Avast WEBforum
Other => Viruses and worms => Topic started by: kykiske on July 23, 2012, 12:40:21 AM
-
Evening,
I've picked up some sort of 'Win32:Sirefef-PL [Rtk]' infection. Between Malawarebytes, Tdsskiller, and Avast! I can usually rid myself of anything that comes up, but this one seems nasty. So I would appreciate some help.
Questions answered in order from the sticky.
1) Blocked first as Infection: Win32:Downloader-PKU [Trj]. Win32:Sirefef-PL [Rtk] detected in scanning. Can be deleted but returns as Trojan Horse Block repeatedly.
2) Unsure. Using Chrome. Browsing Tour de France streams.
3) Possibly fake flash install.
5) Infection: Win32:Downloader-PKU [Trj]. Object: c:\Windows\Installer\...\80000032.@. Action: Moved to chest. Process: C:\Windows\System32\services.exe
Thanks in advance for your help.
James
-
follow this guide and attach (not copy and paste) logs from Malwarebytes / OTL / aswMBR
http://forum.avast.com/index.php?topic=53253.0
when done a malware remover will be notified: It may take sveral hours before one arrive so be patient
-
Hi,
I will look these over when they arrive. :)
-
Thanks for your speedy replies.
Logs attached.
Just so you know, I won't be back with my machine for another 12-14 hours today.
-
OTL / aswMBR logs are coming...
-
OTL logs
-
MBR logs attached.
-
Download Combofix from either of the links below, and save it to your desktop.
Link 1 (http://download.bleepingcomputer.com/sUBs/ComboFix.exe)
Link 2 (http://www.forospyware.com/sUBs/ComboFix.exe)
**Note: It is important that it is saved directly to your desktop**
If you get a message saying "Illegal operation attempted on a registry key that has been marked for deletion", please restart your computer.
--------------------------------------------------------------------
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 (http://forums.whatthetech.com/How_Disable_your_Security_Programs_t96260.html&pid=494216#entry494216)
--------------------------------------------------------------------
Right-Click and Run as Administrator on ComboFix.exe & follow the prompts. When finished, it will produce a report for you.
- Please post the C:\ComboFix.txt for further review.
-
Thanks for your continued assistance.
Combofix downloaded direct to desktop.
-
(should have added I'll post reports later - after 5pm BST)
-
Not a problem. No hurry. :)
-
One quick question, am I advised to turn wifi (and hence internet) off before disabling antivirus/antispyware software and launching ComboFix? My instinct would be to turn off wifi to stop anything else getting in whilst antivirus/antispyware software is disabled. But I'm, of course, happy to follow you lead on this.
-
You should just disable your antivirus program and firewall while running ComboFix. Don't worry about the internet. :)
-
Okay. Thanks.
-
No problem.
-
I have right-clicked and run ComboFix as an admin, but, as far as I can see, ComboFix is not returning a .txt report.
Please advise.
-
To update, I've tried again and this time ComboFox rebooted the machine with the status bar at just over halfway (rather than just going to the end and disappearing), and is now running a process on a blue screen (which seems more promising).
-
Ok just let it run... :)
-
We are done! ComboFix report attached as promised.
-
Hi,
Malwarebytes
I see that you have Malwarebytes already on your computer. Please open Malwarebytes, update it and then run a Quick Scan. Save the log that is created for your next reply.
----------
Please run a free online scan with the ESET Online Scanner (http://www.eset.com/onlinescan/)
Note: You will need to use Internet Explorer for this scan[/i]- Tick the box next to YES, I accept the Terms of Use
- Click Start
- When asked, allow the ActiveX control to install
- Click Start
- Make sure that the options Remove found threats is NOT selected and the option Scan unwanted applications is selected.
- Click Scan (This scan can take several hours, so please be patient)
- Once the scan is completed, you may close the window
- Use Notepad to open the logfile located at C:\Program Files\EsetOnlineScanner\log.txt
- Copy and paste that log as a reply to this topic
----------
Download Security Check by screen317 from here (http://screen317.spywareinfoforum.org/SecurityCheck.exe) or here (http://screen317.changelog.fr/SecurityCheck.exe).- Save it to your Desktop.
- Double click SecurityCheck.exe and follow the onscreen instructions inside of the black box.
- A Notepad document should open automatically called checkup.txt; please post the contents of that document.
----------
-
On it now.
-
As promised...
MWB log attached.
log.txt report from ESET Online Scanner attached.
checkup.txt from Security Check attached.
Thanks for sticking with this.
-
Hi,
How is your system running?
-
Everything seems okay.
Avast is reporting no attacks and the system is running smoothly.
Two niggles:
1) I'm getting a 'csc.exe. Application unable to start correctly' when I shut down and/or restart
2) I recall that the ESET Online Scanner picked up three infections. Have those now been cleared?
-
I recall that the ESET Online Scanner picked up three infections. Have those now been cleared?
The log you gave me did not show anything?
-
Okay. I shall rerun and resend.
-
Quick update. I'm 49% through Step 3 of 4 of the ESET Online Scanner, and below the scan progress area it says:
'Current scan result:
Threats found!
Win64/Patched.B.Gen trojan
a variant of Win32/Sirefef.FD trojan
Win64/Agent.BA trojan'
I'm pretty sure this is the same warning I saw last night which you say did not appear on the log.txt I sent yesterday.
I'll let the scan finish and send you the fresh log.
Thanks once again for your persistence.
-
Okay. This is odd.
ESET finished and said their were threats (sorry closed the window, don't remember precisely what it said). But no new log was generated at C:\Program Files (x86)\ESET\ESET Online Scanner\log.txt. The file there is the same one I sent last night (time stamped 24/07/2012 22:01).
Thoughts?
-
Do you remember seeing them in Qoobox or referenced as being there?
-
Qoobox?
-
Did it look like the file that ESET found was located at C:\Qoobox\Quarantined Files\...
-
I don't know. It merely said exactly what I typed in before.
Is there a way to tell if it was finding files in C:\Qoobox\Quarantined Files\...?
-
Well....I think that it would be best to run ESET again and be sure to save the log to be attached here. We can look in Qoobox and see files but that does not tell me what ESET is seeing.
-
Okay. Shall do. Hopefully it will generate a log this time! :)
-
:)
-
ESET scan hasn't finished yet, but that 'Threats found!' message I pasted before appears towards the end of scanning the C:\Qoobox\... or at the beginning of scanning C:\Recovery\...
I'll paste the log when the scan finishes.
-
Sounds good.
-
I've copied the ESET scan results below (Target - Threat):
C:\Qoobox\Quarantine\C\Windows\Installer\{c7cd7b54-64d3-6156-0a39-3a1703d78058}\U\00000008.@.vir - Win64/Agent.BA trojan
C:\Qoobox\Quarantine\C\Windows\Installer\{c7cd7b54-64d3-6156-0a39-3a1703d78058}\U\80000032.@.vir - a variant of Win32/Sirefef.FD trojan
C:\Qoobox\Quarantine\C\Windows\System32\services.exe.vir - Win64/Patched.B.Gen trojan
I presume this is good news. What is my next move?
-
Yep that is good news. How is your system running?
-
With no problems.
-
I think what I should say is very well. Thank you.
-
Great! Good to hear! :)
--------
Providing there are no other malware related problems...
IT APPEARS THAT YOUR LOGS ARE NOW CLEAN :D SO LETS DO A COUPLE OF THINGS TO WRAP THIS UP!! :D
This infection appears to have been cleaned, but I can not give you any absolute guarantees. As a precaution, I would go ahead and change all of your passwords as this is especially important after an infection.
----------
The following will implement some cleanup procedures as well as reset System Restore points:
Click Start > Run and copy/paste the following text into the Run box as shown and click OK.
Combofix /Uninstall
(Note: There is a space between the ..X and the /U that needs to be there.)
(http://i1224.photobucket.com/albums/ee380/jeffce74/CF.jpg)
----------
Clean up with OTL:
- Right-click and Run as Administrator OTL.exe to start the program.
- Close all other programs apart from OTL as this step will require a reboot
- On the OTL main screen, press the CLEANUP button
- Say Yes to the prompt and then allow the program to reboot your computer.
----------
Any of the logs that you created for use in the forums or remaining tools that have not yet been removed can be deleted so they aren't cluttering up your desktop.
If you didn't already have it I would keep Malwarebytes AntiMalware though.
Here are some tips to reduce the potential for spyware infection in the future:
1. Internet Explorer. Even if you don't use it as your main browser it should be kept up-to-date because that is the browser Windows uses for updates.
Make your Internet Explorer more secure - This can be done by following these simple instructions:
- From within Internet Explorer click on the Tools menu and then click on Options.
- Click once on the Security tab
- Click once on the Internet icon so it becomes highlighted.
- Click once on the Custom Level button.
- Change the Download signed ActiveX controls to Prompt
- Change the Download unsigned ActiveX controls to Disable
- Change the Initialize and script ActiveX controls not marked as safe to Disable
- Change the Installation of desktop items to Prompt
- Change the Launching programs and files in an IFRAME to Prompt
- Change the Navigate sub-frames across different domains to Prompt
- When all these settings have been made, click on the OK button.
- If it prompts you as to whether or not you want to save the settings, press the Yes button.
- Next press the Apply button and then the OK to exit the Internet Properties page.
2. Enable Protected Mode in Internet Explorer. This helps Windows Vista users stay more protected from attack by running Internet Explorer with restricted privileges as well as reducing the ability to write, alter or destroy data on your system or install malicious code. To make sure this is running follow these steps:- Open Internet Explorer
- Click on Tools > Internet Options
- Press Security tab
- Select Internet zone then place check next to Enable Protected Mode if not already done
- Do the same for Local Intranet, Trusted Sites and Restricted Sites and then press Apply
- Restart Internet Explorer and in the bottom right corner of your screen you will see Protected Mode: On showing you it is enabled.
3. Use and update an anti-virus software - I can not overemphasize the need for you to use and update your anti-virus application on a regular basis. With the ever increasing number of new variants of malware arriving on the scene daily, you become very susceptible to an attack without updated protection.
4. Firewall
Using a third-party firewall will allow you to give/deny access for applications that want to go online. Without a firewall your computer is susceptible to being hacked and taken over. Simply using a firewall in its default configuration can lower your risk greatly. A tutorial on firewalls can be found here[/color] (http://www.bleepingcomputer.com/forums/tutorial60.html). **There are firewalls listed in this tutorial that could be downloaded and used but I would personally only recommend using one of the following two below:
Online Armor Free (http://download.cnet.com/Online-Armor-Free/3000-10435_4-10426782.html)
Agnitum Outpost Firewall Free (http://download.cnet.com/Agnitum-Outpost-Firewall-Free/3000-10435_4-10913746.html)
5. Make sure you keep your Windows OS current. Windows XP users can visit Windows update (http://v4.windowsupdate.microsoft.com/en/default.asp) regularly to download and install any critical updates and service packs. Windows Vista/7 users can open the Start menu > All Programs > Windows Update > Check for Updates (in left hand task pane) to update these systems. Without these you are leaving the back door open.
6. WOT (http://www.mywot.com/) (Web of Trust) As "Googling" is such an integral part of internet life, this free browser add on warns you about risky websites that try to scam visitors, deliver malware or send spam. It is especially helpful when browsing or searching in unfamiliar territory. WOT's color-coded icons show you ratings for 21 million websites, helping you avoid the dangerous sites. WOT has an add-on available for Firefox, Internet Explorer as well as Google Chrome.
7.Finally, I strongly recommend that you read TonyKlein's good advice So how did I get infected in the first place? (http://www.geekstogo.com/forum/index.php?autocom=custom&page=How_did_I)
Please reply to this thread once more if you are satisfied so that we can mark the problem as resolved.
-
Okay. All done. Thank you very much for your assistance.
I am satisfied that the problem is resolved.
-
You are more than welcome! Glad that I could help. :)
-
Well it is tremendous to know that there are people out there with the patience and persistence to help folk such as I resolve virus problems. Bravo!
-
Thank you for the kind words. :)