: [DWQueuedReporting] "C:\PROGRA~1\COMMON~1\MICROS~1\DW\dwtrig20.exe" -t (User 'SYSTEM')
    O4 - HKUS\.DEFAULT\..\Run: [DWQueuedReporting] "C:\PROGRA~1\COMMON~1\MICROS~1\DW\dwtrig20.exe" -t (User 'Default user')
    O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
    O9 - Extra button: Run IMVU - {d9288080-1baa-4bc4-9cf8-a92d743db949} - C:\Documents and Settings\Halyko Family\Start Menu\Programs\IMVU\Run IMVU.lnk (file missing)
    O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG8\avgpp.dll (file missing)

    After clicking Fix, exit HJT.

    Now we need to use ComboFix to remove a bunch of malware files.
    • 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 needs to update 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.

    Now run SUPERAntiSpyware and first update it. The run a new scan.

    Now run Ccleaner. Only use the Run Cleaner button. Do not run anything else on any other forms.

    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 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:
    • C:\ComboFix.txt
    • the new SUPERAntiSpyware log
    • C:\MGlogs.zip
    Make sure you tell me how things are working now!
     
  3. seph29

    seph29 Private E-2

    No visible problems remain.

    I actually removed these two registry keys (and their subkeys) before receiving your response:

    HKEY_LOCAL_MACHINE\software\Classes\CLSID\{21ECA600-72B5-4E66-BB2E-573C92CBD8D6}
    HKEY_LOCAL_MACHINE\software\Classes\CLSID\{C4DFA6F3-1245-41E5-8E60-7D31427F01B3}

    It was a pain in the bum because they somehow managed to lock regedit out from doing anything to them (couldn't change permissions, delete, pretty much anything). I had to resort to some more primitive measures. Removing these two keys actually completely cleared out the SAS scan. I wasn't able to find the files that it was referencing, so I'm not sure that they ever existed. Anyway, if you see that some keys related to these two keys weren't deleted in my combofix log even though it was in your script, this is why.

    Also, I forgot to remove windows messenger before running all of the logging programs, so that's why it will probably still show up. Oops :-o It's now been uninstalled.

    Anyway, everything else seems good. Let me know if you see anything else out of place in the new logs.
     

    Attached Files:

  4. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    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. Any other miscellaneous tools we may have had you install or download can be uninstalled and deleted.
    4. If we had you download any registry patches like fixme.reg or fixWLK.reg (or any others), you can delete these files now.
    5. 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.
    6. Go to add/remove programs and uninstall HijackThis.
    7. You can delete the C:\MGtools folder and the C:\MGtools.exe file. You can also delete the C:\MGlogs.zip
    8. 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.
    9. After doing the above, you should work thru the below link:
     

MajorGeeks.Com Menu

Downloads All In One Tweaks \ Android \ Anti-Malware \ Anti-Virus \ Appearance \ Backup \ Browsers \ CD\DVD\Blu-Ray \ Covert Ops \ Drive Utilities \ Drivers \ Graphics \ Internet Tools \ Multimedia \ Networking \ Office Tools \ PC Games \ System Tools \ Mac/Apple/Ipad Downloads

Other News: Top Downloads \ News (Tech) \ Off Base (Other Websites News) \ Way Off Base (Offbeat Stories and Pics)

Social: Facebook \ YouTube \ Twitter \ Tumblr \ Pintrest \ RSS Feeds