The group also used advanced techniques to acquire access to the networks and used software to control intrusions.
The Chinese Government said it would investigate this matter if given genuine proof.
It is like a kidnapper demanding money if he holds a person hostage.
Besides this, the transport company was also affected, says the report.
Ransomware has been present since 1989, called an AIDS Trojan, and it usually propagates as a Trojan.
Later it was resolved.
