Rhysida claims that sensitive information was extracted during the intrusion and that a ransom of nine bitcoin—about $787,000 at the time of the claim—has been demanded. To support its claim, the group released what it described as sample records taken from the sheriff’s office. The leaked material reportedly includes Social Security cards, criminal background checks, booking documents, court filings, mugshots, and medical information.
Authorities have not yet confirmed whether the stolen data is authentic or how many individuals may be affected. It also remains unclear how the attackers gained access, whether systems remain compromised, or if the sheriff’s office intends to negotiate with the group.
In a brief public statement, the agency reported that a “cybersecurity incident” had disrupted its network and that a full investigation was underway. The sheriff’s office emphasized that emergency response and daily law enforcement functions were continuing without interruption. A Facebook post associated with the announcement—later removed—reiterated that 911 services, patrol response, and public safety operations remained operational. County IT teams are still assessing the full extent of the attack.
Rhysida is a relatively recent but increasingly active ransomware operation, first identified in May 2023. The group operates under a ransomware-as-a-service model, allowing affiliates to deploy its malware in exchange for a share of ransom proceeds. Rhysida’s typical method involves data theft followed by encryption, with the group demanding payment both to delete stolen files and to provide decryption keys. The group has now claimed responsibility for at least 246 ransomware attacks, nearly 100 of which have been confirmed by affected organizations.
Government agencies continue to be frequent targets. In recent years, Rhysida has claimed attacks on the Maryland Department of Transportation and the Oregon Department of Environmental Quality, although both organizations reported refusing ransom demands. Broader data suggests the trend is escalating, with researchers documenting at least 72 confirmed ransomware attacks on U.S. government entities so far in 2025, affecting nearly 450,000 records.
The average ransom demand across these incidents is estimated at $1.18 million. The Cleveland County Sheriff’s Office serves approximately 280,000 residents in Oklahoma and has around 200 employees. As the investigation remains active, officials say additional updates will be shared as more information becomes available.
