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 7, 2026Cabinet d’Étude en Sécurité Pyrotechnique listed by nightspireon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Cabinet d’Étude en Sécurité Pyrotechnique is reported in FR, a country with 238 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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Cabinet d’Étude en Sécurité Pyrotechnique

Claimed by nightspire · listed 1 month ago

43d

Age

since listed · data leaked

Status timeline

Listed
Apr 7, 2026
Data leaked

At a glance

Group: nightspire
Status: Data leaked
Country: FR
Sector: Business Services
Listed on leak site: Apr 7, 2026

About the victim

AI dossier — public-source company profile

Cabinet d'Étude en Sécurité Pyrotechnique (C.E.S.P.) is an independent French consultancy founded in 2005, specialising in pyrotechnic risk assessment and safety. The firm provides expertise in unexploded ordnance (UXO) decontamination of polluted sites and soils, pyrotechnic safety studies for industrial activities (production, storage, maintenance), and project-owner assistance. It serves public and private project owners, civil and military authorities, and construction professionals across France.

Industry: Pyrotechnic Risk Consulting & Safety Engineering
Address: Le Masters, 25 rue de Châtillon, 25480 École Valentin, France
Founded: 2005

Attack summary

Severity: high — The firm works with the French Ministry of Armed Forces and handles sensitive pyrotechnic/UXO site data for military and civil infrastructure projects; a confirmed data publication by the threat actor involving such operationally sensitive information warrants a high severity rating even absent detailed inventory.

The Nightspire ransomware group claims to have attacked C.E.S.P. and lists the disclosure status as data_published, indicating data exfiltration and/or publication. No specific details on the volume or nature of stolen data are available from the truncated leak post.

high

What the group claims

Data is not available now.

Sources

Victim sitewww.cespyro.com

Source

Indexed 1 month 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.