HackingFinancial ServicesFinanceVulnerability ExploitCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

Enterprise Bank and Trust Company

bd_8245d00213282a7f · schema v1 · pii pii-v1

Severity

High

Discovered

Dec 1, 2023

Filed

Jan 22, 2024

To disclose

7 weeks

Affected · nationwide

1,3074 in this filing

Confidence

64%

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 May 27, 2023, discovered on December 1, 2023. The incident affected 1,307 individuals, including 4 Maine residents. Acquired data included names, personal identifiers, and financial account or credit/debit card numbers (with security codes/PINs). The bank provided written notification on January 22, 2024, and offered 12 months of credit monitoring and identity restoration services via Kroll.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Dec 1, 2023 → Filed with AG Jan 22, 202452d ⏱ ME AG >30d7 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 · 188 days

discovery → filing · 7 weeks / 52 days

May 27, 2023

Begins

Dec 1, 2023

Discovered

Jan 22, 2024

Filed

vs. sector median

1 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1,307 affectedView incident

A leak claim by cl0p about this victim predates this filing by 180 days.View originating leak claim

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

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

Discovered: Dec 1, 2023
Breach occurred: May 27, 2023
Undetected for: 188 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 22, 2024
Affected individuals: 1,307state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Financial account number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

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

Time to disclose: 7 weeks(52 days from discovery to filing)
Compliance flags: ME AG >30d · 52dLeak >90d
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: Dec 1, 2023
→ Filed with AG: Jan 22, 2024
52d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Dec 1, 2023 → Filed with AG: Jan 22, 2024	52d	30 days (soft)	ME AG >30d

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/c2ea1291-50ff-4af3-b9df-dac51682a34f.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 22, 2024
Raw hash: 6fe5b08ca394e404767b9d0c5628ee4cdc49f6152d7cd67bedaf9b380b73bd67

Reporting entityEnterprise Bank and Trust Company

Victim entityEnterprise Bank and Trust Company

Incidentdiscovered Dec 1, 2023

Stated responseSent written notification to affected individuals

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov