Win32 Sirefef-ZT trojan - Please help me get rid of this!

[elShankos]

Hi there,

I have been hunting for a way to fix this problem on my PC.  The avast scan found a bunch of problems - please see attached scan results - and I deleted what I could but I'm now stuck with this virus.  I've been reading up on this problem and all the fixes appear to be PC specific so could someone please help me out for my PC?
Any help would be much appreciated!

Stephan

[essexboy]

For sure, follow the steps in this thread and attach the logs here  http://forum.avast.com/index.php?topic=53253.0

[elShankos]

Hi, 

OK, so here are all the logs.

Thanks for helping me out!
Stephan

[essexboy]

OK lets kill it

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

Run OTL

• Under the Custom Scans/Fixes box at the bottom, paste in the following
  
  
  

Code: [Select]

:OTL
[2012/12/04 22:04:30 | 000,004,608 | -HS- | M] () -- C:\Windows\assembly\GAC_32\Desktop.ini
[2012/12/04 22:04:30 | 000,006,144 | -HS- | M] () -- C:\Windows\assembly\GAC_64\Desktop.ini

:Files
C:\Windows\Installer\{56c61d7c-b676-c3bd-2401-7e1f98b81da3}

:Commands
[resethosts]
[emptytemp]
[CREATERESTOREPOINT]
[Reboot]

• Then click the Run Fix button at the top
  
• Let the program run unhindered, reboot the PC when it is done
• Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.

THEN

Download and Install Combofix
 
Download ComboFix from one of the following locations:
Link 1
Link 2
 
VERY IMPORTANT !!! Save ComboFix.exe to your Desktop
 
* IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here

• Double click on ComboFix.exe & follow the prompts.
  
• Accept the disclaimer and allow to update if it asks

• When finished, it shall produce a log for you.
• Please include the C:\ComboFix.txt in your next reply.[/b]
  

Notes:
1. Do not mouse-click Combofix's window while it is running. That may cause it to stall.
2. Do not "re-run" Combofix. If you have a problem, reply back for further instructions.
3.  If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.


Please make sure you include the combo fix log in your next reply as well as describe how your computer is running now

[elShankos]

Hi there,

Please see the attached 2 logs.  So far the avasti lady has stopped harassin me about a virus being detected which is a good start!  Otherwise my PC seems just fine / the same.

Thanks!
Stephan

[essexboy]

That looks good .. Any further problems ?

[elShankos]

Nope - thats fantastic!  Thanks so much for helping me out!

SHould I uninstall that assortment of small programs perhaps or just keep them?

Thanks!

[essexboy]

Nope let me do it for you

Subject to no further problems   

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems 

Now the best part of the day ----- Your log now appears clean  :thumbsup:

A good workman always cleans up after himself so..The following will implement some cleanup procedures as well as reset  System Restore points:

Run AdwCleaner and press uninstall
Delete aswMBR from the desktop

Remove ComboFix

• Hold down the Windows key + R on your keyboard. This will display the Run dialogue box
  
• In the Run box, type in ComboFix /Uninstall
   (Notice the space between the "x" and "/")
  then click OK
  
  
  
  
• Follow the prompts on the screen
• A message should appear confirming that ComboFix was uninstalled

Run OTL and hit the cleanup button.  It will remove all the programmes we have used plus itself. 

We will now confirm that your hidden files are set to that, as some of the tools I use will change that

• Click Start.
• Open My Computer.
• Select the Tools menu and click Folder Options.
• Select the View Tab.
• Under the Hidden files and folders heading select Do not show hidden files and folders.
  
• Click Yes to confirm.
• Click OK.

   Your Java is out of date.
Older versions have vulnerabilities that malware can use to infect your system.
Please follow these steps to remove older version of Java components and upgrade the application.

 Upgrading Java:

• Go to this site  and click Do I have Java
  
• It will check your current version and then offer to update to the latest version

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

Malwarebytes.

Update and run weekly to keep your system clean

Download and install FileHippo update checker and run it monthly it will show you which programmes on your system need updating and give a download link

If you use on-line banking then as an added layer of protection install Trusteer Rapport

It is critical to have both a firewall and anti virus to protect your system and to keep them updated. To keep your operating system up to date visit

• Microsoft Windows Update

To learn more about how to protect yourself while on the internet read our little guide  How did I get infected in the first place ?Keep safe  :wave:

[elShankos]

Hi there,

So I took a little while to get this done - I've cleaned up everything.  I just couldn't figure out how to hide the files for Windows 7.
I just have one more question - I thought these random folders which appeared on my C drive were part of a virus but they are still here - I've attached a screenshot of what I get when I try and delete the folder.  I've tried just deleting these folders but they say they are somehow protected even though this is my PC and I have my own user settings as administrator - something weird is going on here! Or this is somehow part of my system files and needs to be kept.
If you have any ideas Id really appreciate some feedback!

Many thanks,
Stephan

[essexboy]

That folder is part of windows updates and as such are system protected

[elShankos]

Ok thanks a lot!

And thanks again for all your help!