HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Siden & Associates, P.C.

bd_bc03eec1a3cfa3cf · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Oct 9, 2023

To disclose

—

Affected

28state residents only

Linked

4 filings

Confidence

65%

Full breach record for Siden & Associates, P.C. →

Siden & Associates, P.C. notified the NH Attorney General of a data security incident occurring July 17-25, 2023, affecting 28 NH residents. Unauthorized parties accessed personal information including names and Social Security numbers. Siden reported to federal law enforcement, engaged third-party experts, reset passwords, rebuilt systems, and installed EDR. Affected individuals received credit monitoring via Experian.

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Leak gap clock⏱ Leak >30d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline

Jul 17, 2023

Begins

Oct 9, 2023

Filed

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

A leak claim by monti about this victim predates this filing by 79 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitemontibd_94b04e311b8437802023-07-22 · +79dCandidate

Regulatory filings (2) · sorted by filing gap

Maine State AGbd_4147ab290a1cf7472023-10-11 · +2dVerified
Massachusetts State AGbd_fad12aa13a127f6e2023-10-06 · +3dVerified by operator

Name: Hinckley, Allen & Snyder LLP
norm: hinckley allen snyder

Name: Siden & Associates, P.C.
norm: siden associates
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Jul 17, 2023 – Jul 25, 2023
Materiality determined: —
Notification sent: Oct 6, 2023
Affected individuals: 28state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: reported this incident to federal law enforcement
Initial access: exploit_public_facing

During the incident: Moved quickly to investigate, secure its network, and identify any potentially affected individuals
Reported this incident to federal law enforcement
Launched an investigation with the assistance of third-party cybersecurity experts
Disabled the affected accounts
Rebuilt the affected systems
Reset all domain and email passwords across our entire network
Installed a world-class endpoint detection and response system
Enhanced our firewalls and hardened our network environment
Terminated our information technology services provider and retained the services of a new managed services provider
Changes made: Installed a world-class endpoint detection and response system
Enhanced our firewalls and hardened our network environment
Terminated our information technology services provider and retained the services of a new managed services provider
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >30d
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGOct 6 · first

New Hampshire State AG+3d · this page

Maine State AG+5d

Pattern: first filing Oct 6 (MA), last Oct 11 (ME) — a 5-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/siden-associates-20231009.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 9, 2023
Raw hash: fa8ea6d16e59ce005662318b8d8dba9a44f9c34577d9ed305b8c07a10b8c9ee7

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityHinckley, Allen & Snyder LLP

Victim entitySiden & Associates, P.C.

IncidentUnauthorized Access

Stated responseMoved quickly to investigate, secure its network, and identify any potentially affected individuals

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov