Social EngineeringTechnologyManufacturingInformationPhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountMediumContained

Mattson Technology, Inc.

bd_627fc8278accf7a6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 3, 2022

Filed

Oct 27, 2023

To disclose

13 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 July 8, 2022, and October 3, 2022, following a phishing email received by employees on October 3. The attacker accessed and/or removed files containing personal information, including names, Social Security Numbers, and financial account data. Mattson secured its network, engaged third-party specialists, and notified law enforcement. Affected individuals are offered credit monitoring.

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Incident timeline

undetected · 87 days

discovery → filing · 13 months / 389 days

Jul 8, 2022

Begins

Oct 3, 2022

Discovered

Oct 27, 2023

Filed

vs. sector median

+37 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: Oct 3, 2022
Breach occurred: Jul 8, 2022 – Oct 3, 2022
Undetected for: 87 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Reported to federal law enforcementNotifying the appropriate regulators
Initial access: phishing_link

During the incident: Immediately took steps to secure our network
Launched an investigation with the assistance of third-party computer specialists
Undertook a thorough review of the impacted files
Reported this to federal law enforcement
Notifying the appropriate regulators, as required
Changes made: Implementing additional training to employees
Reviewing our policies, procedures, and protocols to reduce the likelihood of a similar event from occurring in the future
Offering complimentary credit monitoring through Equifax
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(389 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/sb24-575812
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 27, 2023
Raw hash: bd846f7c88c129bf9a51b9808d976e57464c3e0a4defa26e2abd6a46e636d3df

Reporting entityMattson Technology, Inc.

Victim entityMattson Technology, Inc.

Incidentdiscovered Oct 3, 2022

Stated responseImmediately took steps to secure our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov