Social EngineeringFinancial ServicesHealthcareFinancePhishingStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDPIIMediumContained

The Unum Group / Colonial Life and Accident Insurance

bd_9df32f4c1524d9a6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 28, 2018

Filed

Jan 18, 2019

To disclose

7 weeks

Affected

1state residents only

Confidence

65%

Full breach record for The Unum Group / Colonial Life and Accident Insurance →

Colonial Life and Accident Insurance notified Montana residents of a social engineering incident targeting employee credentials from June to October 2018. Unauthorized parties accessed Office 365 email accounts, exposing names, SSNs, and coverage elections. The company was aware of the compromise by November 28, 2018, and provided 12 months of identity protection services.

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Incident timeline

undetected · 180 days

discovery → filing · 7 weeks / 51 days

Jun 1, 2018

Begins

Nov 28, 2018

Discovered

Jan 18, 2019

Filed

vs. sector median

1 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: The Unum Group / Colonial Life and Accident Insurance
norm: the unum group colonial life and accident insurance

Name: The Unum Group / Colonial Life and Accident Insurance
norm: the unum group colonial life and accident insurance
Industry: Financial ServicesllmHealthcarellm

Discovered: Nov 28, 2018
Breach occurred: Jun 1, 2018 – Oct 31, 2018
Undetected for: 180 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 18, 2019
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDPII
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Arranged to have AllClear ID protect your identity for 12 months at no cost to you
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(51 days from discovery to filing)
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/The-Unum-Group-Colonial-Life-and-Accident-Insurance.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 18, 2019
Raw hash: 0000c0aebd7f7a8feca37f459c620c5a5762cb10ead754c1d71bb25965906dc3

Reporting entityThe Unum Group / Colonial Life and Accident Insurance

Victim entityThe Unum Group / Colonial Life and Accident Insurance

Incidentdiscovered Nov 28, 2018

Stated responseArranged to have AllClear ID protect your identity for 12 months at no cost to you

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov