Social EngineeringHealthcareHealthcarePhishingData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDHealth (basic)PHIMediumContained

Onsite Mammography

bd_b920c3058b4d0c0e · schema v1 · pii pii-v2

Severity

Medium

Discovered

Oct 4, 2024

Filed

Apr 21, 2025

To disclose

—

Affected

36state residents only

Linked

8 filings

Confidence

66%

Full breach record for Onsite Mammography →2 incidents on file

Onsite Mammography, LLC notified the Nebraska Attorney General of a security incident discovered on October 4, 2024, involving unauthorized access to an employee's email account. The incident affected approximately 36 Nebraska residents, exposing names, dates of birth, Social Security numbers, and protected health information (PHI). Onsite engaged cybersecurity experts and law enforcement, reset passwords, and provided 12-24 months of credit monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

Oct 4, 2024

Begins

Oct 4, 2024

Discovered

Apr 21, 2025

Filed

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

New Hampshire State AGbd_c686ace3fe4924d62025-04-21Verified
Maine State AGbd_c85f887b9fa8986b2025-04-21Verified
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 4, 2024
Breach occurred: Oct 4, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 21, 2025
Affected individuals: 36state-resident count only
Data types: Identity (basic)Government IDHealth (basic)PHI
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Notified Nebraska Attorney General
Initial access: phishing_link

During the incident: Engaging a team of cybersecurity experts
Implementing a forced password reset
Notifying law enforcement
Launching a comprehensive investigation
Enlisted independent cybersecurity experts to conduct an investigation
Engaged the services of an outside data analytics vendor
Changes made: Implemented additional security features to reduce the risk of a similar incident occurring in the future
Working to implement additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

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

New Hampshire State AGApr 21 · first

Maine State AGApr 21 · first

Nebraska 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://nebraska.gov/ago/data-breach/documents/4de33c71-58c5-409b-9270-6838ee514d6b.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: fbe238996113f97d842f2a903b08f7a154acf9edbeafb2b0cfa414620de05e29

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityOnsite Mammography

Incidentdiscovered Oct 4, 2024

Stated responseEngaging a team of cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov