HackingOtherTargetedIdentity (basic)Government IDMediumContained

The Sleepy Hollow Country Club

bd_5c9d6861cfe3db53 · schema v1 · pii pii-v2

Severity

Medium

Discovered

May 1, 2025

Filed

Sep 5, 2025

To disclose

—

Affected

1state residents only

Linked

4 filings

Confidence

66%

Full breach record for The Sleepy Hollow Country Club →

Sleepy Hollow Country Club reported unauthorized access to its IT systems in May 2025, affecting one Nebraska resident. Personal information, including names and Social Security Numbers, may have been accessed. The club notified the FBI, engaged cybersecurity specialists, and began notifying affected individuals on September 5, 2025, offering one year of credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >90d

Incident timeline

May 1, 2025

Discovered

Sep 5, 2025

Filed

This filing is one of 4 about the same incident.View merged incident

A leak claim by akira about this victim predates this filing by 108 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteakirabd_3f19fbe2f795632f2025-05-20 · +108dVerified by operator

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_280ceb3a5c82ce622025-09-05Verified
Maine State AGbd_c18c13726082d5142025-09-05Candidate

Name: The Sleepy Hollow Country Club
norm: the sleepy hollow country club
Domain: sleepyhollowcc.org

Name: The Sleepy Hollow Country Club
norm: the sleepy hollow country club
Domain: sleepyhollowcc.org
Industry: Otherllm

Discovered: May 1, 2025
Materiality determined: —
Notification sent: Sep 5, 2025
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified U.S. federal law enforcement, including the Federal Bureau of Investigation ("FBI")
Initial access: exploit_public_facing

During the incident: Took protective actions to stop the unauthorized access
Notified U.S. federal law enforcement, including the Federal Bureau of Investigation ("FBI")
Assessed the security of our network and systems
Launched an investigation with the assistance of leading cybersecurity specialists
Installed monitoring devices on our IT systems to detect suspicious activity
Working to implement additional safeguards
Providing potentially affected individuals one (1) year of complimentary credit protection and monitoring services through Privacy Solutions
Changes made: Installed monitoring devices on our IT systems to detect suspicious activity
Working to implement additional safeguards
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >90d
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 · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGSep 5 · first

Maine State AGSep 5 · first

Nebraska State AGSep 5 · first · this page

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/66733670-b6a8-40ba-bb24-722baec393a4.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 5, 2025
Raw hash: 707c073ca673644ead9663482727b78225205bb9a3d918fac26d4d580b416ccd

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityThe Sleepy Hollow Country Club

Victim entityThe Sleepy Hollow Country Club

Incidentdiscovered May 1, 2025

Stated responseTook protective actions to stop the unauthorized access

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancenebraska.gov