HackingManufacturingRetail & ConsumerManufacturingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)LowContained

Reliance Steel & Aluminum Co

bd_ca42a22aef4e1391 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 4, 2022

Filed

Aug 3, 2023

To disclose

16 months

Affected

1state residents only

Linked

4 filings

Confidence

65%

Full breach record for Reliance Steel & Aluminum Co →

Reliance Steel & Aluminum Co. notified Montana residents of a cybersecurity incident discovered on April 4, 2022. An unknown actor gained unauthorized access to systems between April 3-4, 2022. The breach impacted names and other personal data. Reliance engaged forensic specialists, secured systems, and offered 12 months of credit monitoring.

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Incident timeline

undetected · 1 days

discovery → filing · 16 months / 486 days

Apr 3, 2022

Begins

Apr 4, 2022

Discovered

Aug 3, 2023

Filed

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_26a9e2aab343c2122023-08-03Verified
Indiana State AGbd_a84b58bf570949e52023-08-03Verified
California State AGbd_caa1883ff43832112023-08-03Verified

Name: Reliance Steel & Aluminum Co
norm: reliance steel aluminum

Name: Reliance Steel & Aluminum Co
norm: reliance steel aluminum
Industry: ManufacturingllmRetail & Consumerllm

Discovered: Apr 4, 2022
Breach occurred: Apr 3, 2022 – Apr 4, 2022
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Aug 3, 2023
Affected individuals: 1state-resident count only
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: reported this event to appropriate state regulators
Initial access: valid_credentials

During the incident: Immediately took steps to secure our systems
Launched an investigation with the assistance of third-party computer forensic specialists
Undertook a comprehensive and time-intensive review of the potentially impacted files
Worked to confirm the identities and contact information for potentially affected individuals
Offering complimentary credit monitoring and identity restoration services through IDX for twelve (12) months
Reported this event to appropriate state regulators
Changes made: Reviewed our security policies and procedures to reduce the risk of similar future events
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 months(486 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Massachusetts State AGAug 3 · first

Indiana State AGAug 3 · first

California State AGAug 3 · first

Montana State AGAug 3 · first · this page

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/OCP/Consumer-notification-letter-511.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 3, 2023
Raw hash: 4de2e4992df0128444ab3f068c87ec65dcf609d17aacaa34e597f218cd52f3b8

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityReliance Steel & Aluminum Co

Victim entityReliance Steel & Aluminum Co

Incidentdiscovered Apr 4, 2022

Stated responseImmediately took steps to secure our systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov