The FBI has issued a security alert about Netwalker ransomware operators targeting U.S. and foreign government organizations. Victims advised not to pay the ransom and reporting incidents to their local FBI field offices. The FBI also advises using anti-virus or anti-malware solutions on all network hosts, only connecting through secure networks via a VPN (where possible) Back-up critical data should be stored offline, with copies stored on external storage devices or in the cloud to make it harder for the attackers to gain access and encrypt them.
Source: https://www.bleepingcomputer.com/news/security/fbi-warns-of-netwalker-ransomware-targeting-us-government-and-orgs/