MalwareHealthcareHealthcareRansomwareData MishandlingSupply Chain (3P Vendor)Data ExfiltratedData EncryptedIdentity (basic)Health (basic)LowContained

Mount Sinai South Nassau

bd_829d499818097303 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 16, 2020

Filed

Sep 23, 2020

To disclose

10 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Mount Sinai South Nassau →

Mount Sinai South Nassau notified the NH AG of a third-party data event involving vendor Blackbaud. Blackbaud suffered a ransomware incident in May 2020, resulting in data exfiltration. South Nassau determined that one NH resident's name and medical information may have been accessible. Notification was sent on September 18, 2020.

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Incident timeline

undetected · 76 days

discovery → filing · 10 weeks / 69 days

May 1, 2020

Begins

Jul 16, 2020

Discovered

Sep 23, 2020

Filed

vs. sector median

1 wks faster

Part of BLACKBAUD, INC. supply-chain incident (2020) — a supply-chain cascade affecting multiple organizations.View cascade →

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Mount Sinai South Nassau
norm: mount sinai south nassau
Industry: Healthcarellm

Discovered: Jul 16, 2020
Breach occurred: May 1, 2020 – May 20, 2020
Undetected for: 76 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 18, 2020
Affected individuals: 1state-resident count only
Data types: Identity (basic)Health (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified Office of the New Hampshire Attorney General
Initial access: supply_chain

During the incident: Commenced an investigation to determine what, if any, sensitive South Nassau data was potentially involved
Provided written notice of this incident to potentially affected individuals
Placed notice of this incident on its website
Providing affected individuals with guidance on how to better protect themselves against identity theft and fraud
Providing notice of this event to other regulators as may be required under applicable state law
Changes made: Reviewing existing policies and procedures regarding third-party vendors
Working with Blackbaud to evaluate additional measures and safeguards to protect against this type of incident in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(69 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://mm.nh.gov/files/uploads/doj/remote-docs/mount-sinai-south-nassau-20200923.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 23, 2020
Raw hash: d5d99884f8471cddae0c65e76d92204967c26f9129983c36e8571966d1250634

Reporting entityMullen Coughlin LLC

Victim entityMount Sinai South Nassau

Incidentdiscovered Jul 16, 2020

Stated responseCommenced an investigation to determine what, if any, sensitive South Nassau data was potentially involved

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov