Back door Threat

Hi Guys,
I have being trying to make my system more secure by using sandboxie, firefox with these add-ons :
Keyscrambler
Adblock Plus
Better Privacy
FoxyProxy Standard
Ghostery
GoogleSharing
NoScript
Perspectives
WOT (web of trust)
HTTPS Everywhere

I also have Malwarebytes Anti Malware, ccleaner, Superspyware. and run regular updates on kaspersky (KIS).

But today whilst looking at the add -ons in f.fox I'm not sure but I think it's whilst I was in foxyproxy the KIS alam went off for a back door threat, It took me quite a while to clean it KIS stated my database was obsolete. I then rolled back my system and still had the infection, it took a couple more reboots and updating my KIS to get it back to good health.
I thought naively that my system was quite well protected.

Any feedback on this would be most appreciated.

thanks in advance.

chrism2

 

I would do some reading here: https://www.wilderssecurity.com/showthread.php?t=252253. I would also consider a program that is not signature based like DefenseWall or Sandboxie that isolates your Internet facing programs from your system.

 

Hi, so you were using Sandboxie when this happened ?

What infection did you have ? And what exactly happened ?

I would also check with MBAM & HMP