HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedTargetedIdentity (basic)PIILowContained

Messner Reeves LLP

bd_dbb2ee492513b9dc · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Apr 11, 2024

To disclose

—

Affected

57state residents only

Confidence

66%

Full breach record for Messner Reeves LLP →2 incidents on file

Messner Reeves LLP notified Montana residents of a data incident where an unknown actor accessed systems between July 17 and August 5, 2023, copying files containing names and variable data. The firm notified law enforcement, secured its network, and offered credit monitoring services.

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Incident timeline

Jul 17, 2023

Begins

Apr 11, 2024

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed57 affectedView incident

Name: Messner Reeves LLP
norm: messner reeves
Domain: messner.com

Name: Messner Reeves LLP
norm: messner reeves
Domain: messner.com
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Jul 17, 2023 – Aug 5, 2023
Materiality determined: —
Notification sent: Apr 11, 2024
Affected individuals: 57state-resident count only
Data types: Identity (basic)PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: notifying federal law enforcement
Initial access: valid_credentials

During the incident: Confirming the security of our network
Reviewing the relevant files and systems
Notifying potentially affected business partners/clients
Notifying federal law enforcement
Offering 12/24 months of credit monitoring and identity protection services through IDX, A ZeroFox Company
Changes made: Continue to review our existing policies and procedures
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.

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-1277.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 11, 2024
Raw hash: 7810a80a436273c7449181afbdde9593f183f85356aca952c14e456429ce02fb

Reporting entityMessner Reeves LLP

Victim entityMessner Reeves LLP

IncidentUnauthorized Access

Stated responseConfirming the security of our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov