Disclosure context

About Kairos

Kairos is a recently emerged ransomware group first observed in November 2024 that appears to be primarily financially motivated, having targeted approximately 75 victims across multiple sectors and countries. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, and it is unknown whether they operate as a Ransomware-as-a-Service model or as an independent entity. Based on available targeting data, Kairos appears to focus their operations primarily on English-speaking countries including the United States, Australia, United Kingdom, and Canada, with additional activity observed in Germany, while their sector targeting spans education, healthcare, agriculture and food production, and business services, though specific attack methodologies, initial access vectors, and encryption techniques have not been publicly documented by major security organizations. Given the group's recent emergence in late 2024, there are no widely reported notable campaigns or high-profile incidents documented by CISA, FBI, or established security research firms. As of current reporting, Kairos appears to remain active based on their recent first observation date, though comprehensive threat intelligence profiles from major security organizations have not yet been published due to the group's nascent operational timeline. The group has been linked to 86 public disclosures across our corpus. First observed on a leak site on November 13, 2024; most recent post May 15, 2026. The operation is currently active.

Timeline of this disclosure

March 16, 2026Folet & Rivoire listed by Kairoson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Folet & Rivoire is reported in France, a country with 472 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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Folet & Rivoire

Claimed by Kairos · listed 2 months ago

Age

since listed · data leaked

Status timeline

Listed
Mar 16, 2026
Data leaked

At a glance

Group: Kairos
Status: Data leaked
Country: France
Sector: Not Found
Listed on leak site: Mar 16, 2026

About the victim

AI dossier — public-source company profile

Folet & Rivoire is a French law firm with a team of experienced lawyers capable of addressing the legal concerns of both individuals and businesses. The firm operates across multiple areas of law, offering a cross-disciplinary approach to client legal matters. It is based in France.

Industry: Legal Services & Law Firm

Attack summary

Severity: high — The victim is a law firm, meaning exfiltrated data almost certainly includes privileged legal communications, PII of individual clients, and confidential business client information — all sensitive regulated data. The status is 'data_published', confirming exfiltration and disclosure.

The Kairos ransomware group claims to have compromised Folet & Rivoire and has published data, though no specific data volume or ransom amount has been stated. The leak post text appears to be drawn directly from the firm's own descriptive content, suggesting access to internal or web-sourced materials.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files
Personal data of individuals
Business client records
Legal correspondence
Case documentation

What the group claims

Notre équipe d'avocats expérimentés, est à même de répondre à la plupart des préoccupations tant des particuliers que des entreprises. Son intervention dans les différents domaines du droit lui permet une approche transversale des solutions à apporter aux problèmes de ses clients.

Source

Indexed 2 months 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.