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

April 3, 2026Neptune Mechanical, Inc. listed by nightspireon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Neptune Mechanical, Inc. 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

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Neptune Mechanical, Inc.

Claimed by nightspire · listed 2 months ago

47d

Age

since listed · data leaked

Status timeline

Listed
Apr 3, 2026
Data leaked

At a glance

Group: nightspire
Status: Data leaked
Country: US
Sector: Manufacturing
Listed on leak site: Apr 3, 2026

About the victim

AI dossier — public-source company profile

Neptune Mechanical, Inc. is a licensed, insured, and bonded Class A HVAC contractor based in Virginia Beach, Virginia, providing residential and commercial plumbing, heating, air conditioning, ductwork, and indoor air quality services. The company serves Virginia Beach and surrounding areas including Chesapeake, Sandbridge, Pungo, and Dam Neck. It operates as a local/regional service provider reachable at 757-821-6984.

Industry: Plumbing, Heating & HVAC Services
Address: Virginia Beach, Virginia, US

Attack summary

Severity: high — The group claims confirmed exfiltration and has published data covering employee PII, payroll, HR records, and financial/accounting data — constituting sensitive regulated personal and financial information. While the company is a small regional contractor, the breadth of data categories (PII, financial, payroll) elevates this beyond medium, though the limited scale of the organisation prevents a critical rating.

The Nightspire ransomware group claims to have exfiltrated data from Neptune Mechanical, Inc. and has published it; the disclosed data categories include banking and financial system records, accounting and tax records, payroll and employee financial data, HR and employee personal data, and real estate and tenant data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Banking & financial system records
Accounting & tax records
Payroll & employee financial data
HR & employee personal data
Real estate & tenant data

What the group claims

- Banking & Financial Systems- Accounting & Tax Records- Payroll & Employee Financial Data- HR & Employee Personal Data- Real Estate & Tenant Data

Sources

Victim sitecallneptune.com

Source

Indexed 2 months 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.