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h2o.ai

Claimed by Linkc · listed 1 year ago

17m
Age
since listed · data leaked

Status timeline

  1. ListedFeb 19, 2025
  2. Data leakeddate unknown

At a glance

Group
Linkc
Status
Data leaked
Country
United States
Sector
Technology
Listed on leak site
Feb 19, 2025

About the victim

AI dossier — public-source company profile

H2O.ai is an enterprise AI software company specializing in predictive analytics, generative AI, and machine learning platforms. They provide AutoML, LLM fine-tuning, and AI deployment solutions for regulated industries including financial services, telecommunications, and government sectors.

Industry
Artificial Intelligence & Machine Learning Software

Attack summary

Severity: critical — Confirmed exfiltration of multiple sensitive data categories: customer PII at scale (unanonymized training datasets), proprietary source code for core products, employee/customer correspondence, and internal business documents. Data published indicates no ransom demand and malicious release.

The linkc group claims to have exfiltrated unanonymized customer AI training datasets, complete source code from Git repositories (including driverless systems and GPT models), internal contracts and documentation, and backup copies of employee email accounts with customer correspondence.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • unanonymized customer AI training datasets
  • source code (driverless systems, GPT models)
  • internal contracts
  • customer personal data
  • project costs and documentation
  • employee email backups with customer correspondence

What the group claims

As a result of our operation, we have discovered the following concerning data: 1. Unanonymized customer datasets intended for AI training. 2. Full source code of programs from the Git repository, including code for driverless systems, GPT models, and others. 3. A substantial amount of internal information, including contracts, customer personal data, project costs, and project documentation. 4. Backup copies of employee email accounts containing customer correspondence.

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 linkc

Given the extremely limited public documentation available, linkc appears to be a newly emerged or minor ransomware operation first observed in February 2025, with only one documented victim to date. The group demonstrates a focus on the technology sector within the United States, though their country of origin, operational structure, and affiliations remain unknown due to insufficient intelligence reporting from major cybersecurity organizations and law enforcement agencies. Without documented analysis from CISA, FBI, Mandiant, or other reputable security researchers, the group's attack methodology, initial access vectors, encryption techniques, and extortion tactics cannot be definitively characterized. No notable campaigns, high-profile victims, or significant ransoms have been publicly reported for this group. The current operational status of linkc remains unclear due to the lack of comprehensive threat intelligence reporting on their activities. The group has been linked to 4 public disclosures across our corpus. First observed on a leak site on February 19, 2025; most recent post April 8, 2026. The operation is currently active.

Timeline of this disclosure

  • February 19, 2025h2o.ai listed by linkcon the group's public leak site

Other recent disclosures by linkc

linkc has been linked to 4 public victims on Darkfield. A sample of the most recent:

See the full linkc 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, h2o.ai is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by linkc means h2o.ai 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 linkc'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.