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NightSpire, also tracked as Nightspire and nightspire_ransomware, is a financially motivated ransomware and data-extortion group that emerged in March 2025. It conducts double-extortion operations, stealing sensitive information and encrypting compromised systems before demanding payment and threatening public disclosure. Its dedicated dark-web leak site lists victim organizations and uses publication countdowns to increase pressure. The group also uses direct pressure emails and public shaming through Telegram to encourage negotiations. NightSpire targets organizations across North America, Europe, Asia, the Middle East, and South America. Its targets include healthcare and pharmaceutical organizations, educational institutions, manufacturers, technology providers, retailers, hospitality businesses, professional services firms, transportation and logistics companies, and government bodies. Its geographically dispersed targeting includes the United States, United Arab Emirates, Japan, France, United Kingdom, Canada, Brazil, India, South Korea, Argentina, Colombia, Hong Kong, Taiwan, and Thailand. NightSpire's intrusion methods include exploitation of exposed FortiOS appliances through CVE-2024-55591, an authentication-bypass vulnerability that enables super-administrator access. Its operations include network and file discovery, lateral movement through remote services and file-transfer mechanisms, and abuse of legitimate administrative utilities to reduce detection. Tools associated with its activity include PowerShell, WinSCP, MEGACmd, 7-Zip, and the Everything search utility. Stolen data is transferred to cloud storage, including MEGA, before ransomware deployment and extortion.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
35 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 malware family attributed to this actor across reporting.
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
24 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
NightSpire claimed responsibility for an attack against U.S.-based KC Pharmaceuticals and threatened to release sensitive data unless its demands were met. The report does not independently confirm the breach, data theft, or deployment of ransomware.
Nightspire is identified as a ransomware group that claimed responsibility for attacking Sinae Phuket Luxury Hotel in Thailand on October 8, 2026. The report does not independently confirm the claim or provide details about initial access, encryption, data theft, or ransom demands.
Nightspire claimed responsibility for attacking the US-based catering company Heidi’s Events & Catering, Inc. and threatened to publish sensitive company data unless a company representative contacted the group to negotiate. The report does not independently confirm the compromise, data theft, or ransomware deployment.
Reportedly conducted a ransomware attack against PMG Project Management Group, a professional services organization in the United Arab Emirates. The reported breach date is October 9, 2026, with discovery at 06:03 UTC that day. The content provides no technical details or information about affected data.
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Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.