HackingRetail & ConsumerRetailStolen CredentialsData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Identity (basic)Financial accountFinancial credentialsMediumContained

Warner Music Group

bd_adff23c1da81b497 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 5, 2020

Filed

Sep 2, 2020

To disclose

28 days

Affected

3,368state residents only

Linked

7 filings

Confidence

69%

Full breach record for Warner Music Group →3 incidents on file

Warner Music Group notified Washington AG of a cyberattack on its e-commerce websites hosted by an external provider. Unauthorized access occurred between April 25 and August 5, 2020, compromising customer PII and payment card details. Approximately 3,368 Washington residents were affected. WMG engaged forensic experts, notified law enforcement and card providers, and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✓ WA AG ≤30d28 days 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 · 102 days

discovery → filing · 28 days

Apr 25, 2020

Begins

Aug 5, 2020

Discovered

Sep 2, 2020

Filed

vs. sector median

6 wks faster

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

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

South Carolina State AGbd_07f2cbb6b77f4ab82020-09-02Verified
Montana State AGbd_291443e8a85002962020-09-02Verified
California State AGbd_4c882e60c07278442020-09-02Verified
Indiana State AGbd_13e339efa758f9df2020-09-03 · +1dVerified

Show 2 more filings ↓up to 7d gap

New Hampshire State AGbd_35175c3bfdf953a22020-09-04 · +2dVerified
Massachusetts State AGbd_1d2a6092d2d3c24c2020-09-09 · +7dVerified

Name: Warner Music Group
norm: warner music
Domain: warnermusic.com

Name: Warner Music Group
norm: warner music
Domain: warnermusic.com
Industry: Retail & Consumerllm

Discovered: Aug 5, 2020
Breach occurred: Apr 25, 2020 – Aug 5, 2020
Undetected for: 102 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 3, 2020
Affected individuals: 3,368state-resident count only
Data types: Identity (basic)Financial accountFinancial credentials
Data elements: NameFinancial account number
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 100-199dexposure 100-199d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Office of the Attorney General
Initial access: exploit_public_facing

During the incident: Launched a thorough forensic investigation with the assistance of leading outside cybersecurity experts
Notified the relevant card providers
Notified law enforcement
Engaged Kroll Information Assurance, LLC, to provide 12 months of free credit monitoring and identity theft protection services
Changes made: Took steps to address and correct the issue
Conducts daily scans to monitor for any suspicious activity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 days(28 days from discovery to filing)
Compliance flags: WA 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 · 7 filings · 7 states

View merged incident ↗

South Carolina State AGSep 2 · first

Montana State AGSep 2 · first

California State AGSep 2 · first

Washington State AGSep 2 · first · this page

Indiana State AG+1d

New Hampshire State AG+2d

Massachusetts State AG+7d

Pattern: first filing Sep 2 (SC), last Sep 9 (MA) — a 7-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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM10282.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 2, 2020
Raw hash: c02c3b43c443766f8a497f8943541b79ab31e8be9d3b65fa120e901cd457227d

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityWarner Music Group

Victim entityWarner Music Group

Incidentdiscovered Aug 5, 2020

Stated responseLaunched a thorough forensic investigation with the assistance of leading outside cybersecurity experts

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com