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 278 public disclosures across our corpus. First observed on a leak site on June 5, 2023; most recent post May 20, 2026. The operation is currently active.

Timeline of this disclosure

May 18, 2026Southold Town Senior Services / Southold Police Department listed by Rhysidaon the group's public leak site

Data size: 1.7 TB
Records: 767,693 files

Sector and geography

This disclosure adds to ransomware activity in the Government sector, which has 509 disclosures indexed across all operators we track. Geographically, Southold Town Senior Services / Southold Police Department is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Southold Town Senior Services / Southold Police Department

Claimed by Rhysida · listed 3 days ago

1.7 TB

Data size

767,693 files records

Age

since listed · data leaked

Status timeline

Listed
May 18, 2026
Data leaked

At a glance

Group: Rhysida
Status: Data leaked
Country: United States
Sector: Government
Listed on leak site: May 18, 2026
Data size: 1.7 TB
Records: 767,693 files

About the victim

AI dossier — public-source company profile

The Town of Southold is a local government municipality located in Suffolk County, New York. It provides a range of public services including forms and permits, online payments, tax records, and municipal administration. The Southold Police Department and Senior Services department operate under this town government.

Industry: Local Municipal Government
Address: Town Hall, 53095 Route 25, PO Box 1179, Southold, NY 11971

Attack summary

Severity: critical — 1.7 TB of data across 767,693 files from a police department and senior services agency has been fully published publicly, representing confirmed exfiltration of likely PII at scale, law enforcement records, and potentially sensitive records of elderly residents — all regulated/sensitive categories.

Rhysida claims to have exfiltrated 1.7 TB of data (767,693 files) from Southold Town Senior Services and the Southold Police Department, and states that all files have been uploaded to public access.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government administrative records
Police department files
Senior services records
Resident personal information
Town permit and forms data
Internal government documents

What the group claims

The Town of Southold, New York provides various government services including forms and permits, online payments, and notifications for residents. Southold Police Department operates in the local government industry.

The leak post

captured from the group's site

Tower View Primary School is an educational institution that serves approximately 380 pupils across 14 classes.
With just 7 days on the clock, seize the opportunity to bid on exclusive, unique, and impressive data. Open your wallets and be ready to buy exclusive data. We sell only to one hand, no reselling, you will be the only owner!
STELIA North America is an aerospace and defence company specializing in the design, development, and manufacturing of composites.10 TB of confidential data!Data from major partner companies, such as: Lockheed Martin, Northrop Grumman, Sikorsky, Leonardo, L3Harris, Airbus Atlantic, Boeing, Bombardier, De Havilland, ARDE, MDA.
Data Catalog: 9,3 Tb, 4 324 287 Files 
All files was uploaded to public access, data hunters, enjoy 
[Southold Town Senior ServicesSouthold Police Department](https://www.southoldtownny.gov)
The Town of Southold, New York provides various government services including forms and permits, online payments, and notifications for residents. Southold Police Department is a company that operates in the Local industry.
Data Catalog: 1,7 Tb, 767 693 Files 
All files was uploaded to public access, data hunters, enjoy 
We will post news abo…

Data the group says was taken

government records

Sources

Victim sitehttps://www.southoldtownny.gov
Leak posthttp://rhysidafc6lm7qa2mkiukbezh7zuth3i4wof4mh2audkymscjm6yegad.onion/

Source

Indexed 3 days 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.

Disclosure context

About Rhysida

Timeline of this disclosure

Other recent disclosures by Rhysida

Sector and geography

Status timeline

At a glance

About the victim

Attack summary

Data the group says was taken

What the group claims

The leak post

Data the group says was taken

Sources

Source