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100% CPU Usage-system instability


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#1 Nick76

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Posted 27 August 2010 - 04:59 AM

Hello Sirs / Madams,

I have serious problem lately with my computer, leading me to suspect a virus/trojan infection. The symptoms are the following:

- Frequent system instability, 100% of CPU running, infrequent BSDs

- When I try to run a full system scan with Mcafee Viruscan Enterprise, although I am setting up the program to scan All Files, only a small fraction of the files is scanned and most of them are skipped. Moreover, the program is not capable anymore to automatically update the virus definitions (it can be done manually)

- During the last 15 days, Mcaffee has found two threats during some automatic scans that are run overnight (unfortunately I accidentally deleted the log file but the name of the threats were Generic Dropper!dge and Artemis!448D85D07)

- On some occasions when the computer is very slow and I try to restart it, I get messages about programs and drivers that "Do not respond and must be terminated". Among those, I have seen some strange name(s) of programs consisting of asian characters (I am not asian nor have I any asian language installed on my pc)

- In the Access Protection Log of Mcfee, I see repeatedly the line

15/7/2010 5:18:43 πμ Blocked by Access Protection rule NT AUTHORITY\NETWORK SERVICE C:\WINDOWS\system32\wbem\wmiprvse.exe C:\WINDOWS\system32\tftp.exe Anti-virus Standard Protection:Prevent use of tftp.exe Action blocked : Read

Other strange lines that occur in the same log:

18/7/2010 3:13:08 πμ Blocked by Access Protection rule C:\download\VeohWebPlayerSetup_eng.exe \REGISTRY\MACHINE\SOFTWARE\McAfee\DesktopProtection Common Standard Protection:Prevent modification of McAfee files and settings Action blocked : Write

18/7/2010 2:44:46 πμ Blocked by Access Protection rule C:\PROGRA~1\WINZIP\winzip32.exe C:\Documents and Settings\dimon0\Local Settings\Temp\wze6f1\procexp.exe Common Standard Protection:Prevent common programs from running files from the Temp folder Action blocked : Execute

19/7/2010 6:20:43 μμ Blocked by Access Protection rule C:\WINDOWS\system32\packager.exe C:\WINDOWS\Temporary Internet Files\Content.IE5\U16BUJOJ\C__DOCUME~1_PHILLI~1_Desktop_Bpcalc[1].exe Common Standard Protection:Prevent common programs from running files from the Temp folder Action blocked : Execute



I am running Windows XP Professional Service Pack 3, and I am at your disposal for any other information you might need.

Thank you in advance for your help.


Regards,
Nikos

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#2 Budapest

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Posted 01 September 2010 - 02:09 AM

Please download Malwarebytes Anti-Malware and save it to your desktop.Download Link 1
Download Link 2
MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you. Temporarily disable such programs or permit them to allow the changes.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself. Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 Nick76

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Posted 02 September 2010 - 02:28 PM

Hi Budapest,

Thank you for your message, I am really grateful for your help.

I followed your instructions and MBAM did not find anything to clean. Please find below the log file:


Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4532

Windows 5.1.2600 Service Pack 3
Internet Explorer 6.0.2900.5512

2/9/2010 9:56:58 μμ
mbam-log-2010-09-02 (21-56-58).txt

Scan type: Quick scan
Objects scanned: 151061
Time elapsed: 17 minute(s), 25 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

To be honest, ΜΒΑΜ was already installed on my PC, but I removed it and installed it again according to your instructions. Looking at the previously Quarantined items from past scans, I saw a suspicious item called Avdrn.dat, that was found in c:\Documents and Settings\<user>\Application Data
I looked it up on google and found that it might be part of a rootkit? This threat was found a while ago, but after that I never followed up the issue to find out whether there any other remains on my PC.
I hope this helps.

Best Regards,
Nikos

#4 Budapest

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Posted 02 September 2010 - 03:59 PM

Please download and scan with SUPERAntiSpyware Free
  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If it will not start, go to Start > All Prgrams > SUPERAntiSpyware and click on Alternate Start.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • In the Main Menu, click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and under Scanner Options, make sure the following are checked (leave all others unchecked):
    • Close browsers before scanning.
    • Scan for tracking cookies.
    • Terminate memory threats before quarantining.
  • Click the "Close" button to leave the control center screen and exit the program.
  • Do not run a scan just yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with SUPERAntiSpyware as follows:
  • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • If asked if you want to reboot, click "Yes" and reboot normally.
  • To retrieve the removal information after reboot, launch SUPERAntispyware again.
    • Click Preferences, then click the Statistics/Logs tab.
    • Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
    • If there are several logs, click the current dated log and press View log. A text file will open in your default text editor.
    • Please copy and paste the Scan Log results in your next reply.
  • Click Close to exit the program.
If you have a problem downloading, installing or getting SAS to run, try downloading and using the SUPERAntiSpyware Portable Scanner instead. Save the randomly named file (i.e. SAS_1710895.COM) to a usb drive or CD and transfer to the infected computer. Then double-click on it to launch and scan. The file is randomly named to help keep malware from blocking the scanner.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw




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