HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDFinancialMediumContained

Squar Milner LLP

bd_50f0fe9db67c7d28 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 25, 2020

Filed

Apr 17, 2020

To disclose

23 days

Affected

Not disclosed

Linked

3 filings

Confidence

64%

Full breach record for Squar Milner LLP →

Squar Milner LLP experienced a data breach where credentials required to access a client tax return system were compromised. The incident was discovered on March 25, 2020, with the breach date listed as February 5, 2020. Affected data included names, addresses, Social Security numbers, Tax ID numbers, and prior IRS/state tax filing information. The firm secured the system, notified the FBI, CFTB, and IRS, and offered 12 months of credit monitoring and identity theft restoration services to affected individuals.

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California clockDiscovered Mar 25, 2020 → Notified Apr 17, 202023d ✓ CA 60-day OK23 days discovery → filing

Incident timeline

undetected · 49 days

discovery → filing · 23 days

Feb 5, 2020

Begins

Mar 25, 2020

Discovered

Apr 17, 2020

Filed

vs. sector median

14 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Montana State AGbd_89da37e43d823fe12020-04-17Candidate
Massachusetts State AGbd_e764d7cdd35ffce42020-04-17Verified

Name: Squar Milner LLP
norm: squar milner

Name: Squar Milner LLP
norm: squar milner
Industry: Professional Servicesllm

Discovered: Mar 25, 2020
Breach occurred: Feb 5, 2020
Undetected for: 49 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 17, 2020
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the Federal Bureau of InvestigationNotified the California Franchise Tax BoardNotified the Internal Revenue Service
Initial access: valid_credentials

During the incident: Immediately began an investigation
Took steps to secure the system and the information stored therein
Notified the Federal Bureau of Investigation
Notified the California Franchise Tax Board
Notified the Internal Revenue Service
Offering credit monitoring and identity theft restoration services at no cost through ID Experts
Changes made: Enhancing the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 23 days(23 days from discovery to filing)
Compliance flags: CA 60-day OK · 23d
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: Mar 25, 2020
→ Notified: Apr 17, 2020
23d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Mar 25, 2020 → Notified: Apr 17, 2020	23d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Montana State AGApr 17 · first

Massachusetts State AGApr 17 · first

California State AGApr 17 · first · this page

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/sb24-189263
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 17, 2020
Raw hash: 416cd8cb75ccb928bb86a2a878f20fd96f21647b5bf7c67560e95fb24b39a8d7

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entitySquar Milner LLP

Victim entitySquar Milner LLP

Incidentdiscovered Mar 25, 2020

Stated responseImmediately began an investigation

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov