HackingGovernmentGovernmentStolen CredentialsData ExfiltratedTargetedIdentity (basic)Government IDHealth (basic)MediumContained

Richland County, WI

bd_01368ddf0102f20b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 4, 2023

Filed

Sep 13, 2024

To disclose

49 weeks

Affected

5state residents only

Linked

6 filings

Confidence

66%

Full breach record for Richland County, WI →

Richland County, WI notified New Hampshire AG of unauthorized network access between Sept 28 and Oct 26, 2023, detected Oct 4, 2023. Impacted ~5 NH residents with PII (name, SSN) and PHI. Notification sent Sept 9, 2024, offering credit monitoring.

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Incident timeline

undetected · 6 days

discovery → filing · 49 weeks / 345 days

Sep 28, 2023

Begins

Oct 4, 2023

Discovered

Sep 13, 2024

Filed

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Montana State AGbd_2eaab31f297eaed52024-09-09 · +4dVerified
Massachusetts State AGbd_8067602f5a1a785b2024-09-09 · +4dVerified
HHS OCRbd_a4b0c656824257872024-09-09 · +4dCandidate
Vermont State AGbd_a9fb795cda8cdf7e2024-09-09 · +4dVerified

Show 1 more filing ↓up to 12d gap

Illinois State AGbd_3e03def6f62f5d4f2024-09-01 · +12dCandidate

Name: Richland County, WI
norm: richland county wi

Name: Richland County, WI
norm: richland county wi
Industry: Governmentllm

Discovered: Oct 4, 2023
Breach occurred: Sep 28, 2023 – Oct 26, 2023
Undetected for: 6 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 9, 2024
Affected individuals: 5state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notice is being provided under the Health Insurance Portability and Accountability Act Breach Notification Rule
Initial access: valid_credentials

During the incident: Secured their environment
Commenced a prompt and thorough investigation
Working very closely with external cybersecurity professionals
Extensive forensic investigation and manual document review
Changes made: Reviewed and revised our information security practices
Implemented additional security measures to mitigate the chance of a similar event in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 49 weeks(345 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Illinois State AGSep 1 · first

Montana State AG+8d

Massachusetts State AG+8d

HHS OCR+8d

Vermont State AG+8d

New Hampshire State AG+12d · this page

Pattern: first filing Sep 1 (IL), last Sep 13 (NH) — a 12-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://mm.nh.gov/files/uploads/doj/remote-docs/richland-county-wi-20240913.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 13, 2024
Raw hash: f296c0863de6c6c49494559d34bc39d157a9a343644f1f9af6ef6a1720a1f256

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityRichland County, WI

Victim entityRichland County, WI

Incidentdiscovered Oct 4, 2023

Stated responseSecured their environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov