DD4BC Extortionist Group Launched Over 140 DDoS Attacks: Akamai
Akamai Technologies’ Prolexic Security Engineering and Response Team (PLXsert) has published a report detailing the activities of DD4BC, an extortionist group that has launched distributed denial-of-service (DDoS) attacks against numerous organizations and demanded Bitcoin payments to stop the attacks.
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Story added 9. September 2015, content source with full text you can find at link above.