Was Mackay Hospital hit by ransomware?

Mackay Hospital was listed by the crazyhunter ransomware operation (Taiwan), 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 crazyhunter ransomware group?

crazyhunter 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 Mackay Hospital breach?

crazyhunter published data attributed to Mackay Hospital. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Mackay Hospital

Claimed by Crazyhunter · listed 1 year ago

16m

Age

since listed · data leaked

Status timeline

ListedMar 9, 2025
Data leakeddate unknown

At a glance

Group: Crazyhunter
Status: Data leaked
Country: Taiwan
Sector: Healthcare
Listed on leak site: Mar 9, 2025

About the victim

AI dossier — public-source company profile

Mackay Hospital is a healthcare institution operating under the domain mmh.org.tw, indicating a Taiwan-based hospital facility. No additional public information was available to determine scale, founding date, or specific service lines.

Industry: Healthcare - Hospital Services

Attack summary

Severity: medium — Healthcare sector data breach with confirmed data publication, but lack of detail on data type, scale, or proof artifacts limits confidence in severity assessment. Hospital breaches typically involve sensitive PII and medical records, warranting medium-to-high concern pending clarification.

The crazyhunter group claims responsibility for an attack on Mackay Hospital. The leak post provides minimal detail; disclosure status indicates data has been published, but the nature of exfiltration, encryption, or operational impact is not specified in the available post excerpt.

medium

What the group claims

Mackay Hospital

Sources

Victim sitemmh.org.tw
Leak posthttp://7i6sfmfvmqfaabjksckwrttu3nsbopl3xev2vbxbkghsivs5lqp4yeqd.onion/product/3

Source

Indexed 1 year 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 crazyhunter

CrazyHunter is a recently emerged ransomware group first observed in March 2025, operating with apparent financial motivations based on their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to limited public documentation, though their operational focus on Taiwan and the United States suggests either geographic proximity to these regions or specific economic interests in these markets. Based on available data, CrazyHunter has compromised at least 10 victims across healthcare, manufacturing, technology, and consumer services sectors, demonstrating a broad targeting approach typical of opportunistic ransomware operations. The group's attack methodology, encryption techniques, and specific tools remain undocumented in public threat intelligence reporting from major security firms and government agencies. Given the recent emergence of this group and limited public reporting, notable campaigns and specific high-profile incidents have not been documented by reputable security researchers or law enforcement agencies. CrazyHunter appears to remain active as of the latest available intelligence, though the group's operational scale and sophistication cannot be definitively assessed due to insufficient public documentation. The group has been linked to 10 public disclosures across our corpus. First observed on a leak site on March 9, 2025; most recent post March 30, 2025. The operation is currently inactive.

Timeline of this disclosure

March 9, 2025Mackay Hospital listed by crazyhunteron the group's public leak site

Other recent disclosures by crazyhunter

crazyhunter has been linked to 10 public victims on Darkfield. A sample of the most recent:

See the full crazyhunter dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, Mackay Hospital is reported in Taiwan, a country with 55 ransomware disclosures in our corpus.

If your organisation is affected

A listing by crazyhunter means Mackay Hospital 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 crazyhunter'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.