DisclosureLens
MalwareTechnologyManufacturingInformationRansomwareData EncryptedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountFinancial credentialsEmploymentHealth (basic)CredentialsMediumContained

MKS Instruments, Inc

bd_7ab949b29245ba5a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 13, 2023

Filed

Feb 15, 2023

To disclose

2 days

Affected

Not disclosed

Linked

8 filings

Confidence

66%
Full breach record for MKS Instruments, Inc →2 incidents on file

MKS Instruments, Inc. disclosed a ransomware incident discovered on February 13, 2023. The attack encrypted business and manufacturing systems. While exfiltration of personal employee data has not been confirmed, it cannot be ruled out. Potentially affected data includes names, contact info, SSNs, login credentials, bank account info, and health/employment data. The company activated incident response, engaged outside experts, notified law enforcement, and is offering 2 years of identity monitoring.

California clockDiscovered Feb 13, 2023 → Notified Feb 16, 20232d ✓ CA 60-day OK2 days discovery → filing

Incident timeline

discovery → filing · ≤1 day / 1 days

Feb 13, 2023

Discovered

Feb 15, 2023

Filed

vs. sector median

11 wks faster

This filing is one of 8 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Show 3 more filings ↓up to 9d gap

Filing propagation · 8 filings · 6 states

View merged incident ↗
SEC 8-KFeb 6 · first
California State AG+9d · this page

Pattern: first filing Feb 6, last Feb 16 (MT) — a 10-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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.