Was Lumabuilt hit by ransomware?

Lumabuilt was listed by the nightspire ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the nightspire ransomware group?

nightspire is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Lumabuilt breach?

nightspire published data attributed to Lumabuilt. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Lumabuilt

Claimed by Nightspire · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedOct 8, 2026
Data leakeddate unknown

At a glance

Group: Nightspire
Status: Data leaked
Country: United States
Sector: Manufacturing
Listed on leak site: Oct 8, 2026

About the victim

AI dossier — public-source company profile

Lumabuilt is a U.S.-based manufacturer of architectural aluminum cladding and ACM (Aluminum Composite Material) systems. The company designs, manufactures, and delivers a full spectrum of products including extruded aluminum planks, battens, beams, precision ACM panels, and fabricated aluminum plate systems for modern architectural applications. They provide design-assist services and technical support to architects and specifiers.

Industry: Architectural Aluminum Cladding & ACM Systems Manufacturing

Attack summary

Severity: low — Data has been published according to disclosure status, but the leak post provided contains no substantive details about what was accessed, exfiltrated, or encrypted. No proof files, screenshots, or data samples are referenced. Without evidence of the attack scope or sensitive data exposure, severity cannot be elevated.

The nightspire group claims to have published data from Lumabuilt. No specific details about the nature of the attack (encryption vs. exfiltration) or data categories are provided in the leak post excerpt.

low

Original description

AI-summarised, not from the leak post

N/A I don't have reliable, verified information about a company called "Lumabuilt." Rather than provide potentially fabricated details about its industry, operations, or country, I'm flagging this as unknown. If you have additional context (website, location, sector) or if this is a fictional/test entity, please share details and I can help frame a description accordingly.

Sources

Victim sitelumabuilt.com

Source

Indexed 4 hours 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.

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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 358 public disclosures across our corpus. First observed on a leak site on March 12, 2025; most recent post October 8, 2026. The operation is currently active.

Also tracked as: NIGHT SPIRE.

Timeline of this disclosure

October 8, 2026Lumabuilt listed by nightspire on the group's public leak site

Other recent disclosures by nightspire

nightspire has been linked to 358 public victims on Darkfield. A sample of the most recent:

See the full nightspire dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,699 disclosures indexed across all operators we track. Geographically, Lumabuilt is reported in United States, a country with 3,175 ransomware disclosures in our corpus.

If your organisation is affected

A listing by nightspire means Lumabuilt appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on nightspire's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.