HackingFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDFinancial accountMediumContained

Plains Commerce Bank

bd_4b1061280c6de9ab · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 12, 2021

Filed

Jun 1, 2021

To disclose

20 weeks

Affected

8state residents only

Linked

7 filings

Confidence

66%

Full breach record for Plains Commerce Bank →

Plains Commerce Bank notified the NH AG of a data event affecting 8 NH residents. Suspicious activity in an employee email account was discovered Jan 12, 2021. Access occurred Dec 10, 2020–Jan 15, 2021. Data included names, addresses, SSNs, and financial info. Notices sent May 27, 2021. Credit monitoring offered.

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Incident timeline

undetected · 33 days

discovery → filing · 20 weeks / 140 days

Dec 10, 2020

Begins

Jan 12, 2021

Discovered

Jun 1, 2021

Filed

vs. sector median

+11 wks slower

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_0428b6dd3ebc05fc2021-05-27 · +5dVerified
Maine State AGbd_0c2b14534f2a0dad2021-05-27 · +5dVerified
Massachusetts State AGbd_2a861c05ece55b602021-05-27 · +5dVerified
Montana State AGbd_7c8af5e8d5f5730e2021-05-27 · +5dVerified

Show 2 more filings ↓up to 151d gap

Indiana State AGbd_97a68cf8b20b6c812021-05-27 · +5dVerified
Illinois State AGbd_94edaa7272227ac72021-01-01 · +151dCandidate

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

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

Discovered: Jan 12, 2021
Breach occurred: Dec 10, 2020 – Jan 15, 2021
Undetected for: 33 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 27, 2021
Affected individuals: 8state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Provided written notice of this incident to other state regulators, as necessary
Initial access: phishing_link

During the incident: Launched an investigation to determine the nature and scope of the activity
Working with third-party forensic investigators
Took steps to secure their systems
Provided written notice of this incident to all potentially affected individuals
Providing access to credit monitoring services for twelve (12) months, through Experian
Changes made: Implement additional safeguards and training to its employees
Review our policies and procedures in order to ensure we protect the security of information on our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 weeks(140 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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

Maine State AG+146d

Massachusetts State AG+146d

Montana State AG+146d

Indiana State AG+146d

New Hampshire State AG+151d · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/plains-commerce-bank-20210601.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 1, 2021
Raw hash: e530ceabc3306c5d718fa509e68130704e92c1216718a6becf7b89585638aa87

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityPlains Commerce Bank

Victim entityPlains Commerce Bank

Incidentdiscovered Jan 12, 2021

Stated responseLaunched an investigation to determine the nature and scope of the activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov