Social EngineeringEnergy & UtilitiesUtilitiesPhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumResolved

CLEARWAY ENERGY, INC.

bd_557733f75196e341 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 19, 2020

Filed

May 20, 2021

To disclose

26 weeks

Affected

1state residents only

Confidence

65%

Full breach record for CLEARWAY ENERGY, INC. →

Clearway Energy Group LLC notified Montana residents of unauthorized access to an employee email account between Nov 19, 2020 and Feb 2, 2021. The incident involved phishing leading to credential compromise. Affected data included names and Social Security numbers. The company engaged a cybersecurity firm and offered one year of identity protection services.

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Incident timeline

discovery → filing · 26 weeks / 182 days

Nov 19, 2020

Begins

Nov 19, 2020

Discovered

May 20, 2021

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: CLEARWAY ENERGY, INC.
norm: clearway energy
Domain: clearwayenergy.com

Name: CLEARWAY ENERGY, INC.
norm: clearway energy
Domain: clearwayenergy.com
Industry: Energy & Utilitiesllm

Discovered: Nov 19, 2020
Breach occurred: Nov 19, 2020 – Feb 2, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 17, 2021
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Secured the email account
Engaged a cybersecurity firm
Conducted a thorough investigation
Offering a complimentary one-year membership in information and provides you with identity protection services
Changes made: Taking steps to further enhance our existing security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 weeks(182 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://dojmt.gov/wp-content/uploads/Clearnotif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 20, 2021
Raw hash: e7524ec7c8b2d1b70ecd7f5043ab56d4c64f6c8b854105e1f8d9265f42f65dae

Reporting entityCLEARWAY ENERGY, INC.

Victim entityCLEARWAY ENERGY, INC.

Incidentdiscovered Nov 19, 2020

Stated responseSecured the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov