HackingHealthcareHealthcareStolen CredentialsEmployee Data InvolvedCustomer Data InvolvedDelayed DiscoveryPHIIdentity (basic)EmploymentLowContained

Onsite Mammography

bd_c686ace3fe4924d6 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 4, 2024

Filed

Apr 21, 2025

To disclose

28 weeks

Affected

39state residents only

Linked

8 filings

Confidence

66%

Full breach record for Onsite Mammography →2 incidents on file

Onsite Mammography, LLC notified the NH Attorney General that an unauthorized actor accessed an employee's email account on October 4, 2024. The incident was discovered on the same day. A subsequent investigation determined that personal information and protected health information (PHI) of approximately 39 New Hampshire residents may have been accessed. The company engaged cybersecurity experts, reset passwords, and offered credit monitoring services.

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Incident timeline

discovery → filing · 28 weeks / 199 days

Oct 4, 2024

Begins

Oct 4, 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
Maine State AGbd_c85f887b9fa8986b2025-04-21Verified
South Carolina State AGbd_e2d742e7000ab8362025-04-22 · +1dVerified

Name: Onsite Mammography
norm: onsite mammography

Name: Onsite Mammography
norm: onsite mammography
Industry: Healthcarellm

Discovered: Oct 4, 2024
Breach occurred: Oct 4, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 21, 2025
Affected individuals: 39state-resident count only
Data types: PHIIdentity (basic)Employment
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Took steps to address the issue and secure its email environment
Engaged a team of cybersecurity experts
Implemented a forced password reset
Notified law enforcement
Launched a comprehensive investigation
Engaged the services of an outside data analytics vendor
Implemented additional security features to reduce the risk of a similar incident occurring in the future
Offering complimentary Equifax Credit Watch Gold credit monitoring and identity protection services through Epiq
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: 28 weeks(199 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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

Maine State AGApr 21 · first

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/onsite-mammography-20250421.pdf
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: 92e1e0dc5d523260de930a344c66d74e7a6073026cae66fe13677439a9db4545

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityOnsite Mammography

Victim entityOnsite Mammography

Incidentdiscovered Oct 4, 2024

Stated responseTook steps to address the issue and secure its email environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov