The development weighing on investors ' sentiment is the fallout from a massive global cyber attack . The global cyber attack that crippled more than hundreds of thousands of computers over 150 countries is poised to swell today . The ransomware employed by hackers , who have demanded Bitcoin payments Attack.Ransom from the victims , renders files stored on afflicted computers inaccessible completely . A number of large corporations and many hospitals in Britain have been infected with this malware . There have been reports of infections in 150 countries , including the UK , US , China , Russia , Spain , Italy and Taiwan . The US President Donald Trump directed his homeland security adviser to hold meetings on the matter over the weekend . Back home the Indian IT ministry has contacted the Reserve Bank of India and Unique Identification Authority of India ( UIDAI ) and sought advice on online protection from both these bodies In an interview to CNBC-TV18 , S Ramadorai , Former Chairman of Tata Consultancy Services ( TCS ) shared his readings and outlook on global cyber attack . He said that India is one of the most vulnerable countries to cyber attack . India needs a mass movement for cyber awareness , implementation and protection , he added .