Was Pajulahti hit by ransomware?

Pajulahti was listed by the thegentlemen ransomware operation (Finland), 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 thegentlemen ransomware group?

thegentlemen 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 Pajulahti breach?

thegentlemen published data attributed to Pajulahti. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Kolmen kampuksen urheiluopisto

listed as Pajulahti · Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedSep 26, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Finland
Sector: Manufacturing
Listed on leak site: Sep 26, 2026

About the victim

AI dossier — public-source company profile

Kolmen kampuksen urheiluopisto is Finland's largest sports institute, formed in January 2025 from the merger of Pajulahti (founded 1929), Kisakallio, and the Helsinki-based Urhea campus. Operating on a non-profit basis across three locations, it serves as Finland's official Olympic and Paralympic Training Center, offering professional sports education, training facilities, and hospitality services to ~320,000 visitors annually.

Industry: Sports Training & Education — Olympic/Paralympic Training Centers
Address: Pajulahti campus: Nastola (Lahti), Finland; Kisakallio campus: Lohja, Finland; Urhea campus: Helsinki, Finland
Employees: ~200
Founded: 1929

Attack summary

Severity: low — No proof files, screenshots, or data samples are advertised in the leak post. No specific data type, volume, or operational disruption is claimed. The disclosure is announcement-only without substantiation.

TheGentlemen claims to have conducted a data breach against Pajulahti (now part of Kolmen kampuksen urheiluopisto). The leak post does not specify what data was exfiltrated or encrypted, nor does it detail the operational impact or ransom demand.

low

What the group claims

pajulahti.com zoominfo.com/c/pajulahti/369113600 Pajulahti Sports Institute is one of Finland's oldest and largest sports institutes, founded in 1929 and located on 110 hectares by Lake Iso-Kukkanen in Nastola (Lahti), about an hour from Helsinki. It is Finland's only official Olympic and Paralympic Training Center, known for its focus on endurance sports and paralympic athletics. Since January 2025, Pajulahti has been merged with Kisakallio and the Helsinki-based Urhea campus into Kolmen kampuksen urheiluopisto — the largest sports institute in Finland, with 3 campuses, ~200 employees, 73,000 m² of sports facilities, 320,000 visitors per year, and ~500 students in professional sports education. The merged group generates about €26 million in annual revenue, operates on a non-profit basis (owned by foundations)

Sources

Victim sitepajulahti.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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 889 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post September 26, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

September 26, 2026Pajulahti listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 889 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,696 disclosures indexed across all operators we track. Geographically, Pajulahti is reported in Finland, a country with 4 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Pajulahti 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, NCSC-FI (Finland), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen'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.