Cyber-Extortionists Targeting the Financial Sector Are Demanding Bitcoin RansomsA cybercriminal group going by the name “DD4BC” is blackmailing financial institutions, threatening to take down their customer websites unless they pay a hefty bitcoin ransom.
DD4BC – which stands for “DDoS for Bitcoin” (Distributed Denial of Service for Bitcoin) – has been targeting firms since mid-2014, so far evading international police forces.
http://www.bloomberg.com/news/articles/2015-09-09/bitcoin-ddos-ransom-demands-raise-dd4bc-profile