Was Anne Arundel County hit by ransomware?

Anne Arundel County was listed by the Rhysida ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Rhysida ransomware group?

Rhysida is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Anne Arundel County breach?

Rhysida published data attributed to Anne Arundel County. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Anne Arundel County

Claimed by Rhysida · listed 5 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedOct 9, 2026
Data leakeddate unknown

At a glance

Group: Rhysida
Status: Data leaked
Country: United States
Sector: Government & Defense
Listed on leak site: Oct 9, 2026

About the victim

AI dossier — public-source company profile

Anne Arundel County is a governmental body established in 1964, comprising numerous departments and services serving residents of Anne Arundel County, Maryland. As a US county government, it provides municipal services, public health, social services, law enforcement, and administrative functions.

Industry: Local Government Administration
Address: Anne Arundel County, Maryland, US
Founded: 1964

Attack summary

Severity: critical — Confirmed exfiltration of multiple categories of highly regulated and sensitive data at scale: SSNs and background checks, protected health information including methadone records under 42 CFR Part 2, welfare and identity documents, financial records, and law enforcement intelligence. Affects hundreds of thousands of individuals and violates numerous federal confidentiality statutes.

Rhysida claims to have exfiltrated 814,500 files totaling 2.6 TB from Anne Arundel County's systems. The group alleges access to background-check records with SSNs, medical faxes, confidential methadone clinic records, welfare case files with identity documents and financial data, payroll registers, and jail intelligence files.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Background-check dossiers with full SSNs (721 records plus 2026 additional)
Medical faxes with patient names and diagnoses (2022–2026)
Methadone clinic records (42 CFR Part 2 protected)
Medical-assistance files with driver licenses, Green Cards, SSN cards, tax forms, bank data (47,602 files)
County payroll registers with salaries, HR memos, contracts, pension data
Jail gang-intelligence files and gang-member master list

What the group claims

Anne Arundel County Established in 1964, Anne Arundel County is a governmental body, consisting of numerous departments, services and sections all working together to serve the residents. This company is headquartered in Anne Arundel County, Maryland.814,500 files, 2.6 TB721 background-check dossiers with full SSNs in filenames, including 2026 records.Tens of thousands of medical faxes, 2022 to 2026, with patient names and diagnoses.Methadone clinic records under 42 CFR Part 2, the strictest US confidentiality regime.47,602 medical-assistance files with driver licenses, Green Cards, SSN cards, tax forms and bank data.County payroll registers with all salaries, HR memos, contracts, pension and discipline databases.Jail gang-intelligence files with a gang-member master list. More

The leak post

captured from the group's site

Established in 1964, Anne Arundel County is a governmental body, consisting of numerous departments, services and sections all working together to serve the residents. This company is headquartered in Anne Arundel County, Maryland.814,500 files, 2.6 TB721 background-check dossiers with full SSNs in filenames, including 2026 records.Tens of thousands of medical faxes, 2022 to 2026, with patient names and diagnoses.Methadone clinic records under 42 CFR Part 2, the strictest US confidentiality regime.47,602 medical-assistance files with driver licenses, Green Cards, SSN cards, tax forms and bank data.County payroll registers with all salaries, HR memos, contracts, pension and discipline databases.Jail gang-intelligence files with a gang-member master list.
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Established in 1964, Anne Arundel County is a governmental body, consisting of numerous departments, services and sections all working together to serve the residents. This company is headquartered in Anne Arund…

Sources

Leak posthttp://rhysidafohrhyy2aszi7bm32tnjat5xri65fopcxkdfxhi4tidsg7cad.onion/archive.php?company=281

Source

Indexed 5 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Rhysida

Rhysida is a ransomware group that emerged in June 2023, operating with primarily financial motivations through targeted attacks against critical infrastructure and public sector organizations. The group's origin and potential state affiliations remain unclear, though they operate independently rather than as a traditional Ransomware-as-a-Service model, with limited public documentation regarding connections to other cybercriminal organizations. Rhysida employs double extortion tactics, typically gaining initial access through compromised VPN credentials and exploiting vulnerable public-facing applications before deploying their ransomware payload and exfiltrating sensitive data prior to encryption. The group has demonstrated a particular focus on healthcare and educational institutions, with notable attacks documented by CISA and FBI advisories highlighting their targeting of hospitals and school districts across multiple countries, resulting in significant operational disruptions to critical services. As of late 2024, Rhysida remains an active threat with continued operations targeting organizations primarily in the United States, Canada, and other Western nations, maintaining their focus on high-value sectors where operational disruption can maximize ransom payment likelihood. The group has been linked to 382 public disclosures across our corpus. First observed on a leak site on June 5, 2023; most recent post October 9, 2026. The operation is currently active.

Timeline of this disclosure

October 9, 2026Anne Arundel County listed by Rhysida on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Government & Defense sector, which has 6 disclosures indexed across all operators we track. Geographically, Anne Arundel County is reported in United States, a country with 3,176 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Rhysida means Anne Arundel County appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on Rhysida's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.