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False Positive or Actual Virus


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#1 Mykard

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Posted 11 March 2010 - 08:57 PM

Hey, I just recently installed avira anti virus in addition to having nortons 2003. Everythings been ok except for when i do a full scan. it gives me the message that it found 'TR/Mygot.B.8' in C:\WINDOWS\Temp\ , this alert continually appears with a file in the same directory but with a different name, i know this is something that viruses do, but upon disconnecting my pc from the internet and navigating to the directory the file seems to be deletable. it doesnt give me the alert until a do a full scan. ive checked, the file isnt there when avira is off. online or offline. is this a compatibility problem with nortons, or a more serious problem ?

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#2 boopme

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Posted 12 March 2010 - 12:18 AM

Hello, it may be an issue having 2 AV's running and conflicting,try again after disabling one.

Let's also get another opinion.

Next run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware (v1.44) 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.

Edited by boopme, 12 March 2010 - 12:19 AM.

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#3 Mykard

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Posted 27 March 2010 - 11:58 AM

Malwarebytes' Anti-Malware 1.41
Database version: 3223
Windows 5.1.2600 Service Pack 2

3/22/2010 2:15:09 PM
mbam-log-2010-03-22 (14-15-09).txt

Scan type: Full Scan (C:\|D:\|)
Objects scanned: 99940
Time elapsed: 59 minute(s), 28 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 10
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:
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{19127ad2-394b-70f5-c650-b97867baa1f7} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{43bf8cd1-c5d5-2230-7bb2-98f22c2b7dc6} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{494e6cec-7483-a4ee-0938-895519a84bc7} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{c48635ad-d6b5-3ee4-aaa2-540d5a173658} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{4776c4dc-e894-7c06-2148-5d73cef5f905} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\S-1-5-18\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{19127ad2-394b-70f5-c650-b97867baa1f7} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\S-1-5-18\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{43bf8cd1-c5d5-2230-7bb2-98f22c2b7dc6} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\S-1-5-18\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{494e6cec-7483-a4ee-0938-895519a84bc7} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\S-1-5-18\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{c48635ad-d6b5-3ee4-aaa2-540d5a173658} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_USERS\S-1-5-18\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{4776c4dc-e894-7c06-2148-5d73cef5f905} (Backdoor.Bot) -> Quarantined and deleted successfully.

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)


Sorry it took me so long to post this, but after un-installing nortons, the detection no longer came up during the scan but every now and then avira is giving me reports of something called TR/Crypt.XPACK.Gen it detected a few exe files, but after a scan its seemed to remove them all and ive had no problems since

#4 boopme

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Posted 27 March 2010 - 09:43 PM

Hello, no problem with the time but we have some here...
Mbam needs to be rerun..and updated. We also have Backddor trojanss/Bots,so I need to tell you this.

One or more of the identified infections is a backdoor trojan.

This allows hackers to remotely control your computer, steal critical system information and download and execute files.

I would counsel you to disconnect this PC from the Internet immediately. If you do any banking or other financial transactions on the PC or if it should contain any other sensitive information, please get to a known clean computer and change all passwords where applicable, and it would be wise to contact those same financial institutions to apprise them of your situation.

Though the trojan has been identified and can be killed, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of trojan, the best course of action would be a reformat and reinstall of the OS. Please read these for more information:

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
When Should I Format, How Should I Reinstall

We can still clean this machine but I can't guarantee that it will be 100% secure afterwards. Let me know what you decide to do.



Rerun MBAM (MalwareBytes) like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select FULL scan and scan (normal mode).
After scan click Remove Selected, Post new scan log and Reboot into normal mode.
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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