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, 2026gannons.co.uk listed by apt73on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, gannons.co.uk is reported in GB, a country with 309 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

Gannons Commercial Law Limited

listed as gannons.co.uk · Claimed by apt73 · listed 23 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: GB
Sector: Business Services
Listed on leak site: Apr 27, 2026

About the victim

AI dossier — public-source company profile

Gannons Commercial Law Limited (trading as Gannons Solicitors) is a London-based boutique commercial law firm specialising in business contracts, corporate transactions, employment law, corporate tax, commercial disputes, and share plans. The firm serves entrepreneurs, directors, shareholders, and investors across the UK and internationally, including an Asia desk covering Hong Kong, China, Singapore, and Thailand. From April 2026, Gannons is joining the international private client firm Burlingtons Group.

Industry: Commercial & Corporate Law
Address: London, United Kingdom
Employees: 11-50

Attack summary

Severity: critical — A commercial law firm holds highly sensitive regulated data including legally privileged client communications, financial records, corporate transaction documents, and personal data of directors, shareholders, and investors. Data publication by the threat actor at a law firm represents a critical breach of legal professional privilege and likely involves PII at scale alongside confidential business data.

The ransomware group APT73 claims to have compromised Gannons Commercial Law Limited, with the disclosure status recorded as data_published, indicating that exfiltrated data has been released or made available. The leak post references the firm's founding history and likely contains sensitive client and legal data given the nature of a commercial law practice.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files and correspondence
Corporate transaction documents
Employment law case files
Confidentiality and NDA agreements
Shareholder and director records
Tax and financial documents
Internal firm communications

What the group claims

Gannons Commercial Law Limited Catherine Gannon, then a tax solicitor at a large US law firm, lo...

Sources

Victim sitegannons.co.uk
Leak posthttp://basherq53eniermxovo3bkduw5qqq5bkqcml3qictfmamgvmzovykyqd.onion/page_company.php?id=51

Source

Indexed 23 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.