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Archer Health

Claimed by Killsecurity · listed 10 months ago

600 GB
Data size
10m
Age
since listed · data leaked

Status timeline

  1. ListedSep 7, 2025
  2. Data leakeddate unknown

At a glance

Group
Killsecurity
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Sep 7, 2025
Data size
600 GB

About the victim

AI dossier — public-source company profile

Archer Health (archerhealthinc.com) is a certified home health and palliative care agency operating in the United States, providing in-home nursing, therapy, and aide services to patients with chronic and serious conditions. The company takes a personalized, multilingual approach to care and has a partnership with Palomar Health and Palomar Health Medical Group to improve home health outcomes. It serves patients of all ethnicities and offers referral services aimed at reducing unnecessary hospitalizations.

Industry
Home Health & Palliative Care

Attack summary

Severity: critical — Archer Health is a healthcare provider handling sensitive patient medical and personal data; a confirmed data_published status from a ransomware group in the healthcare sector almost certainly involves regulated health information (HIPAA-protected PHI/PII), warranting a critical severity rating.

KillSecurity claims to have attacked Archer Health and the disclosure status is listed as data_published, indicating exfiltration and publication of data; however, the group's leak post contains no further detail on the specific nature or volume of data stolen.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient health records (inferred)
  • Personal identifiable information (inferred)
  • Healthcare/clinical data (inferred)

What the group claims

N/A

The leak post

captured from the group's site
Founded in 1997, iCare Software, based in the United States, delivers innovative management solutions for childcare and afterschool programs. Serving childcare centers, preschools, afterschool programs, and multi-site operations, iCare automates critical tasks like attendance tracking, staff scheduling, tuition collection, and compliance reporting. Its unique offerings include AI-driven analytics, business intelligence dashboards, and CRM tools to boost enrollment and staff retention. With seamless data migration and robust back-end technology, iCare empowers providers to focus on quality care while streamlining operations and driving growth.
Cadorim simplifies money transfers to Mauritania, offering a secure, user-friendly platform for individuals and businesses. With a focus on speed, affordability, and accessibility, Cadorim enables seamless transactions in just three clicks, available around the clock. The company ensures maximum security for every transfer, provides competitive exchange rates with no fees, and processes transactions instantly. Headquartered in Brussels, Belgium, with operations in Nouakchott, Mauritania, Cadorim serves customers seeking reliable, cost-effectiv…

Sources

Source

Indexed 10 months 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 Killsecurity

Killsecurity is a relatively new ransomware group that emerged in March 2024, operating with apparent financial motivations and demonstrating rapid expansion in their victim targeting. The group's origin and affiliations remain unclear due to limited public documentation from major threat intelligence sources, though their global targeting pattern suggests a sophisticated operation. Based on available victim data, Killsecurity has compromised 276 organizations primarily across the United States, India, United Kingdom, Brazil, and Belgium, with a particular focus on healthcare, technology, business services, and financial sectors. The group's attack methodology, encryption techniques, and specific tools remain undocumented in public threat intelligence reports from established security firms. Notable campaigns and high-profile victims have not been extensively documented by major cybersecurity organizations or law enforcement agencies, likely due to the group's recent emergence. Killsecurity appears to remain active as of current reporting, though comprehensive analysis of their operations is limited by the lack of detailed technical documentation from reputable threat intelligence sources. The group has been linked to 277 public disclosures across our corpus. First observed on a leak site on March 21, 2024; most recent post May 15, 2026. The operation is currently active.

Timeline of this disclosure

  • September 7, 2025Archer Health listed by Killsecurityon the group's public leak site
Data size
600 GB

Other recent disclosures by Killsecurity

Killsecurity has been linked to 277 public victims on Darkfield. A sample of the most recent:

See the full Killsecurity 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. Geographically, Archer Health is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Killsecurity means Archer 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.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Killsecurity'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.