What is PC Health Kit?
The Malwarebytes research teamdetermined that PC Health Kit is a fake anti-malware application. These so-called “rogues” use intentional false positives to convince users that their systems have been compromised. Then they try to sell you their software, claiming it will remove these threats. In extreme cases the false threats are actually the very trojans that advertise or even directly install the rogue.
see: http://forums.malwarebytes.org/index.php?showtopic=127755
The ‘Your computer has been locked’ Ransomware is a computer infection that prevents you from accessing your Windows desktop, files, or applications until you pay a $300 ransom to the malware developers. This ransomware pretends to be a lock screen placed on your computer by the Department of Justice, Department of Homeland Security, and the FBI that states child pornography was detected on your computer. It then proceeds to state that you will face a $250,000 fine imprisonment from 4 to 30 years unless you pay a fine in the amount of $300. In reality, this is just a computer infection and not a legitimate government message, so you should ignore anything that it requests you to do.
As explained in this great blog article and site, this infection will also check your web browser history to see if you accessed certain sites. If you have, it will include the list of matched web sites in the lock screen to further scare you into thinking that your activities have been monitored. Once again, this is just the infection accessing your browser history and you do not have to be concerned about it.
http://www.bleepingcomputer.com/virus-removal/remove-your-computer-has-been-locked-ransomware
Some worrying malware sites to avoid
fxpromocode.com
turiserv.com (sharing IP with findsovil.com, humeserv.com, orgitom.com, petohost.com, tovohost.com, vodistat.com)
doxastat.com (previously at 94.242.221.30, shared IP with turiserv.com etc)
flemboyant.com (Registrar: Center of Ukranian Internet Names)
thebestofferyou.com
ezmovetucson.com
