HackingFinancial ServicesFinanceVulnerability ExploitData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

Tri Counties Bank

bd_0119439d398a4f92 · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 9, 2023

Filed

Nov 22, 2023

To disclose

6 weeks

Affected · nationwide

74,38524 in this filing

Linked

11 filings

Confidence

66%

Full breach record for Tri Counties Bank →

Tri Counties Bank reported an external system breach (hacking) occurring on 02/07/2023 and discovered on 10/09/2023. The incident affected 74,385 individuals, including 24 Maine residents. Acquired data included names, personal identifiers, and financial account or credit/debit card numbers. The bank provided written notification and offered 24 months of credit monitoring and identity restoration services through Experian.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d6 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 · 244 days

discovery → filing · 6 weeks / 44 days

Feb 7, 2023

Begins

Oct 9, 2023

Discovered

Nov 22, 2023

Filed

vs. sector median

2 wks faster

This filing is one of 11 about the same incident.View merged incident

A leak claim by black_basta about this victim predates this filing by 247 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteblack_bastabd_8a1c05db9a0376c62023-03-19 · +247dVerified by operator

Regulatory filings (9) · sorted by filing gap

New Hampshire State AGbd_3d1dd695dbfc9eb92023-11-22Verified by operator
California State AGbd_9d8a5b82fc79f5002023-11-22Verified by operator
Vermont State AGbd_af220720d4d002912023-11-22Verified by operator
SEC 8-Kbd_1297d2dd698bf7122023-10-13 · +40dCandidate

Show 5 more filings ↓up to 41d gap

Maine State AGbd_201ae7fa1e3c8a632023-10-12 · +41dVerified by operator
Montana State AGbd_3f1547cf3ba03ec12023-10-12 · +41dVerified by operator
Indiana State AGbd_459843a2f6e73e1c2023-10-12 · +41dVerified
Massachusetts State AGbd_c631857751f1f3bd2023-10-12 · +41dVerified by operator
California State AGbd_f2b2a26ac629eb7b2023-10-12 · +41dCandidate

Name: Tri Counties Bank
norm: tri counties bank
Domain: tcbk.com
Industry: Financial Services

Name: Tri Counties Bank
norm: tri counties bank
Domain: tcbk.com
Industry: Financial Services
Industry: Financial Servicesllm

Discovered: Oct 9, 2023
Breach occurred: Feb 7, 2023
Undetected for: 244 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 12, 2023
Affected individuals: 74,385state + 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 24 months of credit monitoring and identity restoration services through Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(44 days from discovery to filing)
Compliance flags: Leak >180dME AG >30d · 44d
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: Oct 9, 2023
→ Filed with AG: Nov 22, 2023
44d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 9, 2023 → Filed with AG: Nov 22, 2023	44d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 7 states

View merged incident ↗

Maine State AGOct 12 · first

Montana State AGOct 12 · first

Indiana State AGOct 12 · first

Massachusetts State AGOct 12 · first

California State AGOct 12 · first

SEC 8-K+1d

New Hampshire State AG+41d

California State AG+41d

Vermont State AG+41d

Maine State AG+41d · this page

Pattern: first filing Oct 12 (ME), last Nov 22 (ME) — a 41-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/c3cf3179-ed79-4766-8750-2f4f2fe06a22.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 22, 2023
Raw hash: 37be407e78d63639be1c585a104cb97116dbbaef07210eb086af076c8cbd3293

Linked disclosures

Ransomware claims (1)

Regulatory filings (9) · sorted by filing gap

Reporting entityTri Counties Bank

Victim entityTri Counties Bank

Incidentdiscovered Oct 9, 2023

Stated responseSent written notification to affected individuals

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov