Disclosure context

About Knight

Knight is a relatively new ransomware group that emerged in September 2023, operating with primarily financial motivations and demonstrating a focus on targeting critical infrastructure and high-value sectors. The group's origin and specific affiliations remain largely undocumented in public threat intelligence reports, though their operational patterns suggest they operate as an independent entity rather than a established ransomware-as-a-service model. With 48 known victims since their emergence, Knight has shown a preference for targeting organizations across the United States, Brazil, Italy, Spain, and Germany, with particular focus on healthcare, manufacturing, media, and government sectors. Their attack methodology and specific technical capabilities have not been extensively documented by major security firms, though their targeting of healthcare and government entities suggests they employ effective initial access techniques and likely utilize double extortion tactics common among contemporary ransomware groups. While specific notable campaigns have not been widely publicized by CISA, FBI, or major security researchers, the group's consistent activity across multiple countries and high-value sectors indicates sustained operational capability. Knight appears to remain active as of current reporting, though detailed technical analysis and specific law enforcement actions against the group have not been publicly documented by authoritative sources. The group has been linked to 48 public disclosures across our corpus. First observed on a leak site on September 6, 2023; most recent post February 12, 2024. The operation is currently inactive.

Timeline of this disclosure

December 16, 2023Crace Medical Centre listed by Knighton the group's public leak site

Data size: 30 GB

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, Crace Medical Centre is reported in Australia, a country with 368 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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Crace Medical Centre

Claimed by Knight · listed 2 years ago

30 GB

Data size

29m

Age

since listed · data leaked

Status timeline

Listed
Dec 16, 2023
Data leaked

At a glance

Group: Knight
Status: Data leaked
Country: Australia
Sector: Healthcare
Listed on leak site: Dec 16, 2023
Data size: 30 GB

About the victim

AI dossier — public-source company profile

Crace Medical Centre is a general practice medical centre located in Crace, ACT, Australia. It supports independent GPs who provide mixed-billing primary care services to patients across a wide range of medical needs. The centre operates seven days a week including after-hours, serving a local residential community.

Industry: General Practice & Primary Healthcare
Address: Shop 2 Crace Central, Crace ACT 2911, Australia
Employees: 1-10

Attack summary

Severity: critical — A healthcare provider has had 30 GB of data exfiltrated from clinical and administrative systems, with status listed as data_published. The data almost certainly contains regulated patient health information (medical records, PII) at a primary care practice, constituting a critical breach of sensitive personal and medical data under Australian Privacy Act obligations.

The Knight ransomware group claims to have exfiltrated 30 GB of data from Crace Medical Centre's internal network, including data from multiple doctor workstations, servers, and reception systems, and is threatening to release sensitive data if management does not engage in their chat.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Doctor workstation files (DOCTOR1–DOCTOR7)
Server data (SERVER, SERVERB)
Reception system files (RECEPTION1, RECEPTION2)
Remote access data (REMOTE)
Patient records (inferred from healthcare context)
Sensitive clinical/administrative data

What the group claims

30 GB of data. We wait you in the chat.Phone: (02) 6241 0249.Oops, what's all this about? "Nothing happened?", "What do you want us to do?".You have "polite" reception staff. Wait for management in the chat room or we'll start releasing sensitive data from your sources.REMOTE:SERVER:DOCTOR2:DOCTOR1:DOCTOR6:SERVERB:DOCTOR5:REMOTE:RECEPTION1:RECEPTION2:DOCTOR3:DOCTOR7:SERVERB:

Sources

Source

Indexed 2 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.