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Explorer.exe using high CPU, RAM, disk and network


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#1 Glombak

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Posted 24 December 2014 - 06:04 AM

Hello,

On the 22nd of December a person from my family was using the computer, and I suspect they clicked something on Facebook or some kind of advertisment.

Then, on the same day, I was playing a game - well known and I have been playing it for long time. Suddenly a black window appeared and the computer rebooted.

On the 23rd of December after I opened chrome and checked my facebook, chrome suddenly shuted down, and I could not turn it back on. Then, I started seeing that explorer.exe uses a lot of CPU, RAM, network (opening a lot of ports and connections - about 1000), and was uploading and downloading data on the disk.

I runned TDSS killer, and installed kaspersky internet security. With this I was able to block activity of explorer.exe, but as you know this app is vital on Windows 7.

Please advise what to do next.

Thank you

 



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#2 Glombak

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Posted 24 December 2014 - 10:46 AM

Please help, I have combofix log if you want I will upload it here. Also, what I spotted is that explorer.exe makes a lot of connections to shopping websites. Also, there are 2 processes explorer.exe - one is the normal one, and the other one is the one that is used by the virus.



#3 hamluis

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Posted 24 December 2014 - 03:48 PM

No DDS, HijackThis, or ComboFix logs - http://www.bleepingcomputer.com/forums/forum-167/announcement-45-no-dds-hijackthis-or-combofix-logs-should-be-posted-in-this-forum/.

 

Moved from Win 7 to Am I Infected forum.

 

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#4 noknojon

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Posted 24 December 2014 - 04:24 PM

Hello -

The information left should have included this, as Combofix logs belong only in one area.

 

Please follow the instructions in the Malware Removal and Log Section Preparation Guide starting at Step 6.

  • If you cannot complete a step, then skip it and continue with the next.
  • In Step 6 there are instructions for downloading and running DDS which will create two logs.

    NOTE -

  • As you had already scanned with ComboFix, do not rescan with it, but please post that log (if you still have it) as well.

When you have done that, Copy and Paste your logs in the Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT Here, for assistance by the Malware Response Team.

Start a new topic, give it a relevant title and post your log(s) along with a brief description of your problem, a summary of any anti-malware tools you have used and a summary of any steps that you have performed on your own. If you cannot produce any of the required logs, then still start the new topic and explain that you followed the Prep. Guide, were unable to create the logs, and describe what happened when you tried to create them. A member of the Malware Removal Team will walk you through, step by step, on how to clean your computer


After doing this, please reply back in this thread with a link to the new topic so we can close this one, to prevent others answering incorrectly.

 

Thank You -



#5 Glombak

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Posted 25 December 2014 - 12:25 PM

OK, I'm just  about to do the scan with DDS, but I have one question - should I turn off Kaspersky Internet Security 2015 (which provides me with firewall and blocks a lot of apps) before the scan? After I do that I will start a new topic with all the information requested.

Thank you

Merry Christmas :)



#6 Glombak

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Posted 26 December 2014 - 07:01 AM

Here I post the link to the new topic

http://www.bleepingcomputer.com/forums/t/561031/attacks-from-cwindowsexplorerexe/



#7 Glombak

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Posted 26 December 2014 - 07:12 AM

And one more thing, I used pendrive to transfer programs to the infected computer, I would really like to know whether the other computer could have bneen infected because of that. :( So far I have not seen any bad things with that one, except that it seemed to me that someone was remotedly turning on some programs in there (which seems to be something bad).



#8 noknojon

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Posted 26 December 2014 - 09:05 PM

We can check all of this when a helper is available

 

Thanks.



#9 boopme

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Posted 26 December 2014 - 09:13 PM

Now that your log is properly posted, you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a Malware Removal Team member, nor should you continue to ask for help elsewhere. Doing so can result in system changes which may not show it the log you already posted. Further, any modifications you make on your own may cause confusion for the helper assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.
From this point on the Malware Removal Team should be the only members that you take advice from, until they have verified your log as clean.
Please be patient. It may take a while to get a response because the Malware Removal Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT make another reply until it has been responded to by a member of the Malware Removal Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another MRL Team member is already assisting you and not open the thread to respond.
The current wait time is 1 - 5 days and ALL logs are answered.
If HelpBot replies to your topic, PLEASE follow Step One so it will report your topic to the team members.
To avoid confusion, I am closing this topic.
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