HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDMediumResolved

Wisconsin Health Care Liability Insurance Plan

bd_cc33fbf4a17d811f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 5, 2018

Filed

Dec 20, 2018

To disclose

15 days

Affected

1state residents only

Confidence

65%

Supplemental notice from Wisconsin Health Care Liability Insurance Plan regarding unauthorized access to a secure file sharing system (Citrix Sharefile) by an attacker using the independent auditor's credentials. Access occurred Nov 4, 2018; discovered Dec 5, 2018. Data involved: names, addresses, SSNs, TINs. Auditor relationship terminated; credit monitoring offered.

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Incident timeline

undetected · 31 days

discovery → filing · 15 days

Nov 4, 2018

Begins

Dec 5, 2018

Discovered

Dec 20, 2018

Filed

vs. sector median

6 wks faster

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

Name: Wisconsin Health Care Liability Insurance Plan
norm: wisconsin health care liability insurance plan

Name: Wisconsin Health Care Liability Insurance Plan
norm: wisconsin health care liability insurance plan
Industry: Financial Servicesllm

Discovered: Dec 5, 2018
Breach occurred: Nov 4, 2018
Undetected for: 31 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 20, 2018
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Terminated the independent auditor's access to the secure file sharing system
Terminated relationship with the auditor firm
Fully investigated the incident
Offered twelve months of free credit monitoring services
Changes made: Reviewing information required by accountants and auditors
Reviewing all other vendor security practices and procedures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 days(15 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://dojmt.gov/wp-content/uploads/Wausau-MedMal-Management-Services-LLC-Wisconsin-Health-Care-Liability-Insurance-Plan.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 20, 2018
Raw hash: b17b3ce9f722ecc2f501fef87133bb09c8715d1bd59a51be45c1ca38ceacfab7

Reporting entityWisconsin Health Care Liability Insurance Plan

Victim entityWisconsin Health Care Liability Insurance Plan

Incidentdiscovered Dec 5, 2018

Stated responseTerminated the independent auditor's access to the secure file sharing system

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov