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win32:trojan removed by avast


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8 replies to this topic

#1 betsybeet

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Posted 27 May 2010 - 10:48 PM

I found out my yahoo email account had been sending spam to my contacts and checked to see if i had a trojan. Avast discovered 8 infected folders (win32:trojan) when i did a boot scan and these have all been deleted. Is it gone now?
what else should I do?
I have changed all my passwords on a different computer just incase its not.
I think the spam was the only symptom, I didnt have any popups and my computer was running completely normally. I wouldnt have even noticed if someone hadnt told me they had recieved an email from me telling them to buy and ipad. Am I out of the woods?
Im not very good with computers so Im out of ideas, I downloaded a maleware scanner to search out anything else but it hasnt found anything.

Edited by Budapest, 27 May 2010 - 10:58 PM.
Moved from XP ~BP


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#2 quietman7

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Posted 28 May 2010 - 07:36 AM

Please download Malwarebytes Anti-Malware (v1.46) 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.
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#3 betsybeet

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Posted 28 May 2010 - 07:52 AM

I ran a quick then full scan with malwarebytes anti malware earlier today after avast had deleted the 8 infected files during the boot time scan. this was the result it said there were no infected files so i guess it must be gone right?
heres the report from malwarebytes anti malware for the quick scan:
Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4150

Windows 5.1.2600 Service Pack 2
Internet Explorer 8.0.6001.18702

5/28/2010 12:02:44 PM
mbam-log-2010-05-28 (12-02-44).txt

Scan type: Quick scan
Objects scanned: 118417
Time elapsed: 6 minute(s), 55 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 2
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\FirewallDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)








And here the one from the full scan done later after the 2 infected files from the quick scan were moved to quarantine:
Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4150

Windows 5.1.2600 Service Pack 2
Internet Explorer 8.0.6001.18702

5/28/2010 1:09:21 PM
mbam-log-2010-05-28 (13-09-21).txt

Scan type: Full scan (C:\|D:\|G:\|)
Objects scanned: 205478
Time elapsed: 43 minute(s), 46 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)


Hope this sheds some more light on it. I have run another boot-time scan with avast just before and it didnt find anything. So hopefully its gone righ? Otherwise Im thinking I might take the computer to a technican just to be safe. But the computer is acting perfectly fine and no more emails have gone out to my contacts from what my friends have told me.

#4 quietman7

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Posted 28 May 2010 - 08:41 AM

Try doing an online scan to see if you find anything else that the other scans may have missed.

Please perform a scan with Kaspersky Online Virus Scanner.
-- Requires free Java Runtime Environment (JRE) to be installed before scanning for malware as ActiveX is no longer being used.
-- This scan will not remove any detected file threats but it will show where they are located so they can be cleaned with other tools.
  • Vista users need to right-click the IE or FF Start Menu or Quick Launch Bar icons and Run As Administrator from the context menu.
  • Read the "Advantages - Requirements and Limitations" then press the Posted Image... button.
  • You will be prompted to install an application from Kaspersky. Click the Run button. It will start downloading and installing the scanner and virus definitions.
  • When the downloads have finished, you should see 'Database is updated. Ready to scan'. Click on the Posted Image... button.
  • Make sure these boxes are checked. By default, they should be. If not, please check them and click on the Posted Image... button afterwards:
    • Detect malicious programs of the following categories:
      Viruses, Worms, Trojan Horses, Rootkits
      Spyware, Adware, Dialers and other potentially dangerous programs
    • Scan compound files (doesn't apply to the File scan area):
      Archives
      Mail databases
  • Click on My Computer under the Scan section. OK any warnings from your protection programs.
  • The scan will take a while so be patient and do NOT use the computer while the scan is running. Keep all other programs and windows closed.
  • Once the scan is complete (the 'status' will show complete), click on View Scan Report and any infected objects will be shown.
  • Click on Save Report As... and change the Files of type to Text file (.txt)
  • Name the file KAVScan_ddmmyy (day, month, year) before clicking on the Save button and save it to your Desktop.
  • Copy and paste (Ctrl+C) the saved scan results from that file in your next reply.
-- Note: Some online scanners will detect existing anti-virus software and refuse to cooperate. You may have to disable the real-time protection components of your existing anti-virus and try running the scan again. If you do this, remember to turn them back on after you are finished.
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#5 betsybeet

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Posted 31 May 2010 - 04:59 AM

i did an online scan through windows live and it said it was all clear but now my documents is missing from the start menu and even if i click customize under properties it doesn't even show up for me to reinstall it. i dont know what to do about it anymore and i have heaps of assignments on for uni and i kind of need a working computer right now. An xp service package was installed recently could that have restored the trojan? please help!

#6 quietman7

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Posted 31 May 2010 - 10:30 AM

I doubt the update had anything to do with that missing My Documents folder link.

Right-clicking on the Start Menu > Customize > Advanced tab and ensuring Display as a link is checked was the correct step to try first. Is the folder available on the desktop or in Windows Explorer?

You can try using System Restore or System Restore from a command prompt in Safe Mode to return to a previous state before that issue began?
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#7 betsybeet

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Posted 31 May 2010 - 04:55 PM

it is still available under my computer, so the folder is still there. I did another boot scan and avast found nothing. So im picturing this thing lurking somewhere in my computer. so i should run a Malwarebytes' Anti-Malware 1.46 scan in safe mode to see if it can pick anything up? Cause the missing link is probably indicative the trojan is still hanging around right?

#8 quietman7

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Posted 01 June 2010 - 07:34 AM

Cause the missing link is probably indicative the trojan is still hanging around right?

Not necessarily. Did you try the system restore?
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#9 betsybeet

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Posted 02 June 2010 - 04:33 AM

Yeah I did and it hasn't come back.




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