Was Premise Health hit by ransomware?

Premise Health was listed by the alphv ransomware operation, 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 alphv ransomware group?

alphv 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 Premise Health breach?

alphv published data attributed to Premise Health. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Premise Health

Claimed by Alphv · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

ListedNov 15, 2023
Data leakeddate unknown

At a glance

Group: Alphv
Status: Data leaked
Sector: Healthcare
Listed on leak site: Nov 15, 2023

About the victim

AI dossier — public-source company profile

Premise Health is a national direct healthcare provider operating 800+ wellness centers across 46 states and Guam. They deliver advanced primary care, occupational health, pharmacy, behavioral health, and wellness services to over 400 employer, union, and health plan partners, serving millions of members with a focus on reducing costs and improving health outcomes.

Industry: Healthcare Services & Employer Direct Care

Attack summary

Severity: high — Premise Health operates a major healthcare platform serving millions of members across employer, union, and health plan networks, and handles sensitive health records, member data, and PHI at scale. Data published status confirms exfiltration. Absence of detailed proof or data inventory prevents 'critical' classification, but the scale and sensitivity of a national healthcare provider's datasets warrant 'high' severity.

The ALPHV ransomware group claims to have attacked Premise Health and published data. The post provides no specifics on the scope of exfiltration, encryption status, or data categories compromised.

high

What the group claims

Premise Health is the worlds leading direct healthcare provider. Their transformative approach focuses on clinical expertise, easy access to care, and a seamless and simple member experience.

Sources

Source

Indexed 3 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 alphv

ALPHV, also known as BlackCat or Noberus, is a financially motivated ransomware group that emerged in September 2021 and rapidly established itself as one of the most sophisticated and prolific ransomware operations observed by researchers at Mandiant, CISA, and the FBI. The group is suspected to have Russian-speaking origins and operates as a Ransomware-as-a-Service (RaaS) platform, with well-documented links to former affiliates of the DarkSide and BlackMatter ransomware operations, suggesting a continuity of personnel and tradecraft across these successive rebrand events. ALPHV is technically distinguished by its use of Rust-based ransomware — an uncommon choice at the time of its emergence — which enabled cross-platform attacks against Windows, Linux, and VMware ESXi environments; the group employs multiple initial access vectors including compromised credentials, phishing, and exploitation of unpatched vulnerabilities, and routinely conducts double and triple extortion by exfiltrating sensitive data prior to encryption and threatening victims with public disclosure on their dedicated leak site, with some cases involving additional pressure through direct contact with victim customers and regulators. ALPHV has claimed responsibility for high-profile attacks against MGM Resorts International, Caesars Entertainment, Reddit, and healthcare provider Change Healthcare — the latter representing one of the most disruptive cyberattacks on the U.S. healthcare sector on record, with a reported ransom payment of approximately $22 million — and has accumulated over 731 known victims across the United States, Canada, Australia, the United Kingdom, and Germany, with particular concentration in business services, manufacturing, healthcare, technology, and financial services sectors. In December 2023, the FBI and international partners conducted a disruption operation against ALPHV's infrastructure and released a decryption tool for victims; however, the group subsequently attempted to rebrand and continued operations before an apparent final collapse in March 2024, following an alleged exit scam against affiliates after the Change Healthcare ransom payment, with law enforcement officially attributing the group's infrastructure seizure shortly thereafter. The group has been linked to 731 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post March 3, 2024. The operation is currently inactive.

Also tracked as: BlackCat, Noberus.

Timeline of this disclosure

November 15, 2023Premise Health listed by alphvon the group's public leak site

Other recent disclosures by alphv

alphv has been linked to 731 public victims on Darkfield. A sample of the most recent:

See the full alphv dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track.

If your organisation is affected

A listing by alphv means Premise Health 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 alphv'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.