HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedTargetedAuthenticationEducationFinancial accountIdentity (basic)Government IDPHIPIIHealth (basic)HighContained

Doyon, Limited

bd_d478f740aa2a2bd5 · schema v1 · pii pii-v1

Severity

High

Discovered

Apr 2, 2024

Filed

Jun 12, 2025

To disclose

15 months

Affected

1,929state residents only

Linked

10 records

Confidence

70%

Full breach record for Doyon, Limited →

DOYON, LIMITED reported an unauthorized access incident in Washington affecting 1,929 residents. Access occurred April 1-4, 2024; discovered April 2, 2024. Personal information was involved. Doyon engaged forensic experts, notified law enforcement, and provided 24 months of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d15 months discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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

+43 wks slower

This filing is one of 10 records about the same incident.View merged incident

A leak claim by black_basta about this victim was first seen 421 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteblack_bastabd_58c2397f0f6e1a5a2024-04-01 · +437dVerified

Regulatory filings (8) · sorted by filing gap

Montana State AGbd_1d99d73a1c0748762025-06-12Verified
Nebraska State AGbd_611b8c6ac959d9752025-06-12Verified
Texas State AGbd_681cd3cf515d55552025-06-12Verified
Indiana State AGbd_8bc3101c371cfc202025-06-12Verified

Show 4 more filings ↓up to 7d gap

Maine State AGbd_a24319d0a1461cbe2025-06-12Verified
California State AGbd_a8719b206ae4468a2025-06-12Verified
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: Professional Servicesllm

Discovered: Apr 2, 2024
Breach occurred: Apr 1, 2024 – Apr 4, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1,929state-resident count only
Data types: PIIIdentity (basic)
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birthStudent ID numberMilitary ID numberPassport numberHealth insurance IDMedical informationUsername + password
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
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
Took steps to block the unauthorized actor(s) access to Doyon networks
Issuing notifications to potentially affected individuals
Secured the services of Kroll to provide identity monitoring at no cost to you for 24 months
Changes made: Enhanced network security
Implemented additional security measures to further protect our systems
Reviewing and enhancing our information security policies and procedures
Implemented new security controls to help avoid future incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 months(436 days from discovery to filing)
Compliance flags: WA AG >90dLeak >180d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Montana State AGJun 12 · first

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

New Hampshire State AGJun 12 · first

Washington State AGJun 12 · first · this page

Vermont State AG+7d

Pattern: first filing Jun 12 (MT), 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA33575.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: e41e31f2059397cd2f0942ffa040eecaaae3a9fed40184b0777edec6048e8173

Linked disclosures

Ransomware claims (1)

Regulatory filings (8) · sorted by filing gap

Reporting entityDoyon, Limited

Victim entityDoyon, Limited

Incidentdiscovered Apr 2, 2024

Stated responseInitiated an investigation

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com