Rhysida actors have commonly been observed authenticating to internal VPN access points with compromised valid credentials, notably due to organizations lacking MFA enabled by default. Remote services, such as virtual private networks (VPNs), allow users to connect to internal enterprise network resources from external locations. Rhysida actors have been observed leveraging external-facing remote services to initially access and persist within a network. Any ransoms paid are then split between the group and the affiliates.įor additional information on Vice Society actors and associated activity, see the joint CSA #StopRansomware: Vice Society. Additionally, open source reporting has confirmed observed instances of Rhysida actors operating in a ransomware-as-a-service (RaaS) capacity, where ransomware tools and infrastructure are leased out in a profit-sharing model. Open source reporting details similarities between Vice Society (DEV-0832) activity and the actors observed deploying Rhysida ransomware. Threat actors leveraging Rhysida ransomware are known to impact “targets of opportunity,” including victims in the education, healthcare, manufacturing, information technology, and government sectors. See the ATT&CK Tactics and Techniques section for tables mapped to the threat actors’ activity. Note: This advisory uses the MITRE ATT&CK® for Enterprise framework, version 14. The information in this CSA is derived from related incident response investigations and malware analysis of samples discovered on victim networks.įBI, CISA, and the MS-ISAC encourage organizations to implement the recommendations in the Mitigations section of this CSA to reduce the likelihood and impact of Rhysida ransomware and other ransomware incidents. Rhysida-an emerging ransomware variant-has predominately been deployed against the education, healthcare, manufacturing, information technology, and government sectors since May 2023. The Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) are releasing this joint CSA to disseminate known Rhysida ransomware IOCs and TTPs identified through investigations as recently as September 2023. Visit to see all #StopRansomware advisories and to learn more about other ransomware threats and no-cost resources. These #StopRansomware advisories include recently and historically observed tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to help organizations protect against ransomware. Note: This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders detailing various ransomware variants and ransomware threat actors.
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