Was MKS Transformator hit by ransomware?

MKS Transformator was listed by the nightspire ransomware operation (Türkiye), 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 MKS Transformator breach?

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

Ransomware victim disclosure

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MKS Transformatör Ekipmanları

listed as MKS Transformator · Claimed by Nightspire · listed 2 days ago

Age

since listed · data leaked

Status timeline

ListedJul 27, 2026
Data leakeddate unknown

At a glance

Group: Nightspire
Status: Data leaked
Country: Türkiye
Sector: Manufacturing
Listed on leak site: Jul 27, 2026

About the victim

AI dossier — public-source company profile

MKS Transformatör Ekipmanları, founded in 2003, manufactures transformer cores and related electrical components for power and distribution transformers up to 1000 MVA. Headquartered in Kocaeli, Turkey with a 10,000 m² facility, the company employs specialized engineers and operates cutting and lamination machinery for custom core production.

Industry: Electrical Equipment Manufacturing - Transformer Cores & Components
Address: Şekerpınar Mah. Süleymaniye Cad. Göktürk Sok. No:37 Çayırova / Kocaeli, Turkey
Founded: 2003

Attack summary

Severity: high — Confirmed exfiltration of sensitive business data including accounting, finance, HR, and manufacturing records of a specialized industrial manufacturer. No regulated PII at scale evident, but significant operational and financial data exposure.

The nightspire group claims to have exfiltrated accounting, finance, projects, procurement, quality control, maintenance, HR documents, and production/manufacturing data from MKS Transformatör.

high

Data the group says was taken

AI dossier — extracted from the leak post

Accounting and Finance Documents
Project Data
Purchasing and Procurement Documents
Quality and Document Control Records
Maintenance Documentation
HR Documents
Production and Manufacturing Data

What the group claims

- Accounting / Finance Documents- Projects Data, Purchasing / Procurement Documents- Quality / Document Control- Maintenance, and HR documents- Production / Manufacturing Data

Sources

Victim sitewww.mksltd.net

Source

Indexed 2 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.

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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 328 public disclosures across our corpus. First observed on a leak site on March 12, 2025; most recent post July 27, 2026. The operation is currently active.

Also tracked as: NIGHT SPIRE.

Timeline of this disclosure

July 27, 2026MKS Transformator listed by nightspireon the group's public leak site

Other recent disclosures by nightspire

nightspire has been linked to 328 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 3,684 disclosures indexed across all operators we track. Geographically, MKS Transformator is reported in Türkiye, a country with 31 ransomware disclosures in our corpus.

If your organisation is affected

A listing by nightspire means MKS Transformator 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.
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.