Was www.witheyaddison.com hit by ransomware?

www.witheyaddison.com was listed by the RansomHub ransomware operation (Canada), 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 RansomHub ransomware group?

RansomHub 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 www.witheyaddison.com breach?

RansomHub published data attributed to www.witheyaddison.com. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Withey Addison LLP

listed as www.witheyaddison.com · Claimed by RansomHub · listed 1 year ago

16m

Age

since listed · data leaked

Status timeline

ListedFeb 21, 2025
Data leakeddate unknown

At a glance

Group: RansomHub
Status: Data leaked
Country: Canada
Sector: Financial Services
Listed on leak site: Feb 21, 2025

About the victim

AI dossier — public-source company profile

Withey Addison LLP is a professional services accounting firm based in Ontario, Canada. The firm provides corporate taxation, business advisory services, financial planning, and related accounting services to clients across various industries.

Industry: Accounting & Professional Services

Attack summary

Severity: medium — Data published status confirmed, but no specific proof files detailed in the excerpt. Financial/accounting firm status suggests client PII and sensitive business data at risk, but without confirmation of exfiltration scale or proof inventory, cannot elevate to 'high'.

RansomHub claims to have attacked Withey Addison LLP. The specific data exfiltrated or encryption details are not described in the available leak post excerpt.

medium

Data the group says was taken

AI dossier — extracted from the leak post

client financial records
tax documentation
business advisory files

Original description

AI-summarised, not from the leak post

Withey Addison LLP, often mentioned as www.witheyaddison.com, is a professional service accounting firm based in Ontario, Canada. It offers a variety of finance and accounting services including corporate taxation, business advisory services, financial planning and more. The firm is committed to providing superior service to clients in various industries.

Sources

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 RansomHub

RansomHub is a financially-motivated ransomware group that emerged in February 2024 and has rapidly established itself as a significant threat, compromising over 1,000 victims within its first year of operation. The group operates as a Ransomware-as-a-Service (RaaS) model, though their specific country of origin and potential affiliations with other cybercriminal organizations remain under investigation by security researchers. RansomHub employs double extortion tactics, stealing sensitive data before encrypting victims' systems and threatening to leak the information if ransom demands are not met, with their attacks primarily targeting organizations in the United States, Brazil, Canada, United Kingdom, and Italy. The group has demonstrated a particular focus on business services, technology, manufacturing, and healthcare sectors, suggesting they prioritize targets with both high revenue potential and critical operational dependencies that increase the likelihood of ransom payment. Despite their recent emergence, RansomHub has quickly gained notoriety for their aggressive targeting approach and high victim count, with security agencies including CISA and FBI monitoring their activities as part of ongoing ransomware threat assessments. As of current reporting, RansomHub remains active and continues to recruit affiliates for their RaaS operation while expanding their victim base across multiple industries and geographic regions. The group has been linked to 1,032 public disclosures across our corpus. First observed on a leak site on February 10, 2024; most recent post March 31, 2025. The operation is currently inactive.

Also tracked as: RANSOM HUB.

Timeline of this disclosure

February 21, 2025www.witheyaddison.com listed by RansomHubon the group's public leak site

Other recent disclosures by RansomHub

RansomHub has been linked to 1,032 public victims on Darkfield. A sample of the most recent:

See the full RansomHub dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track. Geographically, www.witheyaddison.com is reported in Canada, a country with 1,055 ransomware disclosures in our corpus.

If your organisation is affected

A listing by RansomHub means www.witheyaddison.com 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, CCCS (Canada), as required for your jurisdiction.
Monitor for the data appearing on RansomHub'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.