Called and left no message. Called ID shows "CHEATER SR CHAR" - ???

Called multiple times in a day for multiple days. Never leaves a message.

Said they were a computer technician, told them to not call me and hung up. Ive been getting these calls often lately, absolutely annoying.

Said they were a online computer technician and they have identified some malicious activity from my IP address and wanted me to get online on my system and allow them remote access to clean the computer. When I asked how can I be sure that they are genuine. The simply hung up. Its new kind of spam. You never know this might be ransomware attack. BTW, their accent closely resembles south Asian.