Scammers, intruders and other miscreants often aim to conceal their actions from forensic investigators.When analyzing an IT support scam, I interacted with the person posing as the help desk technician. He brought up a web page on my lab system to present payment form, so I'd supply my contact and credit card details.He did this in a surprising manner, designed to conceal the destination URL.
more here.........http://digital-forensics.sans.org/blog/2015/03/24/hide-from-browser-forensics
more here.........http://digital-forensics.sans.org/blog/2015/03/24/hide-from-browser-forensics