HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedIdentity (basic)LowContained

Brown & Streza, LLP

bd_4007dc1bfdd33730 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 5, 2023

Filed

Dec 22, 2023

To disclose

15 weeks

Affected

Not disclosed

Linked

9 filings

Confidence

65%

Full breach record for Brown & Streza, LLP →

Brown & Streza LLP notified the California Attorney General of a data security incident. On September 5, 2023, the firm learned of network disruption and discovered an unknown actor had gained unauthorized access. A forensic investigation concluded that certain files containing personal information (name and potentially other data) may have been acquired. The firm engaged a cybersecurity firm, reported to law enforcement, and implemented additional security measures. Affected individuals were offered complimentary identity protection services through Experian IdentityWorks.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d15 weeks discovery → filing

Incident timeline

discovery → filing · 15 weeks / 108 days

Sep 5, 2023

Begins

Sep 5, 2023

Discovered

Dec 22, 2023

Filed

vs. sector median

2 wks faster

This filing is one of 9 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitelosttrustbd_f929cda0efe9b7eb2023-09-26 · +87dVerified by operator

Regulatory filings (7) · sorted by filing gap

Massachusetts State AGbd_006b1d203b6c9d072023-12-22Verified
Montana State AGbd_807d8fea0e6122fd2023-12-22Candidate
Vermont State AGbd_0663a08426d271252023-05-12 · +224dVerified by operator
Massachusetts State AGbd_57809da712dfd9f22023-05-12 · +224dVerified by operator

Show 3 more filings ↓up to 224d gap

Indiana State AGbd_80bcc587bca48cf82023-05-12 · +224dVerified by operator
Montana State AGbd_9cf9bf5bf5fe645c2023-05-12 · +224dVerified by operator
California State AGbd_a3fdea8d506e32402023-05-12 · +224dVerified by operator

Name: Brown & Streza, LLP
norm: brown streza
Domain: brownandstreza.com

Name: Brown & Streza, LLP
norm: brown streza
Domain: brownandstreza.com
Industry: Professional Servicesllm

Discovered: Sep 5, 2023
Breach occurred: Sep 5, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 22, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Reported this incident to law enforcement

During the incident: Took immediate steps to ensure our network was secure
Enlisted a leading cybersecurity firm to conduct a forensic investigation
Reported this incident to law enforcement
Implemented additional security measures to help reduce the risk of a similar incident occurring in the future
Offering complimentary identity protection services through Experian IdentityWorks
Changes made: Implemented additional security measures to help reduce the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(108 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 5 states

View merged incident ↗

Vermont State AGMay 12 · first

Massachusetts State AGMay 12 · first

Indiana State AGMay 12 · first

Montana State AGMay 12 · first

California State AGMay 12 · first

Massachusetts State AG+224d

Montana State AG+224d

California State AG+224d · this page

Pattern: first filing May 12 (VT), last Dec 22 (CA) — a 224-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-578394
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 22, 2023
Raw hash: 60f878221a1122571dfe1f94451e03220b44f13ecba728949b390234d79652ed

Linked disclosures

Ransomware claims (1)

Regulatory filings (7) · sorted by filing gap

Reporting entityBrown & Streza, LLP

Victim entityBrown & Streza, LLP

Incidentdiscovered Sep 5, 2023

Stated responseTook immediate steps to ensure our network was secure

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov