Skip to content
Cyber Threat
CTI Academy Sponsor CTI Academy
Ransomware victim Education

California School Employees Association

Listed by Ransomhouse on · organisation based in United States

www.csea.com

Disclosed
Sep 10, 2026
Leak-site listing date
Threat group
Ransomhouse
159 victims listed
Country
United States
#1 most targeted
Sector
Education

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Ransomhouse. Figures and technique mappings are quoted from the source data, not inferred.

Ransomhouse dark web leak site listed California School Employees Association on 10 September 2026, offering its members protected by CSEA for financial services and legal support.

About California School Employees Association

The California School Employees Association (CSEA) is dedicated to supporting classified school employees and advocating for public education. They offer a range of member benefits including financial services, legal help, and educational resources. CSEA aims to protect the rights of its members while promoting quality education for students. Their intended clients include school employees, retirees, and individuals interested in joining their advocacy efforts.

Source record: ransomware.live

About the Ransomhouse group

RansomHouse is a double-extortion RaaS operation active since late 2021, attributed to the threat actor "Jolly Scorpius," targeting over 120 organizations across healthcare, finance, transportation, and government, recently upgrading to a multi-layered dual-key encryption architecture. Ransomhouse has listed 212 victims since June 2021.

Incident analysis

California School Employees Association was listed by Ransomhouse ransomware, a group with 159 victims recorded in this database. The listing appeared on the group's leak site on September 10, 2026.

California School Employees Association is based in United States and operates in the Education sector. United States ranks #1 worldwide for ransomware disclosures, with 10,276 victims in this database.

Sector context. Educational institutions often have under-resourced IT security teams and hold large amounts of student and faculty personal data, making them attractive targets for ransomware groups.

Ransomhouse typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was California School Employees Association attacked by ransomware?

Yes. California School Employees Association was listed as a victim of the Ransomhouse ransomware group on September 10, 2026. The organisation is based in United States and operates in the Education sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked California School Employees Association?

California School Employees Association was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 159 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the California School Employees Association ransomware attack occur?

The ransomware attack on California School Employees Association was disclosed on September 10, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the California School Employees Association ransomware attack?

The specific data stolen from California School Employees Association has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Education organisation, California School Employees Association likely held student and faculty personal data and academic records.

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.