36-year-old Yemeni man indicted in the U.S. for 1,500 attacks on Microsoft Exchange servers as an admin of Black Kingdom ransomware.
FBI investigating the case with the help of the New Zealand Police.
The man demanded ransom payments of $10,000 in Bitcoin from the victims and is believed to be residing in Yemen.
If convicted, the man faces up to five years in federal prison for each charge related to deploying Black Kingdom ransomware on vulnerable Exchange mail servers.