HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDPHIHealth (basic)MediumContained

Brown Rudnick LLP

bd_1702117adfd7e676 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 18, 2022

Filed

Aug 26, 2022

To disclose

14 weeks

Affected

Not disclosed

Confidence

64%

Full breach record for Brown Rudnick LLP →3 incidents on file

Brown Rudnick LLP reported unauthorized access to two employee Microsoft 365 email accounts between May 17 and May 26, 2022. The firm detected unusual activity on May 18, 2022. Potentially impacted information includes names, Social Security numbers, and medical information. The firm engaged forensic specialists, secured the accounts, and offered 12 months of credit monitoring. No evidence of misuse was found.

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California clockDiscovered May 18, 2022 → Notified Aug 4, 202278d ✗ CA 60-day late14 weeks discovery → filing

Incident timeline

undetected · 1 days

discovery → filing · 14 weeks / 100 days

May 17, 2022

Begins

May 18, 2022

Discovered

Aug 26, 2022

Filed

vs. sector median

3 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Brown Rudnick LLP
norm: brown rudnick
Domain: brown.edu

Name: Brown Rudnick LLP
norm: brown rudnick
Industry: Professional Servicesllm

Discovered: May 18, 2022
Breach occurred: May 17, 2022 – May 26, 2022
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Aug 4, 2022
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDPHIHealth (basic)
Data elements: Social Security numberMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Notified applicable regulatory authorities, as required by law
Initial access: valid_credentials

During the incident: Immediately took steps to secure the e-mail account
Began working with third-party incident response and data forensic specialists to investigate the nature and scope of the incident
Reviewed the e-mail accounts to determine whether sensitive information may have been contained within the accessed e-mail accounts
Notified applicable regulatory authorities, as required by law
Offering 12 months of complimentary access to credit monitoring services through Epiq
Changes made: Review and then remediate the circumstances that led to the incident
Continue standard practice of reviewing security policies, procedures, and processes to ensure measures adhere to industry best practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(100 days from discovery to filing)
Compliance flags: CA 60-day late · 78d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: May 18, 2022
→ Notified: Aug 4, 2022
78d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: May 18, 2022 → Notified: Aug 4, 2022	78d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

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/sb24-556677
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 26, 2022
Raw hash: 57d0ff0e9459973764c378c6cc6213080b26eb2e84de559d4f4e651a024002de

Reporting entityBrown Rudnick LLP

Victim entityBrown Rudnick LLP

Incidentdiscovered May 18, 2022

Stated responseImmediately took steps to secure the e-mail account

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov