high severity February 12, 2026 · 3 min read Unverified claim — what this is

Halcyon Technologies Listed by Sinobi Ransomware Group

If you are a customer of Halcyon Technologies, here’s what is being claimed, and what it would mean for you.

Halcyon is the industrys first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware. Halcyon is built by offensive security experts to stop attackers.
— from Sinobi’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Halcyon Technologies Listed by Sinobi Ransomware Group

On February 10, 2026, Halcyon Technologies appeared on the leak site of the sinobi ransomware group. The listing indicates that internal files were exfiltrated during a ransomware attack on the company, which builds specialized anti-ransomware security software.

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What Public Reporting Shows

Public reporting indicates the incident involves data exfiltration followed by the traditional ransomware playbook of encryption and extortion. No confirmed victim count has been released, and the precise volume or sensitivity of the stolen files remains unclear from available reporting. The leak site posting itself serves as the primary evidence that negotiations between Halcyon and the attackers either failed or never occurred.

February 10, 2026 marks the public disclosure date on the sinobi leak portal. The exposed material consists of internal files; specific categories such as customer databases, employee records, or source code have not been detailed in open sources.

Why This Matters for You and Your Family

When a cybersecurity company is breached, the irony is clear: the very organization trusted to stop ransomware has had its own internal data taken. For ordinary people, the concern is indirect but real. If your employer, school, healthcare provider, or any service you rely on uses Halcyon’s platform, your information could sit inside the very networks now compromised.

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value redacted in this sampleage, relatives, address historySpokeo

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Report details & sourcing

Attributed to Sinobi · 274 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed February 12, 2026

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Threat-actor tracker

Sinobi — 274 incidents tracked

Every breach we've attributed to Sinobi, in one running log. See who else they've hit →

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