Social EngineeringPIIIdentity (basic)Financial accountLowContained

ULTRA CLEAN HOLDINGS, INC.

bd_e8e9dcedfef9c1c5 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 5, 2020

Filed

Oct 23, 2020

To disclose

11 weeks

Affected

1state residents only

Linked

7 filings

Confidence

65%

Full breach record for ULTRA CLEAN HOLDINGS, INC. →2 incidents on file

Ultra Clean Holdings, Inc. notified Montana residents of a phishing incident occurring August 3-4, 2020, discovered August 5, 2020. Attackers obtained personal information via email phishing. The company provided two years of credit monitoring and identity restoration through Experian.

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Incident timeline

undetected · 2 days

discovery → filing · 11 weeks / 79 days

Aug 3, 2020

Begins

Aug 5, 2020

Discovered

Oct 23, 2020

Filed

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Maine State AGbd_9f16c0167e7bd3582020-10-23Candidate
Indiana State AGbd_03edadda5870d6cf2020-11-09 · +17dVerified
Oregon State AGbd_10838ceb3c5347372020-11-10 · +18dVerified
Maine State AGbd_5db3f2dc02d3ea4d2020-12-17 · +55dVerified

Show 2 more filings ↓up to 61d gap

New Hampshire State AGbd_e5a5b45aee7556d32020-12-21 · +59dVerified
California State AGbd_c786788ea36385512020-12-23 · +61dVerified

Name: ULTRA CLEAN HOLDINGS, INC.
norm: ultra clean
Domain: uct.com

Name: ULTRA CLEAN HOLDINGS, INC.
norm: ultra clean
Domain: uct.com

Discovered: Aug 5, 2020
Breach occurred: Aug 3, 2020 – Aug 4, 2020
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 23, 2020
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)Financial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Provided complimentary two-year subscription to Experian’s IdentityWorks
Offered identity restoration services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(79 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 6 states

View merged incident ↗

Maine State AGOct 23 · first

Montana State AGOct 23 · first · this page

Indiana State AG+17d

Oregon State AG+18d

Maine State AG+55d

New Hampshire State AG+59d

California State AG+61d

Pattern: first filing Oct 23 (ME), last Dec 23 (CA) — a 61-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.

Source URL: https://dojmt.gov/wp-content/uploads/uctSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 23, 2020
Raw hash: 5260269daa9cfa67a44906096bc83a6e6f7fd3f9fdf0fb7e86bec5f3da80d7db

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityULTRA CLEAN HOLDINGS, INC.

Victim entityULTRA CLEAN HOLDINGS, INC.

Incidentdiscovered Aug 5, 2020

Stated responseProvided complimentary two-year subscription to Experian’s IdentityWorks

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov