Cooke County Sheriff's Office Listed by revil Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
The Cooke County Sheriff's Office Listed by revil Ransomware Group (reported July 4, 2020) is an unverified claim; the data involved is undisclosed belonging to roughly unknown people. If you have an account with them, your information may now be circulating on the open web and with data brokers. Here’s exactly what happened, how to check if you were affected, and what to do next.
In 2020, ransomware operators increasingly turned to public leak sites to pressure victims after encrypting systems, a tactic that extended the impact of attacks beyond immediate operational disruption. The Cooke County Sheriff's Office appeared on one such site operated by the group known as revil on July 4, 2020, with the listing accompanied by a claim that internal files had been taken.
The number of individuals potentially affected remains unknown, and no further details about the volume or nature of any data have been released publicly. Incidents involving local law-enforcement agencies draw attention because they handle records that can contain sensitive personal and investigative information.
What happened
The Cooke County Sheriff's Office was listed on the revil ransomware group's leak site on July 4, 2020. The group claims to have stolen internal data during a ransomware attack. No official confirmation of the incident's scale, method of initial access, or the exact files involved has been made public. The number of people whose information may have been exposed is not known.
Inside revil
Revil, also tracked as Sodinokibi, was a ransomware-as-a-service operation active in 2019 and 2020. The group supplied encryption tools to affiliate attackers in exchange for a share of ransom payments and maintained a leak site where stolen data was posted when victims declined to pay. Its campaigns typically involved initial access through phishing, remote-desktop vulnerabilities, or compromised service providers, followed by data exfiltration before encryption. The group targeted a range of organizations, including local governments and public-sector entities, as part of a broader pattern of ransomware activity against critical infrastructure during that period.
Who is Cooke County Sheriff's Office?
The Cooke County Sheriff's Office is the primary law-enforcement agency for Cooke County, Texas, responsible for patrol, investigations, jail operations, and court security. Agencies of this type routinely collect and store personal identifiers, arrest records, incident reports, and other investigative materials. A breach at such an organization can affect both residents of the county and individuals who have had contact with the justice system, because the data held is often not duplicated elsewhere and can remain relevant for years.
What was likely exposed
The only detail released is that internal files were claimed to have been exfiltrated. The precise categories of data, file counts, or time periods covered have not been disclosed. Organizations in this sector commonly maintain names, addresses, dates of birth, Social Security numbers, criminal-history information, and details from ongoing investigations. Without an official statement, it is not possible to confirm whether any of these data types were among the files referenced in the listing.
What's at stake
For individuals, exposure of law-enforcement records can lead to privacy loss, potential misuse of personal identifiers, or unwanted attention if investigative details become public. For the agency, the incident adds administrative burden, possible legal review, and the need to assess whether any operational methods or informant information were included. Because the exact contents remain unconfirmed, the practical consequences for any specific person cannot yet be determined.
Were you affected?
Begin by contacting the Cooke County Sheriff's Office directly for any official notifications or guidance they may issue. Individuals can also review their own recent interactions with the agency and monitor financial and identity-related accounts for unusual activity. Running a free exposure scan of your email address against known breach data provides one way to check whether your information has appeared in previously published datasets from other incidents.
AICompiled with AI assistance from public sources and published under our editorial standards.
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Publicly posted by revil — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.