MalwareEducationEducationRansomwareData EncryptedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

Sierra Joint Community College District

bd_f91c20c1f8745db7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 19, 2021

Filed

Aug 13, 2021

To disclose

12 weeks

Affected

Not disclosed

Confidence

66%

Full breach record for Sierra Joint Community College District →2 incidents on file

Sierra Joint Community College District experienced a ransomware incident on May 19, 2021, during which systems were encrypted. Forensic investigation determined that personal information, including names and potentially Social Security numbers, was accessed by an unauthorized individual. The district secured its network, engaged forensic investigators, and offered one year of complimentary credit monitoring to affected individuals.

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Incident timeline

discovery → filing · 12 weeks / 86 days

May 19, 2021

Begins

May 19, 2021

Discovered

Aug 13, 2021

Filed

vs. sector median

+5 wks slower

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

Name: Sierra Joint Community College District
norm: sierra joint community college district

Name: Sierra Joint Community College District
norm: sierra joint community college district
Industry: Educationllm

Discovered: May 19, 2021
Breach occurred: May 19, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)Government ID
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial

During the incident: Took immediate action to secure our network
Began the restoration process
Initiated an investigation into the cause and scope of the incident
Engaged a professional third-party forensic firm to assist
Changes made: Implemented additional measures to enhance the security of our network environment
Arranged for complimentary one-year membership to TransUnion’s identity monitoring service
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(86 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://oag.ca.gov/ecrime/databreach/reports/sb24-543883
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 13, 2021
Raw hash: afe1d704e6d80ae992164132822c75e15b7cce9d5602a2eb3881cf99e37809e5

Reporting entitySierra Joint Community College District

Victim entitySierra Joint Community College District

Incidentdiscovered May 19, 2021

Stated responseTook immediate action to secure our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov