http://www.h-online.com/security/news/item/BKA-trojan-goes-on-an-international-holiday-1668547.html
The family of malware known as the BKA trojan has increasingly established an international presence.
The trojan is usually introduced to the system through unpatched security holes in browser plugins such as Flash, Java or Adobe Reader.
According to the FBI, many victims actually pay up and only call for help when the trojan does not unlock their computer.