HackingFinancial ServicesFinanceCustomer Data InvolvedIdentity (basic)Financial accountMediumContained

Enterprise Bank and Trust Company

bd_b19276c8873bf3ea · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2023

Filed

Sep 7, 2023

To disclose

14 weeks

Affected · nationwide

1,31424 in this filing

Linked

3 filings

Confidence

65%

Full breach record for Enterprise Bank and Trust Company →5 incidents on file

Enterprise Bank & Trust Company (MA) reported an external system breach (hacking) occurring on 05/27/2023, discovered on 06/01/2023. The incident affected 1,314 individuals, including 24 Maine residents. Acquired data included names and financial account numbers (combined with security codes/PINs). The bank provided written notification and 12-24 months of credit monitoring via Experian.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Jun 1, 2023 → Filed with AG Sep 7, 202398d ✗ ME AG >90d14 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 5 days

discovery → filing · 14 weeks / 98 days

May 27, 2023

Begins

Jun 1, 2023

Discovered

Sep 7, 2023

Filed

vs. sector median

+6 wks slower

This filing is one of 3 about the same incident.View merged incident

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

A leak claim by cl0p about this victim predates this filing by 43 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_3567d4db5edda8732023-09-07Verified
Vermont State AGbd_a5756f65ca3456db2023-08-07 · +31dVerified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Enterprise Bank and Trust Company
norm: enterprise bank and
Domain: enterprisebanking.com
Industry: Financial Servicesllm

Discovered: Jun 1, 2023
Breach occurred: May 27, 2023
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 7, 2023
Affected individuals: 1,314state + nationwide
Data types: Identity (basic)Financial account
Data elements: Financial account number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Sent written notification to affected individuals
Offered 12-24 months of identity theft and credit monitoring services through Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(98 days from discovery to filing)
Compliance flags: ME AG >90d · 98dLeak >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Jun 1, 2023
→ Filed with AG: Sep 7, 2023
98d 90 days ME AG >90d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Jun 1, 2023 → Filed with AG: Sep 7, 2023	98d	90 days	ME AG >90d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Vermont State AGAug 7 · first

Massachusetts State AG+31d

Maine State AG+31d · this page

Pattern: first filing Aug 7 (VT), last Sep 7 (ME) — a 31-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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/bf45f371-03d3-4bb3-9df0-f140c07d3698.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 7, 2023
Raw hash: e12ba8adcfb2d1bb46eff47f61b2e4f77f18598dda817a70d26ea2f42a28c408

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityEnterprise Bank and Trust Company

Incidentdiscovered Jun 1, 2023

Stated responseSent written notification to affected individuals

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov