HackingEducationEducationStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDHighContained

Evergreen Public Schools

bd_ba1c2c2264416248 · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 24, 2020

Filed

Oct 12, 2020

To disclose

18 days

Affected

3,585state residents only

Confidence

70%

Full breach record for Evergreen Public Schools →

Evergreen Public Schools notified the WA AG of a cyberattack on an employee's Office 365 email account. Unauthorized access occurred between Sept 14-24, 2020. The incident involved potential unauthorized access to employee names and SSNs. 3,585 employees were notified. No evidence confirmed data was accessed.

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Washington clock✓ WA AG ≤30d18 days 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 · 10 days

discovery → filing · 18 days

Sep 14, 2020

Begins

Sep 24, 2020

Discovered

Oct 12, 2020

Filed

vs. sector median

6 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3,585 affectedView incident

Name: Stevens/Clay, ps.
norm: stevens clay

Name: Evergreen Public Schools
norm: evergreen public schools
Industry: Educationllm

Discovered: Sep 24, 2020
Breach occurred: Sep 14, 2020 – Sep 24, 2020
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 7, 2020
Affected individuals: 3,585state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameSocial Security number
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified Washington Attorney General
Initial access: valid_credentials

During the incident: IT department immediately launched an investigation
IT department undertook a comprehensive review of the contents of the email account
EPS provided written notice of the incident to employees
EPS provided individuals with the contact details for the national consumer reporting agencies
EPS provided information on how to obtain a free credit report
EPS encouraged individuals to contact the Federal Trade Commission, their state Attorney General, and law enforcement
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 days(18 days from discovery to filing)
Compliance flags: WA AG ≤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.

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/BreachM10334.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 12, 2020
Raw hash: dfc0b137d09e700a66b9435bb4aa7c494f85506503ea8061c46831f9251b89f1

Reporting entityStevens/Clay, ps.

Victim entityEvergreen Public Schools

Incidentdiscovered Sep 24, 2020

Stated responseIT department immediately launched an investigation

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com