HackingTechnologyInformationStolen CredentialsData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

Doyon, Limited

bd_1d99d73a1c074876 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 2, 2024

Filed

Jun 12, 2025

To disclose

15 months

Affected

154state residents only

Linked

11 filings

Confidence

63%

Full breach record for Doyon, Limited →

Doyon, Limited notified affected individuals of a security incident where unauthorized actors accessed IT systems on or about April 1, 2024. Personal information, including government IDs and PII, was acquired. Doyon engaged forensic experts, notified law enforcement, and provided 24 months of Kroll identity monitoring. The incident is contained.

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Incident timeline

undetected · 1 days

discovery → filing · 15 months / 436 days

Apr 1, 2024

Begins

Apr 2, 2024

Discovered

Jun 12, 2025

Filed

vs. sector median

+44 wks slower

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siteblack_bastabd_809d4dffcaccd96e2024-04-02 · +436dCandidate
Leak Siteblack_bastabd_58c2397f0f6e1a5a2024-04-01 · +437dVerified

Regulatory filings (8) · sorted by filing gap

Nebraska State AGbd_611b8c6ac959d9752025-06-12Verified
Texas State AGbd_681cd3cf515d55552025-06-12Verified
Indiana State AGbd_8bc3101c371cfc202025-06-12Verified
Maine State AGbd_a24319d0a1461cbe2025-06-12Verified

Show 4 more filings ↓up to 7d gap

California State AGbd_a8719b206ae4468a2025-06-12Verified
Washington State AGbd_d478f740aa2a2bd52025-06-12Verified
New Hampshire State AGbd_fbdd4f9c42edebab2025-06-12Verified
Vermont State AGbd_e4537929d4e671812025-06-19 · +7dVerified

Name: Doyon, Limited
norm: doyon
Domain: doyondrilling.com

Name: Doyon, Limited
norm: doyon
Domain: doyondrilling.com
Industry: Technologyllm

Discovered: Apr 2, 2024
Breach occurred: Apr 1, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 154state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified law enforcement
Initial access: valid_credentials

During the incident: Initiated an investigation
Retained an outside incident response company
Notified law enforcement
Conducted a review with the assistance of external experts
Enhanced network security
Implemented additional security measures
Took steps to block the unauthorized actor(s) access to Doyon networks
Issuing notifications to potentially affected individuals
Reviewing and enhancing information security policies and procedures
Implemented new security controls
Secured the services of Kroll to provide identity monitoring
Changes made: Enhanced network security
Implemented additional security measures
Reviewing and enhancing information security policies and procedures
Implemented new security controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 months(436 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Nebraska State AGJun 12 · first

Texas State AGJun 12 · first

Indiana State AGJun 12 · first

Maine State AGJun 12 · first

California State AGJun 12 · first

Washington State AGJun 12 · first

New Hampshire State AGJun 12 · first

Montana State AGJun 12 · first · this page

Vermont State AG+7d

Pattern: first filing Jun 12 (NE), last Jun 19 (VT) — a 7-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://dojmt.gov/wp-content/uploads/2025/08/Consumer-notification-letter-45.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 12, 2025
Raw hash: f769044bb4751f5da59db1740ec7e24331855ea08db6b5d77d4250e352a16c1d

Linked disclosures

Ransomware claims (2)

Regulatory filings (8) · sorted by filing gap

Reporting entityDoyon, Limited

Victim entityDoyon, Limited

Incidentdiscovered Apr 2, 2024

Stated responseInitiated an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov