MalwareTechnologyFinancial ServicesInformationPhishingRansomwareStolen CredentialsData ExfiltratedData EncryptedTargetedPIIIdentity (basic)LowContained

Insight Partners

bd_9d7c277529584d2a · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 16, 2025

Filed

Sep 16, 2025

To disclose

35 weeks

Affected

20state residents only

Linked

5 filings

Confidence

66%

Full breach record for Insight Partners →

Insight Partners notified Montana residents of a data breach where a threat actor used social engineering to access HR and finance systems. The actor exfiltrated personal data and encrypted servers. Insight Partners engaged investigators, contained the incident, and offered credit monitoring.

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Incident timeline

undetected · 83 days

discovery → filing · 35 weeks / 243 days

Oct 25, 2024

Begins

Jan 16, 2025

Discovered

Sep 16, 2025

Filed

vs. sector median

+16 wks slower

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Maine State AGbd_df923439e078e2f62025-09-16Candidate
California State AGbd_64d25387317d38252025-09-15 · +1dVerified
Massachusetts State AGbd_ed83b9a5a169ec552025-09-15 · +1dVerified
Texas State AGbd_b3e25a6576fabdc12025-09-18 · +2dVerified

Name: Insight Partners
norm: insight partners
Domain: insightpartners.com

Name: Insight Partners
norm: insight partners
Domain: insightpartners.com
Industry: TechnologyllmFinancial Servicesllm

Discovered: Jan 16, 2025
Breach occurred: Oct 25, 2024
Undetected for: 83 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 20state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1041 Exfiltration Over C2 ChannelT1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Notified regulatory authorities in relevant jurisdictions
Initial access: phishing_link

During the incident: Engaged third party investigators and cybersecurity experts
Expelled the threat actor from systems
Notified law enforcement and regulatory authorities
Offered complimentary identity theft protection services
Changes made: Addressed the misconfiguration that allowed the threat actor to gain access
Rebuilt compromised machines and all affected servers
Strengthened internal security and system access requirements
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 35 weeks(243 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 ↗

California State AGSep 15 · first

Massachusetts State AGSep 15 · first

Maine State AG+1d

Montana State AG+1d · this page

Texas State AG+3d

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/2025/09/Consumer-notification-letter-42.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 16, 2025
Raw hash: 474d72442f2b2f7b09abf64d02a5861c738f57e3119716dd9e8c8ec8b9c83520

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityInsight Partners

Victim entityInsight Partners

Incidentdiscovered Jan 16, 2025

Stated responseEngaged third party investigators and cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov