HackingFinancial ServicesFinanceCustomer Data InvolvedIdentity (basic)Financial accountMediumContained

Plains Commerce Bank

bd_0c2b14534f2a0dad · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 27, 2021

Filed

May 27, 2021

To disclose

4 weeks

Affected · nationwide

32,26819 in this filing

Linked

7 filings

Confidence

66%

Full breach record for Plains Commerce Bank →

Plains Commerce Bank reported an external system breach (hacking) occurring between December 10, 2020, and January 15, 2021, discovered on April 27, 2021. The incident affected 32,268 individuals, including 19 Maine residents. Acquired data included names and financial account or credit/debit card numbers (with security codes/PINs). The bank provided written notification and 12 months of credit monitoring via Experian.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Apr 27, 2021 → Filed with AG May 27, 202130d ✓ ME AG ≤30d4 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 · 138 days

discovery → filing · 4 weeks / 30 days

Dec 10, 2020

Begins

Apr 27, 2021

Discovered

May 27, 2021

Filed

vs. sector median

5 wks faster

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

California State AGbd_0428b6dd3ebc05fc2021-05-27Verified
Massachusetts State AGbd_2a861c05ece55b602021-05-27Verified
Montana State AGbd_7c8af5e8d5f5730e2021-05-27Verified
Indiana State AGbd_97a68cf8b20b6c812021-05-27Verified

Show 2 more filings ↓up to 146d gap

New Hampshire State AGbd_4b1061280c6de9ab2021-06-01 · +5dVerified
Illinois State AGbd_94edaa7272227ac72021-01-01 · +146dCandidate

Name: Plains Commerce Bank
norm: plains commerce bank
Domain: plainscommerce.com
Industry: Financial Services

Name: Plains Commerce Bank
norm: plains commerce bank
Domain: plainscommerce.com
Industry: Financial Services
Industry: Financial Servicesllm

Discovered: Apr 27, 2021
Breach occurred: Dec 10, 2020 – Jan 15, 2021
Undetected for: 138 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 27, 2021
Affected individuals: 32,268state + 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: ExternalFinancial
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

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

Time to disclose: 4 weeks(30 days from discovery to filing)
Compliance flags: ME AG ≤30d · 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: Apr 27, 2021
→ Filed with AG: May 27, 2021
30d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Apr 27, 2021 → Filed with AG: May 27, 2021	30d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Illinois State AGJan 1 · first

California State AG+146d

Massachusetts State AG+146d

Montana State AG+146d

Indiana State AG+146d

Maine State AG+146d · this page

New Hampshire State AG+151d

Pattern: first filing Jan 1 (IL), last Jun 1 (NH) — a 151-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-a1252b4f8318/0c32352f-8842-49af-b6d3-853d121aa598.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 27, 2021
Raw hash: 18b2eda179afc8e997a6230e08ed3f8df7269611e0ac172e056a151399f56cce

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityPlains Commerce Bank

Victim entityPlains Commerce Bank

Incidentdiscovered Apr 27, 2021

Stated responseSent written notification to affected consumers

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov