Social EngineeringGovernmentGovernmentPhishingTargetedCustomer Data InvolvedEmploymentFinancial accountIdentity (basic)Government IDMediumContained

Sno-Isle Regional Library System

bd_9146da687a63aa38 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 6, 2023

Filed

Apr 21, 2023

To disclose

15 days

Affected

531state residents only

Confidence

69%

Full breach record for Sno-Isle Regional Library System →

Sno-Isle Regional Library System notified Washington AG on April 21, 2023, of a phishing attack on March 22, 2023, that exposed employee PII (names, SSNs, wages) for 531 WA residents. First awareness was April 6, 2023. Credit monitoring offered.

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Washington clock✓ WA AG ≤30d15 days discovery → filing

Incident timeline

undetected · 15 days

discovery → filing · 15 days

Mar 22, 2023

Begins

Apr 6, 2023

Discovered

Apr 21, 2023

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed531 affectedView incident

Name: Sno-Isle Regional Library System
norm: sno isle regional library system
Domain: sno-isle.org

Name: Sno-Isle Regional Library System
norm: sno isle regional library system
Domain: sno-isle.org
Industry: Governmentllm

Discovered: Apr 6, 2023
Breach occurred: Mar 22, 2023
Undetected for: 15 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 21, 2023
Affected individuals: 531state-resident count only
Data types: Identity (basic)Government IDEmployment
Data elements: NameSocial Security numberFinancial account number
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 0d
WA-stated discovery: Found after the fact
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified federal law enforcement
Initial access: phishing_link

During the incident: Notified federal law enforcement
Providing affected Sno-Isle Libraries employees with access to credit monitoring for three years with all three credit bureaus through CLC ID Protect
Communicating to all relevant current and former employees
Changes made: Data encryption
Strong password protections
Aggressive security monitoring
Ongoing training
Continuing investments in cybersecurity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 days(15 days from discovery to filing)
Compliance flags: WA AG ≤30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA21861.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 21, 2023
Raw hash: 751e9993df9863c30bcd7985401f0edf1a93b01f43c8564419d193c72cf8373a

Reporting entitySno-Isle Regional Library System

Victim entitySno-Isle Regional Library System

Incidentdiscovered Apr 6, 2023

Stated responseNotified federal law enforcement

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com