Need assistance removing win32:Sirefef-pl

Viruses and worms
1

Avast picked up win32:Sirefef-pl in a recent scan and I’ve been unable to get rid of it. It’s definitely effecting Windows as it won’t allow me to do a system restore. Any thoughts or assistance helping me clean this out? Thanks!

2

Hi,

Please download Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatibale with your system. If you are not sure which version applies to your system download both of them and try to run them.
Only one of them will run on your system, that will be the right version.

[*]Double-click to run it. When the tool opens click Yes to disclaimer.
[*]Under Optional Scan ensure “List BCD” and “Driver MD5” are ticked.
[*]Press Scan button.
[*]It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
[*]The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.

3

Sorry for the delay, logs attached. Thanks

4

Yup, malware has been confirmed.

  1. Please download ComboFix from here and save it to your Desktop.
    If you are unsure how ComboFix works please read this guide carefully.
    note: ComboFix must be downloaded to your Desktop.
  1. Temporarily disable your AntiVirus program.
    If you are unsure how to do this please read this or this Instruction.

Instructions how to disable avast:

[*]Right-click on the avast! icon in the lower right corner of the screen and choose Open Avast! User Interface.
[*]In the window that opens on the top right corner, click Settings.
[*]In a new window that opens, choose the option Troubleshooting, Uncheck Enable avast! self-defense, and click OK.
[*]=> Again, right-click on the avast! icon in the lower right corner of the screen and select avast! shield controls .
[*]In the menu that appears, choose Disable Permanently. When you are prompted to turn off security, click Yes.

Note: Do not forget to turn on this option after the cleaning.

  1. Run ComboFix. Click on I Agree!

ComboFix will check if there is a newer version of ComboFix available.
Click Yes if prompted to download.
ComboFix will display DISCLAIMER OF WARRANTY ON SOFTWARE.
Click Yes to allow ComboFix to continue.
If Recovery Console is not installed, ComboFix will offer download & installation.
Click Yes to allow ComboFix to install Recovery Console.
Note:Do not mouse-click Combofix’s window while it is running.
If you see a message like “Illegal operation attempted on a registry key that has been marked for deletion” just restart computer once more.

  1. When the tool is finished, it will produce a log report for you. (typical location: C:[b]ComboFix.txt[/b] )
    Attach log reports ( ComboFix.txt) back to topic.

----- next -----

Re-run FRST, ensure that options for Addition.txt has been ticked and press Scan button.
Post here fresh created logs.

5

ComboFix and Farbar logs attached. Thanks again for your assistance.

6

Hmm … not quite well. Parts of the rootkit are still loaded. We’ll have to repeat the procedure

  1. I’ll need you to re-run ComboFix as you did before and post me fresh created Combofix.txt logreport.

----- next -----

  1. Re-run FRST, just hit Scan button and post me fresh created FRST.txt logreport.
7

Hopefully second time will be the charm…

8

It’s a charm. CF job has been done successfully.

FRSTScript

  1. Open notepad and copy/paste the text present inside the code box below.
    To do this highlight the contents of the box and right click on it. Paste this into the open notepad.

NOTICE: This script was written specifically for this user, for use on that particular machine. Running this on another machine may cause damage to the operating system

START
File: c:\windows\system32\icaapi.dll
Winsock: Catalog5 01 %SystemRoot%\System32\mswsock.dll [223232] (Microsoft Corporation) ATTENTION: The LibraryPath should be "%SystemRoot%\system32\NLAapi.dll"
C:\Users\Wayne\gotomypc_635.exe
END

  1. Save notepad as fixlist.txt
    NOTE. It’s important that both files, FRST and fixlist.txt are in the same location or the fix will not work.

  2. Run FRST/FRST64 and press the Fix button just once and wait.
    If the tool needed a restart please make sure you let the system to restart normally and let the tool completes its run after restart.
    The tool will make a log on the Desktop (Fixlog.txt). Please attach it to your reply.

Note: If the tool warned you about the outdated version please download and run the updated version.

----- next -----

I wanna check your services to confirm whether CF done job successfully. We will run FSS tool.

Please download Farbar Service Scanner and run it on the computer with the issue.
[*]Make sure the following options are checked:

[*]Internet Services
[*]Windows Firewall
[*]System Restore
[*]Security Center/Action Center
[*]Windows Update
[*]Windows Defender

[*]Press “Scan”.
[]It will create a log (FSS.txt) in the same directory the tool is run.
[]Please copy and paste the log to your reply.

9

Here ya go and thanks again so much for your help. You guys are awesome!

10

Please download Services Repair tool, available here, and save it to your Desktop. Right click on it and select Run As Administrator, follow the prompts. It should reboot when it finishes. If not reboot it yourself.
http://kb.eset.com/library/ESET/KB%20Team%20Only/Malware/ServicesRepair.exe

Tell me how’s your computer behavior now?

11

Magna, sorry for the delay, was away on business. Your fixes seem to have fixed everything I was having issues with. Thanks again for all of your help!