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Infected with Win32\Sirefef, PC in rebooting loop


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#1 ajnurcombe

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Posted 22 August 2012 - 04:23 AM

Good Morning

As of last night AVG Anti Virus has been detecting the threat - Win32\Sirefef. Unfortunately since this time I have also started receiving the error message "Windows has encountered a critical error and must restart". AVG has also pointed to C:\Windows\System32\Services.exe.

The operating system is Vista 32 bit. Apologies for the lack of information and not posting the DDS and GMER logs but the PC will not stay powered on long enough to run any logging,scan or program. I get a maximum of 90 seconds from windows logon before I receive the message "Windows has encountered a critical error and must restart". Even without logging on to Windows, the PC still reboots.

I have tried booting into Safe Mode (with and without Networking) but still have the same issue.Another point to note is that the Windows firewall has been disabled and would not let me enable it again. As a rule I would have re-installed Windows Vista but this is not an option on this PC.

I have never encountered a virus like this.I find it intriguing and frustrating! So here I am asking the experts, your advice would be greatly appreciated.

Many Thanks

Ashley

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#2 CatByte

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Posted 24 August 2012 - 04:03 PM

Please do the following:

download Farbar Recovery Scan Tool and save it to a flash drive.

Plug the flashdrive into the infected PC.

Enter System Recovery Options.

To enter System Recovery Options from the Advanced Boot Options:
  • Restart the computer.
  • As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
  • Use the arrow keys to select the Repair your computer menu item.
  • Choose your language settings, and then click Next.
  • Select the operating system you want to repair, and then click Next.
  • Select your user account and click Next.
To enter System Recovery Options by using Windows installation disc:
  • Insert the installation disc.
  • Restart your computer.
  • If prompted, press any key to start Windows from the installation disc. If your computer is not configured to start from a CD or DVD, check your BIOS settings.
  • Click Repair your computer.
  • Choose your language settings, and then click Next.
  • Select the operating system you want to repair, and then click Next.
  • Select your user account an click Next.
On the System Recovery Options menu you will get the following options:
Startup Repair
System Restore
Windows Complete PC Restore
Windows Memory Diagnostic Tool
Command Prompt
[*]Select Command Prompt
[*]In the command window type in notepad and press Enter.
[*]The notepad opens. Under File menu select Open.
[*]Select "Computer" and find your flash drive letter and close the notepad.
[*]In the command window type e:\frst.exe and press Enter
Note: Replace letter e with the drive letter of your flash drive.
[*]The tool will start to run.
[*]When the tool opens click Yes to the disclaimer.
[*]Place a check next to List Drivers MD5 as well as the default check marks that are already there
[*]Press Scan button.
[*]FRST will let you know when the scan is complete and has written the FRST.txt to file, close out this message, then type the following into the search box:
services.exe
[*]now press the search button
[*]when the search is complete, search.txt will also be written to your USB
[*]type exit and reboot the computer normally
[*]please copy and paste both logs in your reply.(FRST.txt and Search.txt)[/list]

Microsoft MVP - 2010, 2011, 2012, 2013, 2014, 2015


#3 CatByte

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Posted 01 September 2012 - 01:32 PM

Due to the lack of feedback, this topic is now closed.In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days. Please include a link to your topic in the Private Message. Thank you.

Microsoft MVP - 2010, 2011, 2012, 2013, 2014, 2015





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