HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedTargetedIdentity (basic)Government IDPIIMediumContained

Aon

bd_f3bea3092e6d8ecc · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 25, 2022

Filed

Jun 13, 2022

To disclose

15 weeks

Affected

250state residents only

Linked

14 filings

Confidence

64%

Full breach record for Aon →11 incidents on file

Aon PLC disclosed a cyber incident where an unauthorized third party accessed systems between Dec 29, 2020, and Feb 26, 2022. Personal information including names and SSNs was obtained. Aon engaged forensic firms and notified the FBI. Affected individuals were offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 423 days

discovery → filing · 15 weeks / 108 days

Dec 29, 2020

Begins

Feb 25, 2022

Discovered

Jun 13, 2022

Filed

vs. sector median

2 wks faster

This filing is one of 14 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitedispossessorbd_d4e9fb69d737f7a62022-07-03 · +20dVerified by operator

Regulatory filings (9) · sorted by filing gap

New Hampshire State AGbd_5ba6400246ccb57f2022-06-13Verified by operator
Maine State AGbd_ee7cfc9886fcd7132022-06-24 · +11dCandidate
New Hampshire State AGbd_bed97e68b6fb0b6c2022-05-31 · +13dVerified by operator
Indiana State AGbd_fde32f8598ecaa8b2022-05-27 · +17dVerified

Show 5 more filings ↓up to 18d gap

Maine State AGbd_83344b1fed7fdb7a2022-07-01 · +18dCandidate
HHS OCRbd_1659c519cbbc91942022-05-26 · +18dVerified by operator
Oregon State AGbd_a34b45e6fa897e082022-05-26 · +18dVerified
California State AGbd_a3a4b3bd3ddac8fc2022-05-26 · +18dVerified
Maine State AGbd_bdef13158191852d2022-05-26 · +18dCandidate

Showing first 10 of 13 linked disclosures.

Name: Aon
norm: aon
Domain: aon.com

Name: Aon
norm: aon
Domain: aon.com
Industry: Professional Servicesllm

Discovered: Feb 25, 2022
Breach occurred: Dec 29, 2020 – Feb 26, 2022
Undetected for: 423 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 13, 2022
Affected individuals: 250state-resident count only
Data types: Identity (basic)Government IDPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: reported the incident to law enforcement authorities, including the FBI
Initial access: valid_credentials

During the incident: Retained leading cybersecurity firms to assist in responding and help conduct a thorough investigation
Reported the incident to, and is working closely with, law enforcement authorities, including the FBI
Offering complimentary access to Experian IdentityWorks for 24 months
Changes made: Implemented numerous measures designed to enhance the security of our network, systems, and data
Continue to evaluate additional steps that may be taken to further enhance the firm’s security environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(108 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 7 states

View merged incident ↗

HHS OCRMay 26 · first

Oregon State AGMay 26 · first

California State AGMay 26 · first

Maine State AGMay 26 · first

Indiana State AG+1d

New Hampshire State AG+5d

New Hampshire State AG+18d

Montana State AG+18d · this page

Maine State AG+29d

Maine State AG+36d

Pattern: first filing May 26 (IL), last Jul 1 (ME) — a 36-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 13 — the full spread may be wider.

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-74.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 13, 2022
Raw hash: b49139fb8b70a3d8cae23a2329ede3d440ce070e6e69061f6e313fd6915ad13e

Linked disclosures

Ransomware claims (1)

Regulatory filings (9) · sorted by filing gap

Reporting entityAon

Victim entityAon

Incidentdiscovered Feb 25, 2022

Stated responseRetained leading cybersecurity firms to assist in responding and help conduct a thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov