Rhysida is a Ransomware-as-a-Service criminal group targeting government, defense, healthcare, and manufacturing sectors.
Analyst brief
Rhysida is a criminal Ransomware-as-a-Service (RAAS) group that emerged in May 2023, still in the early stages of development. It primarily targets the Government, Defense, Healthcare, and Manufacturing sectors in the United States and Australia. The group uses phishing and Cobalt Strike for initial access, encrypts files with the '.ryshida' extension, demands Bitcoin payments, and threatens to leak exfiltrated data via its portal. Defenders should focus on phishing prevention, detecting Cobalt Strike C2 activity, and monitoring for the '.ryshida' extension as an indicator of compromise.
rhysida
activecrime
Rhysida is a ransomware-as-a-service (RAAS) group that emerged in May 2023. The group utilizes a namesake ransomware through phishing attacks and Cobalt Strike to breach the targets' networks and deploy their payloads.<br> <br> The group threatens to publicly distribute exfiltrated data if the ransom is not paid, and it's worth mentioning that Rhysida is still in the early stages of development.<br> <br> The ransomware leaves PDF notes in the affected folders, instructing victims to contact the group through its portal, and payment is made via Bitcoin.<br> <br> After encryption, the ransomware appends the extension '.ryshida' to encrypted files.<BR>Source: https://github.com/crocodyli/ThreatActors-TTPs