HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)Government IDHealth (basic)EmploymentMediumContained

Orrick, Herrington & Sutcliffe LLP

bd_0cda4366c590210b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 13, 2023

Filed

Dec 28, 2023

To disclose

41 weeks

Affected

Not disclosed

Linked

4 filings

Confidence

64%

Full breach record for Orrick, Herrington & Sutcliffe LLP →9 incidents on file

Orrick, Herrington & Sutcliffe LLP experienced a security incident where an unauthorized third party gained remote access to its network between February 28 and March 13, 2023. The attacker obtained files containing personal information, including data related to MultiPlan, Inc. clients. Orrick detected the access on March 13, 2023, blocked it, and engaged forensic experts. Identity monitoring services are being offered to affected individuals.

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Incident timeline

undetected · 13 days

discovery → filing · 41 weeks / 290 days

Feb 28, 2023

Begins

Mar 13, 2023

Discovered

Dec 28, 2023

Filed

vs. sector median

+23 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

New Hampshire State AGbd_495af8b2c9c47aa22024-01-05 · +8dVerified
Maine State AGbd_4077fe815e7521ca2024-01-24 · +27dVerified
California State AGbd_2ee611114ebad3622023-11-09 · +49dCandidate

Name: Orrick, Herrington & Sutcliffe LLP
norm: orrick herrington sutcliffe
Domain: orrick.com

Name: Orrick, Herrington & Sutcliffe LLP
norm: orrick herrington sutcliffe
Domain: orrick.com
Industry: Professional Servicesllm

Discovered: Mar 13, 2023
Breach occurred: Feb 28, 2023 – Mar 13, 2023
Undetected for: 13 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)Government IDHealth (basic)Employment
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified law enforcement
Third party: via Orrick, Herrington & Sutcliffe LLP

During the incident: Took immediate steps to block the unauthorized access
Launched an investigation with the support of leading outside cybersecurity experts
Notified law enforcement
Offering two years of complimentary identity monitoring services through Kroll
Deployed additional security measures and tools with the guidance of third-party experts to strengthen the ongoing security of its network
Established a dedicated call center to answer questions
Changes made: Deployed additional security measures and tools with the guidance of third-party experts to strengthen the ongoing security of its network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 41 weeks(290 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 3 states

View merged incident ↗

California State AGNov 9 · first

California State AG+49d · this page

New Hampshire State AG+57d

Maine State AG+76d

Pattern: first filing Nov 9 (CA), last Jan 24 (ME) — a 76-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/sb24-578559
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 28, 2023
Raw hash: 73bfcc55c3b15b1c245002bf316f546be4038f7ee0af16c70d98eed839875529

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityOrrick, Herrington & Sutcliffe LLP

Victim entityOrrick, Herrington & Sutcliffe LLP

Incidentdiscovered Mar 13, 2023

Stated responseTook immediate steps to block the unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov