Was CannonDesign hit by ransomware?

CannonDesign was listed by the dunghill ransomware operation (United States), 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 dunghill ransomware group?

dunghill 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 CannonDesign breach?

dunghill published data attributed to CannonDesign. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

CannonDesign

Claimed by Dunghill · listed 3 years ago

34m

Age

since listed · data leaked

Status timeline

ListedSep 26, 2023
Data leakeddate unknown

At a glance

Group: Dunghill
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Sep 26, 2023

About the victim

AI dossier — public-source company profile

CannonDesign is a global architecture, engineering, and consulting firm headquartered in the United States. The firm delivers services across a broad range of project types including hospitals, corporate offices, higher education, hospitality, sports facilities, and science and research buildings. It has been recognized by Fast Company as one of the 10 most innovative architecture firms in the world in 2017 and 2019.

Industry: Architecture, Engineering & Consulting
Employees: 1001-5000

Attack summary

Severity: high — Data has been published by the threat actor, confirming exfiltration. CannonDesign works extensively with healthcare, government, and education clients, meaning exfiltrated data likely includes sensitive project and client information of significant business and potentially regulatory consequence.

The Dunghill ransomware group claims to have attacked CannonDesign and has published data (disclosed status: data_published), indicating exfiltration of company data. No specific ransom amount or data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company internal data
Project documentation
Client records
Employee information

What the group claims

CannonDesign is a global architecture, engineering and consulting practice that provides services for a range of project types, including hospitals and medical centers, corporate headquarters and commercial office buildings, higher education and PK-12 education facilities, hotels and hospitality, mixed-use, sports facilities, and science and research buildings. In 2017 and 2019, Fast Company named CannonDesign one of the 10 most innovative architecture firms in the world.

Sources

Victim sitecannondesign.com
Leak posthttp://p66slxmtum2ox4jpayco6ai3qfehd5urgrs4oximjzklxcol264driqd.onion/lot9.html

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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About dunghill

The dunghill ransomware group is a relatively new financially-motivated cybercriminal operation that emerged in April 2023, with documented attacks against 16 victims across multiple countries and sectors. Based on limited public reporting, the group's origin and affiliations remain unclear, though their targeting patterns suggest they operate as an independent entity rather than a established ransomware-as-a-service operation. The group has demonstrated a preference for targeting business services and technology sectors, with attacks documented across the United Kingdom, United States, Brazil, Bolivia, and Taiwan, indicating either a broad opportunistic approach or the use of initial access brokers to expand their geographic reach. While specific technical details about their attack methodology, encryption techniques, and extortion tactics have not been extensively documented in public threat intelligence reports, their multi-country victim distribution suggests they employ common initial access vectors such as phishing, credential theft, or exploitation of internet-facing vulnerabilities. No major high-profile attacks or significant law enforcement actions against the dunghill group have been publicly reported, likely due to their recent emergence and relatively small victim count compared to more established ransomware operations. As of current reporting, the group appears to remain active with limited public visibility into their operations. The group has been linked to 16 public disclosures across our corpus. First observed on a leak site on April 10, 2023; most recent post July 1, 2025. The operation is currently inactive.

Timeline of this disclosure

September 26, 2023CannonDesign listed by dunghillon the group's public leak site

Other recent disclosures by dunghill

dunghill has been linked to 16 public victims on Darkfield. A sample of the most recent:

See the full dunghill 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, CannonDesign is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by dunghill means CannonDesign 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.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on dunghill'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.