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(apparently) nonfunctioning AV - worse than useless?


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#1 wutwut

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Posted 30 September 2011 - 04:11 AM

my computer had been running slowly & doing odd things for a while, but symantec never detected any infections. wasn't too impressed, as it hasnt updated virus definitions for many months. downloaded avast yesterday, and within 24 hours it had already caught some malware (win32:malware-gen).
Avast recommends that i remove symantec - if it really has stopped updating, is it now worse than useless? Im slightly apprehensive about doing this because it is a paid-for version that was already installed when i bought th machine second hand, and i reason that a working paid-for product will serve me better than working freeware?

Also, how regularly would one expect to get infected? because i've been having problems for a while, but symantec hasnt detected anything for as long as i can remember. Im worried that ive got a bit of a backlog of viruses poking around my computer

Edited by wutwut, 30 September 2011 - 04:13 AM.


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#2 Spartacus1

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Posted 30 September 2011 - 08:38 AM

If your Symantec product is expired, you could uninstall it and use avast or upgrade to a newer version.
If your worried that some malware might still be on your machine, run SUPERAntiSpyware (http://www.superantispyware.com/)(Update before scanning) and MalwareBytes (http://www.malwarebytes.org/)(Update before scanning)
May thou virus bow at thy mercy when you come to me...

#3 boopme

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Posted 30 September 2011 - 08:53 AM

You must remove Symantec .. having 2 AV's will cause slowness and conflicts.
Download and run the Norton Removal Tool
Reboot

What is Avast finding??
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#4 wutwut

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Posted 30 September 2011 - 10:25 AM

avast has found a .dll in system32, a win32:malware-gen.
this wasnt from a full scan, it just found it while i was browsing.

#5 boopme

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Posted 30 September 2011 - 02:41 PM

Also, how regularly would one expect to get infected?

Hopefully not often at all.

Lets look at some things and get that MBAM log.

Please download MiniToolBox, save it to your desktop and run it.

Checkmark the following checkboxes:
  • Flush DNS
  • Report IE Proxy Settings
  • Reset IE Proxy Settings
  • Report FF Proxy Settings
  • Reset FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List Winsock Entries
  • List last 10 Event Viewer log
  • List Installed Programs
  • List Users, Partitions and Memory size.
  • List Minidump Files
Click Go and post the result (Result.txt). A copy of Result.txt will be saved in the same directory the tool is run.

Note: When using "Reset FF Proxy Settings" option Firefox should be closed.


Next run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware and save it to your desktop.
Download Link 1
Download Link 2MBAM 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.

Troubleshoot Malwarebytes' Anti-Malware
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