In the wake of a weekend cyber attack , ECMC officials say the hospital ’ s IT staff discovered the virus and shut down the hospital ’ s computer network , before it could infect their files . ECMC spokesman Peter Cutler said , State Police and the FBI are investigating . “ We do know that a virus was launched into our system and the good news , again , is that we reacted to it immediately. ” With the medical center ’ s computer network still offline , ECMC is conducting business the old fashioned way , on paper—no website , no email—and Cutler says they don ’ t believe patient files were compromised Attack.Databreach in any way . “ Through the assessments that we have been running , we have seen no indication that there has been a compromise Attack.Databreach of patient health information. ” Investigators would not say how hackers attacked ECMC ’ s computers , but authorities in the field of cyber security say , this attempted intrusion has all the hallmarks of ransomware . University at Buffalo cyber security expert Arun Vishwanath says ransomware attacks Attack.Ransom have grown exponentially in the last two years , and likens them to Internet extortion Attack.Ransom . “ They are very successful , and so that is why we are seeing an exponential growth in ransomware attacks Attack.Ransom . We are talking about somewhere between 5,000 attacks per day that are reported–let alone the ones that are not even reported. ” Vishwanath says ransomware attacks Attack.Ransom are big reward low risk ventures , since the hackers are usually from other countries , and rarely get caught . Unwitting victims download an infected attachment from an email and the virus spreads quickly . “ The moment you click on the malware , this malware basically locks down your computer , and all the files in it , and any file that is connected to any other computer that you are connected to . So this can spread through your network in minutes. ” The hacker then demands Attack.Ransom the target pay a ransom Attack.Ransom to get their files unencrypted , and in just about every ransomware attack Attack.Ransom , the hackers cover their tracks by demanding payment Attack.Ransom in bitcoin–a virtual currency that is hard , if not impossible to trace . Once the ransom is paid Attack.Ransom , the hackers send their victim an electronic key to unlock their encrypted files , but if the payment is not made within a certain time frame the hacked files are lost forever .