Social EngineeringOtherPhishingStolen CredentialsCustomer Data InvolvedTargetedPIIIdentity (basic)LowContained

Prairie Ridge Maintenance Co.

bd_88b3ec29246748a0 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 6, 2023

Filed

Dec 13, 2023

To disclose

23 weeks

Affected

1state residents only

Confidence

64%

Full breach record for Prairie Ridge Maintenance Co. →

Prairie Ridge Maintenance Co. notified Montana residents of a security incident discovered on July 6, 2023. An unauthorized actor accessed an employee email account between June and July 2023, potentially exposing customer names. The company secured the account, investigated, and offered 12 months of credit monitoring.

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Incident timeline

undetected · 35 days

discovery → filing · 23 weeks / 160 days

Jun 1, 2023

Begins

Jul 6, 2023

Discovered

Dec 13, 2023

Filed

vs. sector median

+15 wks slower

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

Name: Prairie Ridge Maintenance Co.
norm: prairie ridge maintenance

Name: Prairie Ridge Maintenance Co.
norm: prairie ridge maintenance
Industry: Otherllm

Discovered: Jul 6, 2023
Breach occurred: Jun 1, 2023 – Jul 7, 2023
Undetected for: 35 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 13, 2023
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: notifying state regulators, as required
Initial access: phishing_link

During the incident: Immediately took steps to secure the email account
Launched an investigation to determine the nature and scope of the incident
Offering you complimentary access to 12 months of credit monitoring and identity theft restoration services through IDX
Changes made: Working to implement additional security measures to further protect against similar incidents in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 23 weeks(160 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/OCP/Consumer-notification-letter-944.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 13, 2023
Raw hash: cd8b3c8edc7a2a0273d23e460485caf34f72881592e25fa06bf936beba3afe4f

Reporting entityPrairie Ridge Maintenance Co.

Victim entityPrairie Ridge Maintenance Co.

Incidentdiscovered Jul 6, 2023

Stated responseImmediately took steps to secure the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov