Disclosure context

About nightspire

Nightspire is a ransomware group that first emerged in March 2025 and appears to be primarily financially motivated, having targeted over 215 victims in a relatively short operational timeframe. The group's origin and affiliations remain unclear due to limited public documentation from major cybersecurity organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing. Based on available victim data, Nightspire appears to employ common ransomware attack vectors targeting organizations across multiple sectors, with a particular focus on manufacturing, technology, healthcare, and construction industries, while demonstrating a geographic preference for victims in the United States, India, Taiwan, France, and Hong Kong. The group's rapid victim acquisition rate since their March 2025 emergence suggests an active and potentially effective operational capability, though specific technical details about their attack methodology, encryption techniques, or extortion tactics have not been publicly documented by major threat intelligence firms. Given the recent emergence of this group and limited public reporting from established cybersecurity organizations like CISA, FBI, or Mandiant, Nightspire remains an active threat with insufficient public documentation to fully assess their operational sophistication or organizational structure. The group has been linked to 265 public disclosures across our corpus. First observed on a leak site on March 12, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

May 1, 2026The Country Club of Darien listed by nightspireon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Hospitality and Tourism sector, which has 159 disclosures indexed across all operators we track. Geographically, The Country Club of Darien is reported in US, a country with 2,713 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

← All victims

The Country Club of Darien

Claimed by nightspire · listed 20 days ago

19d

Age

since listed · data leaked

Status timeline

Listed
May 1, 2026
Data leaked

At a glance

Group: nightspire
Status: Data leaked
Country: US
Sector: Hospitality and Tourism
Listed on leak site: May 1, 2026

About the victim

AI dossier — public-source company profile

The Country Club of Darien is a private members club located in Darien, Connecticut, USA. It provides golf, dining, social, and recreational amenities to its members and their guests. As a private club it serves a predominantly affluent local membership base in Fairfield County.

Industry: Private Members Club & Hospitality
Address: 300 Mansfield Avenue, Darien, CT 06820
Employees: 51-200

Attack summary

Severity: high — Data has been confirmed published (disclosed status: data_published), meaning exfiltration is not merely claimed but enacted. The data inventory includes business administration and commercial operations records which likely contain member PII, financial, and contact information for an affluent private membership base, constituting significant sensitive data exposure.

Nightspire claims to have exfiltrated business data from The Country Club of Darien and has published the data, with disclosed categories spanning commercial operations, business administration, software and digital assets, and branding materials.

high

Data the group says was taken

AI dossier — extracted from the leak post

Sales / agent / commercial operations data
Industrial / manufacturing / tooling business data
Research & development / technical project data
Business admin / office operations data
Software / digital assets / branding materials

What the group claims

- Sales / agent / commercial operations- Industrial / manufacturing / tooling business data- Research & development / technical project data- Business admin / office operations- Software / digital assets / branding

Source

Indexed 20 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.