HackingProfessional ServicesProfessional ServicesStolen CredentialsTargetedPIIIdentity (basic)LowContained

American Meteorological Society, Inc.

bd_b970b0b0dbd5b2a9 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 5, 2023

Filed

Dec 14, 2023

To disclose

9 days

Affected

2state residents only

Linked

6 filings

Confidence

65%

Full breach record for American Meteorological Society, Inc. →

American Meteorological Society notified Montana residents of a cyber incident discovered on December 5, 2023, involving unauthorized access to its systems in April 2023. The incident may have exposed names and other personal information. AMS engaged law enforcement, secured its network, and offered credit monitoring services.

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Incident timeline

undetected · 248 days

discovery → filing · 9 days

Apr 1, 2023

Begins

Dec 5, 2023

Discovered

Dec 14, 2023

Filed

vs. sector median

16 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecactusbd_568a5325102af8f42023-07-20 · +147dVerified by operator

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_08ff271fb8d0245f2023-12-14Verified by operator
Vermont State AGbd_37660df843cc34e32023-12-14Verified
New Hampshire State AGbd_4fa7bfef28659bc62023-12-14Candidate
Maine State AGbd_e6c548a44be5df272023-12-15 · +1dVerified

Name: American Meteorological Society, Inc.
norm: american meteorological society

Name: American Meteorological Society, Inc.
norm: american meteorological society
Industry: Professional Servicesllm

Discovered: Dec 5, 2023
Breach occurred: Apr 1, 2023
Undetected for: 248 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 14, 2023
Affected individuals: 2state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified federal law enforcement
Initial access: valid_credentials

During the incident: Took steps to secure our network environment
Launched an investigation
Searched that data to determine whose information might have been involved
Implemented additional security features
Notified federal law enforcement
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: 9 days(9 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Massachusetts State AGDec 14 · first

Vermont State AGDec 14 · first

New Hampshire State AGDec 14 · first

Montana State AGDec 14 · first · this page

Maine 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-949.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 14, 2023
Raw hash: b75964aae84cd9ee9a5e30a8a181f024b25fa80f8075ec41bd09431819d38bd0

Linked disclosures

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Reporting entityAmerican Meteorological Society, Inc.

Victim entityAmerican Meteorological Society, Inc.

Incidentdiscovered Dec 5, 2023

Stated responseTook steps to secure our network environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov