Trojan Sirefef-ZT

Viruses and worms
1

Hello,

Background shields kept reporting that they had blocked a trojan horse a few days ago and has been doing this consistently since. I believe that this trojan got onto my computer after visiting this dodgy website: www.crackinn.com/d/b/d/ghost+control/ or this one: http://pushtraffic.net/TDS/?wmid. Both seem malicious so I wouldn’t follow the link, the sticky just said that it would be a good idea to post where the malware came from. It is the File System Shield that is reporting the trojan. The file that the trojan seems to have integrated itself with is an application located here: C:\Windows\System32. The full name of the trojan is Threat: Win32: Sirefef-ZT [Trj].

Please tell me what logs I need to provide and how I can remove this malware it would be very much appreciated, thank you.

2

see Essexboys sticky guide on top in this section…

attch logs from AdwCleaner / Malwarebytes / OTL / aswMBR

3

Here they all are, apologies for not including originally.

4

And here’s the last two (because of the limit of 4 attatchments).

5

and aswMBR…

6

Let me know if this stops the alerts

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

https://dl.dropbox.com/u/73555776/OTL_Fix.GIF


:Files
C:\Windows\Installer\{3b99f81f-31d5-dbab-1bcf-87d0107a285a}
C:\windows\assembly\GAC_32\Desktop.ini
C:\windows\assembly\GAC_64\Desktop.ini

: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

http://img.photobucket.com/albums/v706/ried7/NSIS_disclaimer_ENG.png

http://img.photobucket.com/albums/v706/ried7/NSIS_extraction.png

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

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

7

I originally ran aswMBR but it didn’t complete because my computer bluescreened due to a fatal error. After restarting I started to run the repair with the script you provided, and that stopped after the computer restarted after a critical error was discovered. So I ran the same script with OTL in safe mode and it completed. There have been no more trojan’s detected by either Malwarebytes or Avast since the repair. I also ran the combofix. Then I re-ran aswMBR and it didn’t seem to detect anything malicious (I’ve included the log), so everything seemed good. However as I started writing this (most of it saved) my computer blue screened again which is rather worrying. Here’s what it said after my computer restarted:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 2057

Additional information about the problem:
BCCode: 109
BCP1: A3A039D8A27D3583
BCP2: B3B7465EF4FB7125
BCP3: FFFFF880009F45C0
BCP4: 0000000000000002
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\032413-23134-01.dmp
C:\Users\Tom\AppData\Local\Temp\WER-130806-0.sysdata.xml

8

Has the blue screen occurred since ? The logs appear clean now

9

Haven’t had one since, it all seems good; in which case you are an absolute hero, thank you very much for all your help.

10

I would like you to monitor it for a day or so, I will watch this thread

Subject to no further problems :slight_smile:

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

http://i1224.photobucket.com/albums/ee362/Essexboy3/Misc%20screen%20shots/CF_Uninstall-1.jpg

[]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.

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

https://dl.dropbox.com/u/73555776/disc%20clean.JPG

: 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:

http://img233.imageshack.us/img233/7729/mbamicontw5.gif
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:

11

Everything seems to be working great since yesterday, there’s been no problems. Thank you so so much :slight_smile:

12

My pleasure ;D