Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)Government IDMediumResolved

GreatBanc Trust Company

bd_b77fafab2a9b0123 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 15, 2018

To disclose

—

Affected

Not disclosed

Linked

5 filings

Confidence

76%

Full breach record for GreatBanc Trust Company →

GreatBanc Trust Company, serving as ESOP trustee, experienced an email phishing attack during the week of October 23, 2017. An unauthorized third party accessed one of GreatBanc's email accounts and created a folder to redirect wire-transfer-related emails. An email account review determined personal information (name, address, date of birth, and/or SSN) of plan participants was contained in the account. Notification letters were sent in June 2018. Remediation included 2FA implementation and staff training.

J jump to incidentP pin to compareR raw source

Incident timeline

Oct 23, 2017

Begins

Jun 15, 2018

Filed

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

Montana State AGbd_81f99a9f439c10ee2018-06-15Candidate
New Hampshire State AGbd_f89cba7178f455372018-06-15Verified
Massachusetts State AGbd_5c2ca6a5104f4a522018-06-18 · +3dVerified
South Carolina State AGbd_bc2b2a9f2c179d7b2018-06-19 · +4dVerified

Name: GreatBanc Trust Company
norm: greatbanc trust
Domain: greatbanctrust.com

Name: GreatBanc Trust Company
norm: greatbanc trust
Domain: greatbanctrust.com
Industry: Financial Servicesllm

Discovered: —
Breach occurred: Oct 23, 2017 – Oct 29, 2017
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566 PhishingT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Hired a computer forensic specialist to assist with the investigation
Retained counsel experienced in data breach to assist with complying with regulatory requirements
Undertook a comprehensive review of all of the information contained in the email account
Arranged to have AllClear ID protect identity for 12 months at no cost to affected individuals
Changes made: Implemented additional educational training and testing
Implemented two-factor authentication before emails can be accessed outside the office
Implementing a portal for transfer of sensitive documents to eliminate those from running through the email system
Source: Quoted from the filing itself, not independently verified.

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 ↗

Montana State AGJun 15 · first

New Hampshire State AGJun 15 · first

California State AGJun 15 · first · this page

Massachusetts State AG+3d

South Carolina State AG+4d

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/sb24-137157
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 15, 2018
Raw hash: 435568ea8d564b8b9088e280dc73575f45c3381697721a638caaf81885e662b1

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityGreatBanc Trust Company

Victim entityGreatBanc Trust Company

IncidentPhishing

Stated responseHired a computer forensic specialist to assist with the investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov