HackingGovernmentGovernmentStolen CredentialsData ExfiltratedIdentity (basic)LowContained

Richland County, WI

bd_a9fb795cda8cdf7e · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 4, 2023

Filed

Sep 9, 2024

To disclose

49 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

66%

Full breach record for Richland County, WI →

Richland County, WI notified consumers of a data breach detected on October 4, 2023. Unauthorized access occurred between September 28 and October 26, 2023, potentially exposing full names. The county engaged forensic investigators, secured its network, and offered complimentary Experian IdentityWorks credit monitoring. No evidence of identity theft was found.

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Vermont clock✗ VT AG >45 bday49 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 6 days

discovery → filing · 49 weeks / 341 days

Sep 28, 2023

Begins

Oct 4, 2023

Discovered

Sep 9, 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_2eaab31f297eaed52024-09-09Verified
Massachusetts State AGbd_8067602f5a1a785b2024-09-09Verified
HHS OCRbd_a4b0c656824257872024-09-09Candidate
New Hampshire State AGbd_01368ddf0102f20b2024-09-13 · +4dVerified

Show 1 more filing ↓up to 8d gap

Illinois State AGbd_3e03def6f62f5d4f2024-09-01 · +8dCandidate

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: Sep 9, 2024
Notification sent: Sep 9, 2024
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Secured the environment
Commenced a prompt and thorough investigation
Working very closely with external cybersecurity professionals
Conducted an extensive forensic investigation
Conducted manual document review
Provided access to complimentary services through Experian IdentityWorks
Set up a dedicated and confidential toll-free response line
Changes made: Reviewed and revised information security practices
Implemented additional security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 49 weeks(341 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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 · this page

New Hampshire State AG+12d

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://ago.vermont.gov/document/2024-09-09-richland-county-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 9, 2024
Raw hash: 5708966ac46faf8bf17f38aa1785eed765b849419034da74dd30791a93c616b0

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityRichland County, WI

Victim entityRichland County, WI

Incidentdiscovered Oct 4, 2023

Stated responseSecured the environment

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov