Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

GreatBanc Trust Company

bd_81f99a9f439c10ee · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 23, 2017

Filed

Jun 15, 2018

To disclose

34 weeks

Affected

71state residents only

Linked

5 filings

Confidence

65%

Full breach record for GreatBanc Trust Company →

GreatBanc Trust Company notified Montana residents of a phishing incident in October 2017 that compromised an employee email account. The attacker attempted to redirect wire transfer emails. Personal information (name, address, DOB, SSN) was present in the account. No evidence of data copying was found. The company engaged forensic specialists, retained counsel, and provided 12 months of identity protection services.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 34 weeks / 235 days

Oct 23, 2017

Begins

Oct 23, 2017

Discovered

Jun 15, 2018

Filed

vs. sector median

+25 wks slower

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

California State AGbd_b77fafab2a9b01232018-06-15Verified
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: Oct 23, 2017
Breach occurred: Oct 23, 2017 – Oct 29, 2017
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 15, 2018
Affected individuals: 71state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Hired a computer forensic specialist to assist us
Retained counsel experienced in data breach to assist us 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 your identity for 12 months at no cost
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 which will eliminate those from running through the email system
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 34 weeks(235 days from discovery to filing)
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 ↗

California State AGJun 15 · first

New Hampshire State AGJun 15 · first

Montana 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://dojmt.gov/wp-content/uploads/Great-Banc.pdf
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: c9cf8a44a2a7003dd70a89e91b40c7a6a36a4b82f26b8114aa2646e4bfe7d33c

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityGreatBanc Trust Company

Victim entityGreatBanc Trust Company

Incidentdiscovered Oct 23, 2017

Stated responseHired a computer forensic specialist to assist us

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov