HackingRetail & ConsumerRetailStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountMediumContained

Best Buy Co., Inc.

bd_c151e1ec0393f78d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 12, 2017

Filed

Apr 17, 2018

To disclose

27 weeks

Affected

4,716state residents only

Confidence

64%

Full breach record for Best Buy Co., Inc. →5 incidents on file

Best Buy notified customers of a data breach involving third-party vendor [24]7.ai. Malicious code inserted in vendor software between Sept 26 and Oct 12, 2017, allowed unauthorized access to payment card data (names, addresses, card numbers, CVV) for customers shopping on BestBuy.com during that period. Best Buy engaged forensic experts, removed the code, and offered 1 year of credit monitoring via Identity Guard.

J jump to incidentP pin to compareR raw source

South Carolina clock✓ SC CRA notice due27 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 16 days

discovery → filing · 27 weeks / 187 days

Sep 26, 2017

Begins

Oct 12, 2017

Discovered

Apr 17, 2018

Filed

vs. sector median

+19 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed4,716 affectedView incident

Name: Best Buy Co., Inc.
norm: best buy

Name: Best Buy Co., Inc.
norm: best buy
Industry: Retail & Consumerllm

Discovered: Oct 12, 2017
Breach occurred: Sep 26, 2017 – Oct 12, 2017
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 12, 2018
Affected individuals: 4,716state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: supply_chain

During the incident: Engaged leading data security experts to assist with the investigation
Confirmed that the malicious code had been removed from its software
Confirmed that the unauthorized access had been stopped
Made changes to how the [24]7.ai software operates on our site
Arranged with Identity Guard to provide identity theft services, including credit monitoring, at no cost
Changes made: Changes to how the [24]7.ai software operates on our site
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(187 days from discovery to filing)
Compliance flags: SC CRA notice due
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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://consumer.sc.gov/sites/consumer/files/Documents/Business%20Resources%20Laws/Related%20Laws/Breaches/2018/BestBuyInc..pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 17, 2018
Raw hash: 81d7672a0902074bfe1d719bcf6acb642a255ea8a81aaa1166aff591f07eccc5

Reporting entityBest Buy Co., Inc.

Victim entityBest Buy Co., Inc.

Incidentdiscovered Oct 12, 2017

Stated responseEngaged leading data security experts to assist with the investigation

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov