Disclosure context

About apt73

APT73 is a recently emerged ransomware group that began operations in April 2024, with financial motivation as their primary driver based on their targeting patterns across multiple high-value sectors. The group has demonstrated rapid growth in their operational tempo, accumulating 78 documented victims within their first months of activity. Their targeting methodology shows a preference for English-speaking markets and major economies, with the United Kingdom and United States representing their primary focus areas, followed by significant activity in India, Brazil, and France. The group exhibits a clear preference for high-value sectors including business services, technology, financial services, and healthcare organizations, suggesting a calculated approach to victim selection based on potential payment capability and operational impact. Given the group's recent emergence and limited public documentation from major threat intelligence sources, specific details regarding their initial access vectors, tooling, encryption methods, or organizational structure remain largely unconfirmed by authoritative sources such as CISA, FBI, or established security research firms. The group's current operational status appears active based on the timeline of their emergence, though comprehensive analysis of their capabilities and infrastructure requires additional intelligence gathering and documentation by security researchers. The group has been linked to 141 public disclosures across our corpus. First observed on a leak site on April 22, 2024; most recent post April 27, 2026. The operation is currently inactive.

Also tracked as: Eraleign.

Timeline of this disclosure

April 27, 2026mahidol.ac.th listed by apt73on 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, mahidol.ac.th is reported in TH, a country with 45 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

← All victims

Mahidol University

listed as mahidol.ac.th · Claimed by apt73 · listed 24 days ago

23d

Age

since listed · data leaked

Status timeline

Listed
Apr 27, 2026
Data leaked

At a glance

Group: apt73
Status: Data leaked
Country: TH
Sector: Education
Listed on leak site: Apr 27, 2026

About the victim

AI dossier — public-source company profile

Mahidol University is a major public research university in Thailand, headquartered in Salaya, Nakhon Pathom, with additional campuses in Bangkok. It is one of Thailand's leading universities, particularly renowned for its medical, health sciences, and research programmes, and hosts tens of thousands of students and staff.

Industry: Public Research University
Address: 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand
Employees: 10000+
Founded: 1969

Attack summary

Severity: high — Mahidol University is a large public research institution handling significant volumes of PII (student, staff, patient records given its medical faculty), and data has been published (disclosed status: data_published), indicating confirmed exfiltration of potentially sensitive institutional and personal data at scale.

The group APT73 claims to have compromised Mahidol University and has published data as part of a disclosed leak, though the specific nature of the attack (encryption, exfiltration, or both) and the exact volume of data are not detailed in the truncated post.

high

Data the group says was taken

AI dossier — extracted from the leak post

University records
Student data
Staff/faculty data
Research data

What the group claims

Mahidol University is a major public research university established in Thailand with deep histor...

Sources

Victim sitemahidol.ac.th
Leak posthttp://basherq53eniermxovo3bkduw5qqq5bkqcml3qictfmamgvmzovykyqd.onion/page_company.php?id=127

Source

Indexed 24 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.