Social EngineeringProfessional ServicesProfessional ServicesPhishingCustomer Data InvolvedIdentity (basic)Government IDFinancialMediumResolved

Kantar Group

bd_32fa29c4714ccdc3 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 9, 2016

Filed

Mar 21, 2016

To disclose

12 days

Affected

4state residents only

Linked

2 filings

Confidence

66%

Full breach record for Kantar Group →

Kantar Group notified Montana residents that employee W2 tax forms containing names, SSNs, addresses, and salaries were sent to an unauthorized party via phishing on March 1, 2016. Discovered March 9, 2016. Kantar offered two years of Experian ProtectMyID identity protection services.

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Incident timeline

undetected · 8 days

discovery → filing · 12 days

Mar 1, 2016

Begins

Mar 9, 2016

Discovered

Mar 21, 2016

Filed

vs. sector median

17 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_46b86bf9164b3e972016-03-23 · +2dVerified

Name: Kantar Group
norm: kantar group

Name: Kantar Group
norm: kantar group
Industry: Professional Servicesllm

Discovered: Mar 9, 2016
Breach occurred: Mar 1, 2016
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 21, 2016
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government IDFinancial
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Working with federal and state tax authoritiesWorking with law enforcement
Initial access: phishing_link

During the incident: Working with federal and state tax authorities, legal and tax experts, and law enforcement
Offering a complimentary two-year membership of Experian’s ProtectMyID Alert
Established a dedicated Call Center with Experian
Changes made: Offering complimentary two-year membership of Experian’s ProtectMyID Alert
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 days(12 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Montana State AGMar 21 · first · this page

Massachusetts State AG+2d

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/Kantar-Group.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 21, 2016
Raw hash: 5cd813b286d4345f45229d5db3067f062e2a3e9a7d382ac33097024151ef3fb7

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityKantar Group

Victim entityKantar Group

Incidentdiscovered Mar 9, 2016

Stated responseWorking with federal and state tax authorities, legal and tax experts, and law enforcement

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov