Author Topic: [Rtk] Infected by Win32:Sirefef-PL, need assistance to get rid of the virus.  (Read 6396 times)

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Henry44th

  • Guest
Hello,

I got infected by a maleware a few days ago, I use Windows 7 and Avast! Internet Security.
At the beginning, I got a message indicating that the windows security center was unable to start.
I tried to change the launching settings in services.msc, but the windows security center was not in the list.
I ran a scan with Avast and I found a Trojan (WIN32:Sirefef-ZT) in windows\System32\services.exe.
I could not repair so i typed in CLI:"sfc /scanfile=c:\windows\system32\services.exe" to replace it, and it worked just fine.

However, I was still unable to launch the security center, so I tried a Boot-Time scan. I found:
one rootkit Win32:Sirefef-PL in Windows\assembly\GAC_64\desktop.ini
one trojan (Win32:Sirefef-ZT) in Windows\winsxs\Temp\Pendingdeletes\DeleteMe.services.exe[...] (it seems to be the previously deleted file, so it looks quiet normal to find it here)
the same rootkit in Windows\assembly\GAC_32\desktop.ini.

I moved the first rootkit and the trojan to the chest (not so smart after all, as I had a little box in the bottom-right corner indicating my windows version was not genuine...),and I could not do anything with the last rootkit (GAC_32).

I ran a scan again and then I found:

one rootkit Win32:Sirefef-PL in Windows\assembly\GAC_32\desktop.ini

three errors: incorrect functions:
ProgrammeFiles\WindowsDefender\MsMpRes.dll
Windows\winsxs\amd_64_security-malware-windows-defender_..\MsMpRes.dll
Windows\winsxs\amd_64_security-malware-windows-defender_...\MsMpRes.dll

Many errors: the specified file path can not be found, for files which  filename extensions are: .manifest, .cat and.mum,  located in:
Windows\SoftWareDistribution\Download\...

Sadly I don't have any report file I can use, as I forgot to uncheck the "OK files" from the report file.

Now, I do not know how to get rid off that last rootkit, and how to delete properly the one in the GAC_64 file (which is in the virus chest for the moment), and  I would like to be sure that every threat has been removed from my computer.

I also tried to run a scan with malewarebytes and hitman pro but it did not find anything (on the contrary to Avast!)

Thanks for your help, just ask if you need any precision regarding this problem (note also that English is not my mother-tongue so I may have some difficulties with technical terms) 



Offline essexboy

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Hi there this is the latest variant

Download OTL  to your Desktop
Secondary link
  • Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.


  • Select All Users
  • Under the Custom Scan box paste this in
netsvcs
BASESERVICES
%SYSTEMDRIVE%\*.exe
/md5start
services.*
explorer.exe
winlogon.exe
Userinit.exe
svchost.exe
/md5stop
dir C:\ /S /A:L /C
CREATERESTOREPOINT


  • Click the Run Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
    • When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
    • Post  both logs

Henry44th

  • Guest
Hey, thanks a lot for your quick reply !

I ran OTF, here are the two resulting logs.
I'm waiting for further instructions.

Offline essexboy

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OK lets get at it, when the reparse points have been removed windows defender may slow your system down until we can repair it

Warning: this fix is specific to the user in this thread. No one else should follow these instructions as it may cause more harm than good. If you are after assistance, please start a thread of your own. 

  • Click on the Start button and in the search box, type Notepad and click on it
  • Copy (Ctrl+C) all of the text in the following box and paste (Ctrl+V) it into Notepad
Code: [Select]
fsutil reparsepoint delete "C:\Program Files\Windows Defender\fr-FR"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpAsDesc.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpClient.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpCmdRun.exe"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpCommu.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpEvMsg.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpOAV.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpRTP.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpSvc.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MSASCui.exe"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MsMpCom.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MsMpLics.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MsMpRes.dll"
fsutil reparsepoint delete "C:\Program Files\Windows Defender\MpAsDesc.dll"
CD \
DIR /S /A:L > %USERPROFILE%\Desktop\JunctionPoints.txt
START JunctionPoints.txt
EXIT

  • Go to File > Save As... and save it to your Desktop named fix.bat. Make sure you change the Save as type to All Files (*.*)
  • Locate fix.bat on your Desktop and right click then select Run as administrator
  • A log Junction.txt will be located on the desktop attach that
THEN

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
IE - HKU\S-1-5-21-1050467074-4020727131-2118715671-1000\..\SearchScopes\{C28835F2-332E-4218-9760-3A6D3B1D6248}: "URL" = http://search.conduit.com/ResultsExt.aspx?q={searchTerms}&SearchSource=4&ctid=CT3246942
FF - prefs.js..browser.startup.homepage: "http://search.conduit.com/?ctid=CT3246942&SearchSource=13"
FF - prefs.js..keyword.URL: "http://search.conduit.com/ResultsExt.aspx?ctid=CT3246942&SearchSource=2&q="
[2012/09/30 23:49:16 | 000,000,945 | ---- | M] () -- C:\Users\Henry\AppData\Roaming\mozilla\firefox\profiles\lyulpws7.default\searchplugins\conduit.xml
O3 - HKLM\..\Toolbar: (no name) - {027722dd-0f35-4d28-bfec-d3a657e925b3} - No CLSID value found.
O3 - HKU\S-1-5-21-1050467074-4020727131-2118715671-1000\..\Toolbar\WebBrowser: (no name) - {027722DD-0F35-4D28-BFEC-D3A657E925B3} - No CLSID value found.
O3 - HKU\S-1-5-21-1050467074-4020727131-2118715671-1000\..\Toolbar\WebBrowser: (no name) - {7FEBEFE3-6B19-4349-98D2-FFB09D4B49CA} - No CLSID value found.
O16 - DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} http://java.sun.com/update/1.6.0/jinstall-1_6_0_31-windows-i586.cab (Reg Error: Value error.)
[2013/05/24 14:18:11 | 000,004,608 | -HS- | M] () -- C:\Windows\assembly\GAC_32\Desktop.ini

:Files
C:\Windows\Installer\{5fdf3d4c-c670-fdda-5a2c-c9c1d5d2f5a2}

: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

FINALLY

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

Henry44th

  • Guest
I had to leave before I was able to run combofix.
Everything went smoothly, except for the antivirus disable: I disabled every Avast functions permanently, but combofix said Avast was still running. I double-checked this and ran Combofix anyway. I hope it will not prevent combofix to work properly...
I will attach the different outputs when I come back. Thanks again for your help !

Offline essexboy

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Combofix should function OK with Avast running as long as nothing was stopped by Avast (it shouldn't)

Henry44th

  • Guest
Well, I did everything as told and it seems it worked !

When I came back, ComboFix wasn't running anymore, and I couldn't find the log file. I rebooted my computer, and then ComboFix restarted and provided me with the ComboFix.txt log file. I experimented the little trouble you described with programmes being marked for deletion. I rebooted my PC once again, reactivated Avast! and then it was working well.
The Windows Security Center is started, and I can now find it in the service list when I launch services.msc. I just had troubles with my internet connection and had to change a few parameters in google chrome but I thing it is because I have to connect to the internet through my university network.

You'll fin attach: the log file after I ran the .bat file.
The log file after I ran OTL
And the log file after I ran ComboFix.

I'll run a scan with avast during the night to see if it still finds anything.
And I don't want to sound repetitive, but thanks again  :D

Henry44th

  • Guest
I ran Avast! and I found one infected file (which was in OTL moved files so I guess it's pretty normal) and three errors in dll files.
I moved the infected file to the chest. Here is the scan result.
What should I do now ?

Offline Pondus

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Quote
I ran Avast! and I found one infected file (which was in OTL moved files so I guess it's pretty normal)
yes....this folder will be gone when Essexboy remove OTL

Offline essexboy

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You may need to reinstall Windows Defender, unless it is working OK

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:

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. 

Clear Restore Points

Go Start > All Programmes > Accessories > System tools
Right click Disc Cleanup and select run as administrator
When it pops up at the first prompt select OK after it has done some calculations the tabs will appear
Select More Options tab
Press Sytem Restore and Shadow Copies Cleanup button



: Keep Java Updated :

WARNING: Java is the #1 exploited program at this time. The Department of Homeland Security recommends that computer users disable Java
See this article and this article.
I would recommend that you completely uninstall Java unless you need it to run an important software.
In that instance I would recommend that you disable Java in your browsers until you need it for that software and then enable it. (See How to diasble Java in your web browser and How to unplug Java from the browser)

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 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: