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Might be infected, please help!


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#1 paranoid guy

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Posted 06 May 2011 - 07:29 PM

I was on irc, and a friend of mine PM'ed me a link. I was unsure weather to click it or not but... he convinced me. So i click it and i get a warning window from nod32 saying something was quarantined. So i check the quarantine and it says possibly a variant of a .NIF trojan. Then I deleted it from the quarantine, and scanned. But nothing showed up. Next day i get a pop up that says "some of the files suitable for analysis need your approval" or something like that. And there it was. So i submitted it. Question is, if i had deleted it from the quarantine, and was asked to submit it the next day, am I infected? Do i still have it?

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#2 boopme

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Posted 06 May 2011 - 09:59 PM

Hello,

If your antivirus encounters an infected file, there are generally three options available: clean, quarantine, or delete. If the wrong option is selected, the results can be catastrophic. And if it's a false positive, such a mishap can be even more frustrating and damaging.
As an example, if you instruct your antivirus software to delete all infected files, those that were infected by a true file infecting virus could also be deleted. This could impact the normal features and functionality of your operating system or programs you use. On the other hand, antivirus software can't 'clean' a worm or a trojan, because there is nothing to clean - the entire file IS the worm or trojan. Quarantine plays a nice middle ground, because it moves the file to safe storage under control of the antivirus program - so it can't harm your system - but it's there in case a mistake was made and you need to restore that file.



From and please read the rest of this short item. Clean, Quarantine, or Delete?

So Nod Quarantined it as it wanted to verify it. You deleted it and were fortunate as you had no adverse affect. So you did in reality Clean it. Possibility reoccurring.(the reason Nod wanted the sample)
Trj/Agent.NIF
It searches for and steals passwords saved for certain Windows services. It uses the infected computer to take malicious actions on other users. It terminates processes belonging to security tools, leaving the computer vulnerable to other malware attacks. It uses stealth techniques to avoid being detected by the user. It spreads , across the Internet, via mapped drives, through shared network resources.

You will need to chamge all yuor passwords after you are clean (and Nod replies to your submission).

If you scan again now will it find it again.

Let's also get a second opinion.
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

Edited by boopme, 06 May 2011 - 10:01 PM.

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#3 paranoid guy

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Posted 07 May 2011 - 01:02 AM

Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Database version: 6524

Windows 6.1.7600
Internet Explorer 8.0.7600.16385

5/6/2011 10:34 pm
mbam-log-2011-05-07 (00-59-36).txt

Scan type: Quick scan
Objects scanned: 152057
Time elapsed: 2 minute(s), 26 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)

Edited by paranoid guy, 07 May 2011 - 01:03 AM.


#4 boopme

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Posted 07 May 2011 - 09:39 AM

I think you are good to go. ESET is an excellent AV.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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