HackingFinancial ServicesFinanceCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

MISSION BANK

bd_7c5f8b4a3c098d28 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 2, 2024

Filed

Jan 7, 2025

To disclose

5 weeks

Affected

Not disclosed

Linked

5 records

Confidence

64%

Full breach record for MISSION BANK →2 incidents on file

Mission Bank experienced a network security incident on December 2, 2024, where an unauthorized party gained access to certain systems. The bank isolated impacted systems and engaged forensic specialists. Affected data may include names, SSNs, DOBs, addresses, phone numbers, driver's license/passport numbers, and financial account numbers. Core banking systems were not affected. The bank is offering 12 months of complimentary credit monitoring and fraud assistance.

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California clockDiscovered Dec 2, 2024 → Notified Dec 31, 202429d ✓ CA 60-day OK5 weeks discovery → filing

Incident timeline

discovery → filing · 5 weeks / 36 days

Dec 2, 2024

Begins

Dec 2, 2024

Discovered

Jan 7, 2025

Filed

vs. sector median

3 wks faster

This filing is one of 5 records about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteransomhubbd_d54f57ee18d6f5302025-01-23 · +16dCandidate

Regulatory filings (3) · sorted by filing gap

Montana State AGbd_36afb6655f680ae22025-01-07Candidate
New Hampshire State AGbd_1ec0ec35daba041a2025-01-22 · +15dVerified
Maine State AGbd_2e038e092086f93a2025-01-22 · +15dVerified by operator

Name: MISSION BANK
norm: mission bank
Domain: missionbank.bank

Name: MISSION BANK
norm: mission bank
Domain: missionbank.bank
Industry: Financial Servicesllm

Discovered: Dec 2, 2024
Breach occurred: Dec 2, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 31, 2024
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified law enforcement

During the incident: Secured the environment by isolating the impacted systems
Engaged third-party forensic specialists to investigate the incident
Notified law enforcement
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance
Changes made: Reviewing technical safeguards
Looking into enhancements to prevent a similar incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(36 days from discovery to filing)
Compliance flags: CA 60-day OK · 29d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Dec 2, 2024
→ Notified: Dec 31, 2024
29d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Dec 2, 2024 → Notified: Dec 31, 2024	29d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGJan 7 · first

California State AGJan 7 · first · this page

New Hampshire State AG+15d

Maine State AG+15d

Pattern: first filing Jan 7 (MT), last Jan 22 (ME) — a 15-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://oag.ca.gov/ecrime/databreach/reports/sb24-597028
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 7, 2025
Raw hash: 0e26ba48e7f3e9477db8e8cb5584d07520b1781443c4ceac196029436d347849

Linked disclosures

Ransomware claims (1)

Regulatory filings (3) · sorted by filing gap

Reporting entityMISSION BANK

Victim entityMISSION BANK

Incidentdiscovered Dec 2, 2024

Stated responseSecured the environment by isolating the impacted systems

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov