AccidentalFinancial ServicesFinanceMisdeliveryCustomer Data InvolvedIdentity (basic)Government IDFinancialMediumResolved

Trustmark Mutual Holding Company

bd_1a66194c6ea5966c · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 14, 2015

Filed

Jun 22, 2015

To disclose

6 weeks

Affected

Not disclosed

Linked

4 filings

Confidence

64%

Trustmark Mutual Holding Company experienced a data breach on May 13, 2015, due to a software error in its automated billing e-mail system. Encrypted e-mails containing sensitive personal information (name, SSN, payroll deduction info) were inadvertently sent to multiple insurance carrier clients instead of just the relevant one. The error was discovered on May 14, 2015. Trustmark recalled the emails, confirmed deletion with recipients, corrected the software error, and implemented safeguards. Affected individuals were offered two years of identity protection via Experian.

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California clockDiscovered May 14, 2015 → Notified Jun 22, 201539d ✓ CA 60-day OK6 weeks discovery → filing

Incident timeline

undetected · 1 days

discovery → filing · 6 weeks / 39 days

May 13, 2015

Begins

May 14, 2015

Discovered

Jun 22, 2015

Filed

vs. sector median

3 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

New Hampshire State AGbd_cbd4dde28df412a62015-06-22Verified
South Carolina State AGbd_35d3cec9ec1ffb6b2015-06-29 · +7dVerified
Massachusetts State AGbd_f1d6160894b297d72015-06-29 · +7dVerified

Name: Trustmark Mutual Holding Company
norm: trustmark mutual holding
Domain: trustmarkbenefits.com

Name: Trustmark Mutual Holding Company
norm: trustmark mutual holding
Domain: trustmarkbenefits.com
Industry: Financial Servicesllm

Discovered: May 14, 2015
Breach occurred: May 13, 2015
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Jun 22, 2015
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial
Attack vector: Unknown

During the incident: Took steps to recall the emails
Contacted each insurance carrier recipient and requested confirmation that the emails and the attachments had been permanently deleted
Identified and corrected the software error that caused this incident
Implemented safeguards to ensure it does not occur again
Performed a thorough investigation in order to confirm the nature and scope of this incident
Engaged Experian to offer complimentary Fraud Resolution and identity protection for two years
Established a confidential inquiry line staffed with professionals trained in identity and credit protection and restoration
Changes made: Identified and corrected the software error that caused this incident
Implemented safeguards to ensure it does not occur again
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(39 days from discovery to filing)
Compliance flags: CA 60-day OK · 39d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: May 14, 2015
→ Notified: Jun 22, 2015
39d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: May 14, 2015 → Notified: Jun 22, 2015	39d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

New Hampshire State AGJun 22 · first

California State AGJun 22 · first · this page

South Carolina State AG+7d

Massachusetts State AG+7d

Pattern: first filing Jun 22 (NH), last Jun 29 (MA) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://oag.ca.gov/ecrime/databreach/reports/sb24-56493
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 22, 2015
Raw hash: cbb55eba1f5cc987ee8d6ff40ad80700a0e0e5017a68c31bc42a956e37ea815e

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityTrustmark Mutual Holding Company

Victim entityTrustmark Mutual Holding Company

Incidentdiscovered May 14, 2015

Stated responseTook steps to recall the emails

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov