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ATMCo

Claimed by Trigona · listed 2 years ago

28m
Age
since listed · data leaked

Status timeline

  1. ListedMar 15, 2024
  2. Data leakeddate unknown

At a glance

Group
Trigona
Status
Data leaked
Country
United States
Sector
Technology
Listed on leak site
Mar 15, 2024

About the victim

AI dossier — public-source company profile

ATMCo is a tax management firm based in Broken Arrow, Oklahoma, offering tax preparation, bookkeeping, accounting, and tax audit representation services. The company operates cloud-based bookkeeping systems and has over 30 years of experience, serving both individual and business clients.

Industry
Tax Preparation, Bookkeeping & Accounting Services
Address
2220 W Houston St Ste A, Broken Arrow, Oklahoma 74012

Attack summary

Severity: medium — Data publication confirmed (disclosed_status: data_published), but no proof files/screenshots are advertised in the leak post. The likely exposure of client tax records and financial data warrants medium severity despite absence of proof evidence.

Trigona claims to have attacked ATMCo and published data. The post does not specify what data was exfiltrated or whether encryption occurred.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Client tax records
  • Financial data
  • Bookkeeping records
  • Personal identifying information

What the group claims

ATMCo is a reputable tax management company based in Broken Arrow, Oklahoma. With a commitment to simplifying tax-related processes for businesses and individuals, ATMCo offers comprehensive services in tax preparation, bookkeeping, and accounting. Company is headquartered at 2220 W Houston St Ste A, Broken Arrow, Oklahoma. Situated in a convenient location, the company is easily accessible to clients seeking professional tax management services.

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 Trigona

Trigona is a relatively new ransomware group that emerged in April 2023, operating with primarily financial motivations and targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their targeting patterns suggest they operate as an independent entity rather than a established Ransomware-as-a-Service operation. Trigona employs double extortion tactics, combining data encryption with data exfiltration and threats to publish stolen information on leak sites, though specific details about their initial access vectors and encryption methods have not been extensively documented by major security researchers. The group has claimed 49 victims as of current reporting, with their attacks concentrated in the United States, Australia, Mexico, France, and Indonesia, primarily targeting business services, manufacturing, healthcare, technology, and finance sectors. Given the group's recent emergence in 2023, there are no widely reported major campaigns or significant law enforcement actions documented by CISA, FBI, or established threat intelligence firms. Trigona appears to remain active as of current intelligence assessments, though the limited public documentation reflects their relatively recent entry into the ransomware landscape. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 17, 2023; most recent post March 30, 2024. The operation is currently inactive.

Timeline of this disclosure

  • March 15, 2024ATMCo listed by Trigonaon the group's public leak site

Other recent disclosures by Trigona

Trigona has been linked to 49 public victims on Darkfield. A sample of the most recent:

See the full Trigona dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, ATMCo is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Trigona means ATMCo 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 Trigona'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.