Disclosure context

About interlock

Interlock is a recently emerged ransomware group that began operations in October 2024, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's country of origin and potential affiliations remain unclear given their recent emergence, with insufficient public documentation to determine whether they operate as an independent entity or under a Ransomware-as-a-Service model. Limited public information exists regarding their specific attack methodologies, initial access vectors, or encryption techniques, as major cybersecurity firms and law enforcement agencies have not yet published comprehensive technical analyses of their operations. Since beginning operations, Interlock has reportedly compromised approximately 100 victims, with their targeting primarily focused on organizations in English-speaking countries including the United States, Canada, United Kingdom, and Australia, as well as Italy, while demonstrating a preference for attacking education, manufacturing, healthcare, and public sector entities. The group remains active as of late 2024, though comprehensive threat intelligence profiles from established security research organizations have not yet been published due to the group's recent emergence in the threat landscape. The group has been linked to 109 public disclosures across our corpus. First observed on a leak site on October 13, 2024; most recent post May 11, 2026. The operation is currently active.

Timeline of this disclosure

April 15, 2026Uniwersytet Warszawski listed by interlockon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 694 disclosures indexed across all operators we track. Geographically, Uniwersytet Warszawski is reported in PL, a country with 8 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Uniwersytet Warszawski

Claimed by interlock · listed 1 month ago

35d

Age

since listed · data leaked

Status timeline

Listed
Apr 15, 2026
Data leaked

At a glance

Group: interlock
Status: Data leaked
Country: PL
Sector: Education
Listed on leak site: Apr 15, 2026

About the victim

AI dossier — public-source company profile

Uniwersytet Warszawski (University of Warsaw) is one of Poland's largest and most prestigious public research universities, located in Warsaw. It offers over 300 study programmes across undergraduate, graduate, and doctoral levels, and is a member of the 4EU+ European university alliance. The university has tens of thousands of students and a substantial academic and administrative staff.

Industry: Higher Education
Address: Krakowskie Przedmieście 26/28, 00-927 Warsaw, Poland
Employees: 5001-10000
Founded: 1816

Attack summary

Severity: high — Confirmed exfiltration and publication of PII belonging to students and academic staff at a major public university, including personal records and academic work, constitutes significant sensitive data exposure at institutional scale.

The Interlock ransomware group claims to have exfiltrated data from the Faculty of Management at the University of Warsaw, stating that data on students, instructors, and professors, as well as student projects and academic papers, was leaked. The disclosure status indicates data has been published.

high

Data the group says was taken

AI dossier — extracted from the leak post

Student personal data
Instructor and professor data
Student projects
Academic papers and theses

What the group claims

The Faculty of Management at the University of Warsaw is a leading institution in the field of business education, offering a wide range of undergraduate and graduate programs that combine theory with practical experience. However, it is not known for its high level of security and data storage reliability, resulting in the leak of data on students, instructors, and leading professors, as well as student projects and papers.

Sources

Victim siteuw.edu.pl
Leak posthttp://efs3fkrjyvqsk7nugzteelo5i5jxoch5ziqhf37dzmmlmzzlymhawmid.onion/index.php?p=

Source

Indexed 1 month 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.