Cyberattack on AngMar Management Services Exposes 710GB of Sensitive Data
On August 11, 2026, the hacker group Interlock claimed responsibility for a cyberattack on AngMar Management Services, a company overseeing home health and hospice providers across 11 U.S. states. The group alleged it exfiltrated 710 gigabytes of data, including patient medical records and other sensitive information, though the breach remains unconfirmed by AngMar.
Cybersecurity monitoring site Ransomware.live reported the incident, noting that the stolen data may impact current and former AngMar employees, patients, and staff of its affiliated healthcare providers. Legal teams, including those partnered with ClassAction.org, are investigating the potential breach to determine if a class action lawsuit can be filed on behalf of affected individuals. Such a lawsuit could seek compensation for loss of privacy, financial damages, and other harms resulting from the exposure.
As of August 12, 2026, no further details on the breach’s scope, verification, or AngMar’s response have been released. Investigations are ongoing, with attorneys seeking input from those who believe their data may have been compromised.
Source: https://www.classaction.org/data-breach-lawsuits/angmar-august-2026
AngMar Management Services TPRM report: https://www.rankiteo.com/company/angmar-management-services
"id": "ang1786569359",
"linkid": "angmar-management-services",
"type": "Cyber Attack",
"date": "8/2026",
"severity": "100",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': 'Current and former employees, '
'patients, and staff of '
'affiliated healthcare providers',
'industry': 'Healthcare',
'location': 'United States',
'name': 'AngMar Management Services',
'type': 'Healthcare Management'}],
'data_breach': {'data_exfiltration': '710GB of data allegedly exfiltrated',
'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Patient medical records',
'Sensitive information']},
'date_detected': '2026-08-11',
'date_publicly_disclosed': '2026-08-11',
'description': 'On August 11, 2026, the hacker group *Interlock* claimed '
'responsibility for a cyberattack on AngMar Management '
'Services, a company overseeing home health and hospice '
'providers across 11 U.S. states. The group alleged it '
'exfiltrated 710 gigabytes of data, including patient medical '
'records and other sensitive information, though the breach '
'remains unconfirmed by AngMar. Legal teams are investigating '
'the potential breach for a class action lawsuit.',
'impact': {'data_compromised': '710GB of sensitive data, including patient '
'medical records',
'identity_theft_risk': 'High',
'legal_liabilities': 'Potential class action lawsuit for loss of '
'privacy and financial damages'},
'investigation_status': 'Ongoing',
'ransomware': {'data_exfiltration': 'Yes'},
'references': [{'date_accessed': '2026-08-12', 'source': 'Ransomware.live'},
{'date_accessed': '2026-08-12', 'source': 'ClassAction.org'}],
'regulatory_compliance': {'legal_actions': 'Potential class action lawsuit'},
'threat_actor': 'Interlock',
'title': 'Cyberattack on AngMar Management Services Exposes 710GB of '
'Sensitive Data',
'type': 'Data Breach'}