HackingGovernmentGovernmentStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedPIIIdentity (basic)LowContained

Alameda-Contra Costa Transit District

bd_1496dfeb74794abb · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 16, 2020

Filed

Mar 11, 2021

To disclose

38 weeks

Affected

3state residents only

Linked

5 filings

Confidence

65%

Full breach record for Alameda-Contra Costa Transit District →

Alameda-Contra Costa Transit District notified Montana residents that unauthorized access to employee email accounts occurred between April 7 and June 16, 2020. The incident involved names and other personal information. The District reset credentials, engaged forensic investigators, and offered credit monitoring.

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Incident timeline

undetected · 70 days

discovery → filing · 38 weeks / 268 days

Apr 7, 2020

Begins

Jun 16, 2020

Discovered

Mar 11, 2021

Filed

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

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_e3a36108977257f02021-03-11Verified
California State AGbd_948719381df6f5562021-03-15 · +4dVerified
Massachusetts State AGbd_958292882fafd8712021-03-15 · +4dVerified
Maine State AGbd_9d023167638599a62021-03-15 · +4dCandidate

Name: Alameda-Contra Costa Transit District
norm: alameda contra costa transit district

Name: Alameda-Contra Costa Transit District
norm: alameda contra costa transit district
Industry: Governmentllm

Discovered: Jun 16, 2020
Breach occurred: Apr 7, 2020 – Jun 16, 2020
Undetected for: 70 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 3state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Resetting the credentials of the compromised email accounts
Retained a leading forensic security firm to investigate and conduct a comprehensive search for any personal information in the impacted email accounts, and to confirm the security of our email and computer systems
Offering a complimentary one-year membership of IdentityWorksSM Credit 3B
Changes made: Enhancing our data security protocols and staff training
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(268 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Indiana State AGMar 11 · first

Montana State AGMar 11 · first · this page

California State AG+4d

Massachusetts State AG+4d

Maine State AG+4d

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://dojmt.gov/wp-content/uploads/actranSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 11, 2021
Raw hash: a19c1bd2d147a22f8388c92cd5a586bdf4ea08f0ed13e0fbf684b9d49feb4948

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityAlameda-Contra Costa Transit District

Victim entityAlameda-Contra Costa Transit District

Incidentdiscovered Jun 16, 2020

Stated responseResetting the credentials of the compromised email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov