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Possible Trjoan/Malware infection on PC Not sure how to approach it


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#1 cocopuffs

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Posted 11 December 2008 - 03:56 AM

Hello.

I am new to this forum and my knowledge of computer troubleshooting is quite limited, especially when it comes to infestations. I will try to be as detailed as possible in my problem.

My computer has been running insanely slow within the past 2 months (I have Cable connection). When I browse the internet; after a short amount of time (ususally 10-15 minutes) the internet page(s) will freeze and become unresponsive. At this point, I usually CTRL-ALT-DELETE in order to end the program.

I did a scan with Spybot and it was found that there is a possible Trojan called Cassava with 3 entries in my registry files. In additon to this, Spybot also found the following items with 1 or 2 entries: Zango.ShoppingReport, Zango.AntiSpamBar, Zango, Virtumonde.sci, Virtumonde, RealDownloadExpress, Hotbar, GAIN.Gator, GAIN.DashBar, DSO Exploit, DCON, Zango.WeatherDPA and Alexa Related.

I looked up all the entries through google and the general consensus was that Cassava was a Trojan. What type of Trojan, I do not know. The rest seem to be spyware or malware, of these I am also not sure. I have tried running immunization, quarentine and fixing these issues through Spybot with no luck. From there, I downloaded a program called Kapersky Internet Security 7.0, which after running a scan and trying to fix the selected problems also proved fruitless.

In alot of the forums I have visted, there has been alot of talk about Hijackthis. However, I do not understand the language used when people post their logs and posts solutions. Therefore, I am at a standstill. I have not received any error messeges throughout all of this except one, and it was a messege that seemed to come out of nowhere that said my computer has "just recovered from a seriouse problem". This messege was in relation to an aparent "Blue Screen Error" that had just recently occured (this happened 3 days ago). Since then, I haven't seen that messege again, nor seen the dreaded Blue Screen.

My PC also has a tendency to restart itself without me telling it to. I have no idea what's going on. I have downloaded Hijackthis and saved the log. But because I don't know how to read the files that are logged in order to tell the difference between what's a safe vs. unsafe file, I haven't done anything else with Hijack. And now I am here.

I hope there is someone who can help me resolve this problem and walk me through the process. The computer I am using is and eMachines with Windows XP Home Edition. My browser is Internet Explorer 8.0. The only programs I have actively running (according to my knowledge) are thins like AIM, Spybot, Kapersky and MSN Messenger, Autoruns. I do not have games installed on this PC nor do I have music files or movies. So I am not quite sure how whatever is on my computer got in. It deffinetly seems like my PC is about to kick the bucket soon if somthing isn't figured out. I've had the computer for about 4 years, but have used it minimally until now. My mother, getting frustrated tried to download this software called Finally Fast, which is supposed to help clean your PC, despite my lack of trust in it.

Any and all help is greatly appreciated. If any additional information is needed, I will do my best to comply.

Edited by cocopuffs, 11 December 2008 - 03:57 AM.


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#2 rigel

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Posted 11 December 2008 - 01:37 PM

When you download Kaspersky, did you already have an anti-virus program running? If you did, you need to remove one or the other. (Personally - I like Kaspersky)

Let's try a Malwarebytes (MBAM) scan

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • 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 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 and exit MBAM.
Note:
-- If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes.



Also, HijackThis logs cannot be analyzed in this area. If needed, we will transfer you to that forum for inspection.

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