Troubles with Trojan:JS/Medfos.B

I am using Windows 7 running Internet Explorer 9. I have had this same issue with "Trojan:JS/Medfos.B". I have been made aware of the effects of the trojan having been through this experience myself. Let me give you the source of where this trojan is coming from. According to Microsoft Security Essentials on my Lenovo laptop, it states that the source of "Trojan:JS/Medfos.B" is within the command line of the following: file:C:\Users\Owner\AppData\Local\chromeupdate.crx. I have made numerous attempts to find out what I must do to remove this threat. I have even clicked the "Remove All" button when I have Microsoft Security Essentials opened. I have even downloaded the latest security and virus/malware definitions. But the results show nothing. It only stops the progression of the trojan, not completely remove the problamatic trojan and it's activity of spawning malicious pop-ups when I attempt a search using any search engine. What do you advise me to do in the removal of this trojan?
 

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Last updated May 16, 2018 Views 9,026 Applies to:
Answer
Answer

Forum user DavidTGriffin credits Hitman Pro with stopping this malware.

See the following thread: http://answers.microsoft.com/en-us/protect/forum/mse-protect_scanning/trouble-removing-tojanjsmedfosb-from-my-system/7eeb386c-4b8e-4204-8292-d20b0f0d27bb

 

Good luck...


Tried it - didn't work.


Normally one would think if it worked on DavidTGriffin's computer it should work (key word is should) on other computers with the same infection.  I'm sure you're more than frustrated.  Almost sounds like a rootkit, doesn't it?

 

Did you try an offline scanner?

 

Have you considered seeking assistance from a free malware-removal forum:

http://www.bleepingcomputer.com

http://discussions.virtualdr.com/forumdisplay.php?f=71

http://www.dslreports.com/forum/cleanup

http://www.daniweb.com/hardware-and-software/microsoft-windows/viruses-spyware-and-other-nasties/64

http://www.geekstogo.com/forum/forum/118-security/

 

 

Good luck...

 


OK, I missed a key point which was to uninstall Java. When I did this, MSE detected a different trojan in the Roaming folder and in a couple of registry keys. Once these were cleaned, the problem (for the time being) appears to have gone away.

No need for Hitman etc..

Uninstall java and let MSE detect the real cause of the problem.

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Answer
Answer

Forum user DavidTGriffin credits Hitman Pro with stopping this malware.

See the following thread: http://answers.microsoft.com/en-us/protect/forum/mse-protect_scanning/trouble-removing-tojanjsmedfosb-from-my-system/7eeb386c-4b8e-4204-8292-d20b0f0d27bb

 

Good luck...

MVP Consumer Security 2014-2016
Windows Insider MVP 2016-2018

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