Was formosacpa.com.tw hit by ransomware?

formosacpa.com.tw was listed by the Kairos ransomware operation (Taiwan), 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 Kairos ransomware group?

Kairos 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 formosacpa.com.tw breach?

Kairos published data attributed to formosacpa.com.tw. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Formosa Certified Public Accountants

listed as formosacpa.com.tw · Claimed by Kairos · listed 2 years ago

20m

Age

since listed · data leaked

Status timeline

ListedNov 13, 2024
Data leakeddate unknown

At a glance

Group: Kairos
Status: Data leaked
Country: Taiwan
Sector: Financial
Listed on leak site: Nov 13, 2024

About the victim

AI dossier — public-source company profile

Formosa Certified Public Accountants is a Taiwan-based accounting and audit firm providing professional accounting services. The firm operates under the domain formosacpa.com.tw, indicating local market focus.

Industry: Professional Services & Accounting

Attack summary

Severity: high — Accounting firms handle sensitive client financial and tax data. Confirmed data publication by ransomware group indicates exfiltration of regulated financial information at scale, typical for this sector.

Kairos group claims to have breached Formosa Certified Public Accountants and published data. The specific nature of exfiltration (data only vs. encryption) and exact data categories are not detailed in the available leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client financial records
Accounting documentation
Tax preparation files

What the group claims

taiwan - Formosa Certified Public Accountants

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.

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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 88 public disclosures across our corpus. First observed on a leak site on November 13, 2024; most recent post June 1, 2026. The operation is currently active.

Timeline of this disclosure

November 13, 2024formosacpa.com.tw listed by Kairoson the group's public leak site

Other recent disclosures by Kairos

Kairos has been linked to 88 public victims on Darkfield. A sample of the most recent:

See the full Kairos dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial sector, which has 426 disclosures indexed across all operators we track. Geographically, formosacpa.com.tw is reported in Taiwan, a country with 71 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Kairos means formosacpa.com.tw 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.
Monitor for the data appearing on Kairos'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.