HackingTechnologyManufacturingInformationStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Mattson Technology, Inc.

bd_1c3646bfe56ec04c · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 30, 2023

Filed

Sep 24, 2024

To disclose

17 months

Affected

Not disclosed

Confidence

66%

Full breach record for Mattson Technology, Inc. →4 incidents on file

Mattson Technology, Inc. disclosed that an unauthorized individual accessed its network between April 11 and April 29, 2023, and accessed or removed certain files. The company detected suspicious activity on April 30, 2023. The incident potentially impacted individuals' names, Social Security numbers, and financial account information. Mattson secured its network, reported the incident to federal law enforcement, and is offering credit monitoring to affected individuals.

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Incident timeline

undetected · 19 days

discovery → filing · 17 months / 513 days

Apr 11, 2023

Begins

Apr 30, 2023

Discovered

Sep 24, 2024

Filed

vs. sector median

+55 wks slower

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

Name: Mattson Technology, Inc.
norm: mattson technology

Name: Mattson Technology, Inc.
norm: mattson technology
Industry: TechnologyllmManufacturingllm

Discovered: Apr 30, 2023
Breach occurred: Apr 11, 2023 – Apr 29, 2023
Undetected for: 19 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Reported to federal law enforcement

During the incident: Secured network upon discovering suspicious activity
Launched investigation into the nature and scope of the activity
Reported this to federal law enforcement
Offering 12 months of complimentary credit monitoring through Equifax
Changes made: Implementing additional training to employees
Reviewing policies, procedures, and security tools to reduce the likelihood of a similar event from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 months(513 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/sb24-592359
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 24, 2024
Raw hash: eb9d6890cc6f24058f0fe52a0b892e2c3f4eaab4270b3edd3f52ab8d08ea7937

Reporting entityMattson Technology, Inc.

Victim entityMattson Technology, Inc.

Incidentdiscovered Apr 30, 2023

Stated responseSecured network upon discovering suspicious activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov