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Sheppard, Mullin, Richter & Hampton

sheppardmullinrichterhampto.com

CONFIRMED

State of California Department of Justice data breach disclosure notice filed by Sheppard, Mullin, Richter & Hampton.

Observable Status CONFIRMED

Industry / Sector Professional Services

Incident Classification Network Intrusion & Data Exfiltration

Attributed Threat Actor SilentRansomGroup

Affected Population Scope Under Audit

First Seen 2026-10-02

Last Updated 2026-10-05

Statutory Regulatory Filings:

California Department of Justice: SB-24 Data Breach Notice

OPEN WEIGHTS TELEMETRY • DETERMINISTIC CONFIDENCE

Confidence & Source Corroboration

92% CONFIDENCE

1. Primary Authority CONFIRMED BY REGULATOR Base weight: 65%

2. Evidence Specificity +15% Statutory Filing Verified

3. Corroboration Curve +12% 2 independent domains

4. Timeline & Staleness +0% 2 milestones logged

Corroborated Source Domains:

oag.ca.gov ransomware.live

STATUTORY REGULATORY DISCLOSURES

Official Regulatory Filings & Legal Compliance Records

1 Verified Statutory Filing

Regulatory Ground Truth Standard: The disclosures below represent formal statutory filings and enforcement records submitted to government regulatory authorities (SEC, State Attorneys General, HHS OCR, CISA). In accordance with repository principles, this data is captured exactly as filed by the reporting entity and is never modified, overridden, or synthesized by AI models.

California Department of Justice

SB-24 Data Breach Notice

CONFIRMED BY REGULATOR

Docket / Accession ID Statutory Public Notice

Statutory Filing Date 2026-10-02

Disclosed Impact Scope Under Audit

Evidence Standard Regulatory Ground Truth

Statutory Filing Details & Summary (Preserved As Filed):

Official statutory regulatory filing submitted by Sheppard, Mullin, Richter & Hampton to California Department of Justice pursuant to applicable data breach disclosure mandates.

View Official Regulatory Filing Document https://oag.ca.gov/ecrime/databreach/reports/sb24-630779

Technical Forensic Briefing

Incident Overview

State of California Department of Justice data breach disclosure notice filed by Sheppard, Mullin, Richter & Hampton.

This security event involves Sheppard, Mullin, Richter & Hampton (sheppardmullinrichterhampto.com), categorized under Professional Services. Observable incident classification indicates Network Intrusion & Data Exfiltration.

Compromised Assets & Data Scope

Compromised data scope remains under technical forensic audit. Quantified victim population has not yet been formally disclosed in public filings.

Threat Actor Attribution: Activity corroborated with tactics associated with SilentRansomGroup.

Statutory Disclosures & Compliance

Formal statutory disclosures on record include California Department of Justice (SB-24 Data Breach Notice).

Milestone Timeline (2 events logged)

2026-10-02 17:00 UTC

CONFIRMED BY REGULATOR

California Attorney General Data Breach Notice (SB-24)

Source: California Attorney General Data Breach Notice (SB-24)

2026-10-05 19:25 UTC

UNVERIFIED CLAIM

Sheppard, Mullin, Richter & Hampton Listed on SilentRansomGroup Ransomware Extortion Portal

Source: SilentRansomGroup Ransomware Leak Site Claim

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