Was University of Defence - Full Leak hit by ransomware?

University of Defence - Full Leak was listed by the Monti ransomware operation (Czech Republic), 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 Monti ransomware group?

Monti 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 University of Defence - Full Leak breach?

Monti published data attributed to University of Defence - Full Leak. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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University of Defence

listed as University of Defence - Full Leak · Claimed by Monti · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

ListedOct 23, 2023
Data leakeddate unknown

At a glance

Group: Monti
Status: Data leaked
Country: Czech Republic
Sector: Education
Listed on leak site: Oct 23, 2023

About the victim

AI dossier — public-source company profile

The University of Defence (Univerzita obrany) is a Czech military university located in Brno, Czech Republic, operating under the Ministry of Defence. It provides higher education and research focused on military engineering, technology, economics, and leadership for the Czech Armed Forces. It is the only military university in the Czech Republic.

Industry: Military Higher Education & Defence Research
Address: Kounicova 65, 662 10 Brno, Czech Republic
Founded: 2004

Attack summary

Severity: critical — The victim is a military university operating under the Czech Ministry of Defence; a full data leak likely exposes regulated PII at scale, military personnel information, and potentially sensitive defence-related research, all of which meet the critical threshold for regulated and government/defence data exfiltration.

The Monti ransomware group claims to have fully exfiltrated data from the University of Defence and has published the data in full ('Full Leak'), indicating both exfiltration and public disclosure of potentially sensitive military and academic records.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Military personnel records
Student academic records
Research and defence-related documents
Administrative files
Staff personal data

What the group claims

The city of Brno was chosen as the location for the new engineering-oriented military college due to its long tradition of superior quality engineering education.

Sources

Leak posthttp://mblogci3rudehaagbryjznltdp33ojwzkq6hn2pckvjq33rycmzczpid.onion/blog/b4a7f8a258b93ba3de493134d47355ffb5b1247dc32f06d17d036c2fab17c457/

Source

Indexed 3 years 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 Monti

Monti is a ransomware group that emerged in December 2022, operating with primarily financial motivations through targeted encryption attacks against organizations across multiple sectors. The group's origin and specific affiliations remain largely undocumented in public threat intelligence reports, though their operational patterns suggest they function as an independent ransomware operation rather than a established Ransomware-as-a-Service model. Monti's attack methodology and specific technical details regarding initial access vectors, encryption methods, and data exfiltration practices have not been extensively documented in publicly available threat intelligence from major security firms or government agencies. The group has reportedly compromised approximately 110 victims since their emergence, with their targeting primarily focused on organizations in the United States, Canada, Germany, France, and Italy, showing a particular preference for business services, healthcare, manufacturing, and technology sectors. Limited public documentation exists regarding specific notable campaigns or high-profile attacks attributed to Monti, reflecting the group's relatively recent emergence and lower profile compared to more established ransomware operations. As of current reporting, Monti appears to remain an active threat, though comprehensive intelligence on their current operational status is limited in publicly available sources from major cybersecurity organizations and law enforcement agencies. The group has been linked to 110 public disclosures across our corpus. First observed on a leak site on December 7, 2022; most recent post May 8, 2025. The operation is currently inactive.

Timeline of this disclosure

October 23, 2023University of Defence - Full Leak listed by Montion the group's public leak site

Other recent disclosures by Monti

Monti has been linked to 110 public victims on Darkfield. A sample of the most recent:

See the full Monti dossier →

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 1,082 disclosures indexed across all operators we track. Geographically, University of Defence - Full Leak is reported in Czech Republic, a country with 34 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Monti means University of Defence - Full Leak 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 Monti'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.