MalwareOtherRansomwareCapture Stored DataData ExfiltratedData EncryptedCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)LowContained

Doyon, Limited

bd_fbdd4f9c42edebab · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 2, 2024

Filed

Jun 12, 2025

To disclose

15 months

Affected

17state residents only

Linked

11 filings

Confidence

66%

Full breach record for Doyon, Limited →

Doyon, Limited reported a security incident where an unauthorized actor installed encryption software and exfiltrated personal information of approximately 17 New Hampshire residents. The incident occurred on or about April 1, 2024, and was discovered on April 2, 2024. Doyon engaged forensic investigators, notified law enforcement, and provided 24 months of credit monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d15 months discovery → filing

Incident timeline

undetected · 1 days

discovery → filing · 15 months / 436 days

Apr 1, 2024

Begins

Apr 2, 2024

Discovered

Mar 19, 2025

Scope determined

Jun 12, 2025

Filed

vs. sector median

+54 wks slower

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

A leak claim by black_basta about this victim predates this filing by 437 days.View originating leak claim

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

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
Washington State AGbd_d478f740aa2a2bd52025-06-12Verified
Vermont State AGbd_e4537929d4e671812025-06-19 · +7dVerified

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

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

Discovered: Apr 2, 2024
Breach occurred: Apr 1, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: Mar 19, 2025
Notification sent: Jun 12, 2025
Affected individuals: 17state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified State of New Hampshire Department of Justice

During the incident: Engaged an incident response company to investigate
Contacted law enforcement
Arranged to provide affected customers with credit monitoring through Kroll at no cost to the customer for up to two years
Provided affected customers with recommendations and a guide for contacting the credit reporting agencies to initiate a fraud alert or a security freeze
Provided information about reporting to law enforcement
Changes made: Enhanced network security
Implemented additional security measures to further protect our systems
Took steps to block the unauthorized actor(s) access to Doyon networks
Reviewed and enhanced 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: Leak >180d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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

Washington State AGJun 12 · first

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/doyon-limited-alaska-native-regional-20250612.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: ed5f44d9eac25cfcae35754907d4997d3f44f5bed25d2aa58d5962e314fa008e

Linked disclosures

Ransomware claims (2)

Regulatory filings (8) · sorted by filing gap

Reporting entityDoyon, Limited

Victim entityDoyon, Limited

Incidentdiscovered Apr 2, 2024

Stated responseEngaged an incident response company to investigate

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov