WannaCry Ransomware attacks in Hyderabad firms

Three companies are reportedly impacted severely by the recent  attack of WannaCry ransomware cryptoworm. It is reported that the hackers demanded USD 21,000 in three cases, per police reports. Despite being alerted  by Indian Computer Emergency Response Team (ICERT), before the ransomware attack,  the reports shows how ill-prepared the companies were on the measures they should have taken to ward it off.