MalwareManufacturingTechnologyManufacturingRansomwareData ExfiltratedRansom DemandedTargetedIdentity (basic)Government IDMediumContained

OSI SYSTEMS, INC.

bd_5de9a0ae9cba5679 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 25, 2025

Filed

Mar 11, 2026

To disclose

11 weeks

Affected

538state residents only

Linked

10 filings

Confidence

70%

Full breach record for OSI SYSTEMS, INC. →

OSI Systems, Inc. reported a ransomware cyberattack in Washington affecting 538 residents. Unauthorized access occurred between Dec 23-25, 2025. Data included names, SSNs, and DOBs. OSI engaged forensic specialists, notified law enforcement, and provided 12 months of credit monitoring.

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Leak gap clock⏱ Leak >30d11 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 2 days

discovery → filing · 11 weeks / 76 days

Dec 23, 2025

Begins

Dec 25, 2025

Discovered

Mar 11, 2026

Filed

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteinc_ransombd_0fe82859b7e740312025-12-30 · +71dVerified

Regulatory filings (8) · sorted by filing gap

Nebraska State AGbd_03b6bd32acad77302026-03-11Verified
New Hampshire State AGbd_0a97f13a9774839c2026-03-11Verified by operator
Maine State AGbd_1be6cf685a8a18642026-03-11Verified
Indiana State AGbd_70c902ae9bbbfa9f2026-03-11Verified

Show 4 more filings ↓up to 1d gap

Massachusetts State AGbd_7bfa9894135dbf542026-03-11Verified by operator
California State AGbd_f9015384334e14fd2026-03-11Verified
Texas State AGbd_a5c9fc36c25a18cd2026-03-12 · +1dVerified
Vermont State AGbd_c9de4de82a0958042026-03-10 · +1dVerified by operator

Name: OSI SYSTEMS, INC.
norm: osi systems
Domain: osi-systems.com
Industry: Manufacturing

Name: OSI SYSTEMS, INC.
norm: osi systems
Domain: osi-systems.com
Industry: Manufacturing
Industry: ManufacturingllmTechnologyllm

Discovered: Dec 25, 2025
Breach occurred: Dec 23, 2025 – Dec 25, 2025
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 11, 2026
Affected individuals: 538state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameSocial Security numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Providing written notice of this event to appropriate state regulators
Initial access: valid_credentials

During the incident: Initiated an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through IDX, to individuals whose personal information was potentially affected by this incident, at no cost to these individuals
Providing written notice of this event to appropriate state regulators and the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implementing additional security measures to further protect against similar incidents occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(76 days from discovery to filing)
Compliance flags: Leak >30dWA AG >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Vermont State AGMar 10 · first

Nebraska State AG+1d

New Hampshire State AG+1d

Maine State AG+1d

Indiana State AG+1d

Massachusetts State AG+1d

California State AG+1d

Washington State AG+1d · this page

Texas State AG+2d

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA37027.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 11, 2026
Raw hash: a71bb828e2bafe971dabe95ad3420c494ca19f5dadc1fbceafe99f84dfb6682b

Linked disclosures

Ransomware claims (1)

Regulatory filings (8) · sorted by filing gap

Reporting entityOSI SYSTEMS, INC.

Victim entityOSI SYSTEMS, INC.

Incidentdiscovered Dec 25, 2025

Stated responseInitiated an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com