Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedTargetedPIIPHIHealth (basic)Identity (basic)HighContained

Onsite Mammography

bd_c85f887b9fa8986b · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 2, 2024

Filed

Apr 21, 2025

To disclose

29 weeks

Affected · nationwide

357,26532 in this filing

Linked

8 filings

Confidence

66%

Full breach record for Onsite Mammography →2 incidents on file

Onsite Mammography, LLC reported a data breach affecting 357,265 individuals, including 32 Maine residents. An unauthorized actor accessed an employee's email account in October 2024 via phishing, exposing patient names and health-related information. The company engaged forensic experts, implemented security enhancements, and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Oct 2, 2024 → Filed with AG Apr 21, 2025201d ✗ ME AG >90d29 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 29 weeks / 201 days

Oct 2, 2024

Begins

Oct 2, 2024

Discovered

Apr 21, 2025

Filed

vs. sector median

+16 wks slower

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Massachusetts State AGbd_3d572dffa9d09a382025-04-21Verified
Vermont State AGbd_a9465367175950882025-04-21Verified
HHS OCRbd_a96b83cee14ef51f2025-04-21Verified
Indiana State AGbd_b49795f765e873bc2025-04-21Verified

Show 3 more filings ↓up to 1d gap

Nebraska State AGbd_b920c3058b4d0c0e2025-04-21Verified
New Hampshire State AGbd_c686ace3fe4924d62025-04-21Verified
South Carolina State AGbd_e2d742e7000ab8362025-04-22 · +1dVerified

Name: Constangy, Brooks, Smith & Prophete, LLP
norm: constangy brooks smith prophete

Name: Onsite Mammography
norm: onsite mammography
Industry: Healthcarellm

Discovered: Oct 2, 2024
Breach occurred: Oct 2, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 21, 2025
Affected individuals: 357,265state + nationwide
Data types: PIIPHIHealth (basic)Identity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Filed notice with Maine Attorney General
Initial access: phishing_link

During the incident: Enlisted independent cybersecurity experts to conduct an investigation
Engaged the services of an outside data analytics vendor
Implemented additional security features
Offered 12 months of complimentary Equifax Credit Watch Gold credit monitoring and identity protection services
Changes made: Implemented additional security features to reduce the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 weeks(201 days from discovery to filing)
Compliance flags: ME AG >90d · 201dME resident >60d · 201d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 2, 2024
→ Filed with AG: Apr 21, 2025
201d 90 days ME AG >90d
Maine
Discovered: Oct 2, 2024
→ Notified: Apr 21, 2025
201d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 2, 2024 → Filed with AG: Apr 21, 2025	201d	90 days	ME AG >90d
Maine	Discovered: Oct 2, 2024 → Notified: Apr 21, 2025	201d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 7 states

View merged incident ↗

Massachusetts State AGApr 21 · first

Vermont State AGApr 21 · first

HHS OCRApr 21 · first

Indiana State AGApr 21 · first

Nebraska State AGApr 21 · first

New Hampshire State AGApr 21 · first

Maine State AGApr 21 · first · this page

South Carolina State AG+1d

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/cfcef04c-bcbf-4dc0-8d5d-da411e5904be.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 21, 2025
Raw hash: 47f8b6c32fd9d467b5c529f30eaaf0cbbda968537cbea8bd1e547cad425167c6

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityOnsite Mammography

Incidentdiscovered Oct 2, 2024

Stated responseEnlisted independent cybersecurity experts to conduct an investigation

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov