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Possibly infected with a backdoor trojan?


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#1 rouschel

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Posted 13 July 2014 - 07:28 AM

Alright, here's the scoop.  I think my computer is infected with some kind of backdoor trojan or worm. 

 

The symptoms:  Computer will freeze for a few seconds every few minutes, making typing and moving the mouse around very annoying.  The mouse will "jump" on the screen, making it difficult to click on much of anything.  It doesn't seem to do this all of the time, but when it does act up, it is very frustrating.  Windows Explorer or Chrome will pop up out of nowhere, even though I am using Firefox.  I have Explorer and Chrome installed as well, but a new window will pop up even though I did not open one. My CPU seems to be cranking up a lot lately and isn't able to handle video processing like it used to, but the computer is a couple of years old and may just need updating.

 

Computer Info: This computer is a Windows 7 Home Premium, 64 bit.  I'm not sure if you need to know my processor and all that, but I can tell you if you do.

 

Possibilities: My husband likes to install a lot of MMORPG's and try them out. I'm concerned that he may have downloaded malicious files in the process.  We have noticed that these things started getting worse when we installed Spotify to play music.  We have since uninstalled it, but the problems still persist.

 

I have run several anti-virus and anti-malware scans (Microsoft Security Essentials and MalwareBytes) but they didn't show any abnormalities.

 

Thanks in advance for all of your help and just let me know what else you need. :)


Edited by rouschel, 13 July 2014 - 07:51 AM.


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#2 wpgwpg

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Posted 13 July 2014 - 10:29 AM

 The problem of things jumping around sounds like a touchpad problem.  Is this computer a laptop?  If so, I'd get a mouse, plug it into a USB port and disable that touchpad.  My opinion of touchpads is that they're masochistic devices designed by evil demons.   :bounce:  If you suspect malware, download Malwarebytes from here:

 http://www.bleepingcomputer.com/download/malwarebytes-anti-malware/ , get it up to date, and do a scan.  When it finishes, click Quarantine All and follow the onscreen directions.

 

Good luck.


Everyone with a computer should back his system up to an external hard drive regularly.  :thumbsup:

#3 rouschel

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Posted 14 July 2014 - 09:51 AM

Thanks wpgwpg, but I am using a desktop computer - something I probably should have specified.  I did run MalwareBytes, as I mentioned in my post, but it came back with nothing. I am just concerned about the Explorer window popping up without a prompt.  I'm thinking, from doing some research, that it is the svchost trojan.  Thankfully, MyBleepingComputer has some instructions I can follow.  Thanks again :)



#4 wpgwpg

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Posted 14 July 2014 - 10:39 AM

 Here're three programs you can download from BC and try.  Go to http://www.bleepingcomputer.com/download/adwcleaner/ and download AdwCleaner, Junkware Removal Tool, and TDSSKiller and give them a shot.

 

Good luck.


Everyone with a computer should back his system up to an external hard drive regularly.  :thumbsup:

#5 boopme

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Posted 14 July 2014 - 12:27 PM

Before you go on why do you think it is a back door?
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