seiu1000.org Listed by lockbit3 Ransomware Group

On January 18, 2024, the ransomware group LockBit3 listed seiu1000.org on its leak site, claiming that it had exfiltrated internal files from Local 1000 of the Service Employees International Union during a ransomware attack. The union represents 96,000 public-sector workers employed by the State of California, making it the largest such union in the state. The leak-site posting does not quantify the number of individuals whose data was taken, nor does it specify which exact records were allegedly stolen beyond stating that internal files were exfiltrated.

Details in the Leak-Site Listing

The primary disclosure on the LockBit3 onion site states that SEIU Local 1000 suffered a ransomware intrusion and that attackers successfully removed data before encryption. The listing includes a partial sample of the stolen material and gives the victim a deadline to negotiate before full publication. Public reporting on LockBit3 indicates the group typically posts compressed archives or file trees as proof of compromise. The disclosure does not detail the precise data types exposed, such as whether member names, Social Security numbers, banking details, or employment records were included. It simply states that 308 GB of internal files were taken.

Why This Matters for You and Your Family

If you or anyone in your household is a current or former SEIU Local 1000 member, state employee covered by the union, or a dependent whose information appears in union records, your personal data may now sit on a criminal server. Union membership files routinely contain home addresses, dates of birth, phone numbers, email accounts, and payroll information. Once that material leaves the victim’s control, it can be sold, traded, or used to target you with identity theft, tax fraud, or phishing campaigns. Even if the exact volume of affected records remains unknown, the confirmed theft of internal files means the exposure risk is real and immediate for the tens of thousands of California workers the union represents.

The Doxxing and Identity-Chain Risks

Stolen union files rarely exist in isolation. They often link an individual’s work email to personal phone numbers, home addresses, and family relationships. Attackers and data brokers can chain these fragments with information from other breaches to build a complete profile. A seemingly harmless union membership roster can reveal where your children attend school, what gaming accounts they use, and which online handles belong to the same household. That chain turns a single breach into long-term doxxing fuel. Credential leaks of this kind frequently cascade into account takeovers on gaming platforms, social media, and email, exposing both adults and minors to harassment or further extortion.

LockBit3’s Known Track Record

Public reporting attributes the LockBit3 variant to a ransomware operation that first appeared in 2019 under the original LockBit name and rebranded after law-enforcement actions. The group has claimed responsibility for attacks on hospitals, manufacturers, financial firms, and government-adjacent organizations worldwide. Its standard playbook involves initial access through phishing, remote desktop protocol brute-force, or stolen credentials, followed by rapid exfiltration of sensitive files before deploying encryption. LockBit3 operators typically demand payment in Bitcoin and threaten to publish or sell the data if the victim refuses. They maintain a leak site that automatically escalates pressure by releasing samples on a countdown timer. While exact success rates are difficult to verify, the group’s persistent presence on multiple leak-site aggregators shows it remains one of the more active ransomware families.

What to do

• Run a DoxxScan to map every link between your work email, personal handles, phone numbers, and real identity so you can see exactly what chains back to the SEIU Local 1000 breach.
• Rotate any password used at seiu1000.org or related state-union portals anywhere else it is reused, and switch to 2FA through an authenticator app rather than SMS.
• Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next time your information appears for sale you learn within hours instead of months.
• Cover the entire household with DoxxScan family protection that extends to dependents and children’s gaming accounts, which often become targets when credential leaks create doxxing chains.
• Let DoxxScan remediation specialists handle takedown requests for any exposed personal records that surface on data-broker or extortion sites.

The SEIU Local 1000 breach is a reminder that even large, established organizations can lose control of member data with little warning. Taking concrete steps now limits how far attackers can travel down the identity chain that begins with this incident. DoxxScan’s continuous monitoring, AI-powered identity-chain mapping, hands-on remediation by specialists, and household coverage provide a practical way for you and your family to stay ahead of the next leak.