MalwareRetail & ConsumerRetailRansomwareStolen CredentialsData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Identity (basic)Financial accountCredentialsLowContained

Costco

bd_5fe9eca8c784fcfe · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 17, 2015

Filed

Sep 22, 2015

To disclose

10 weeks

Affected

198state residents only

Linked

3 filings

Confidence

66%

Full breach record for Costco →2 incidents on file

Costco Photo Center experienced a security compromise via its hosting provider. An unauthorized party accessed the host system from June 19, 2014, to July 15, 2015, deploying malware that captured user input. Costco notified approximately 198 New Hampshire residents whose credit card info, names, addresses, emails, and passwords may have been compromised. Costco engaged forensic investigators, took the site offline, deleted stored card data, and provided credit monitoring services.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 393 days

discovery → filing · 10 weeks / 67 days

Jun 19, 2014

Begins

Jul 17, 2015

Discovered

Sep 22, 2015

Filed

vs. sector median

+2 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Washington State AGbd_ac6baa130a725d302015-09-22Verified
Massachusetts State AGbd_97a5559f454bed292015-09-25 · +3dVerified

Name: Costco
norm: costco
Domain: costco.com

Name: Costco
norm: costco
Domain: costco.com
Industry: Retail & Consumerllm

Discovered: Jul 17, 2015
Breach occurred: Jun 19, 2014 – Jul 15, 2015
Undetected for: 393 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 21, 2015
Affected individuals: 198state-resident count only
Data types: Identity (basic)Financial accountCredentials
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified State of New Hampshire Department of Justice Office of the Attorney General
Initial access: supply_chain

During the incident: Took the Site offline entirely
Engaged a third-party forensic vendor to investigate
Deleted all stored credit card information
Brought the site back online with limited functionality and new security measures
Informed the credit reporting agencies and payment card networks
Requiring that all users reset their passwords
Arranged for identity theft recovery and credit monitoring services from ID Experts
Changes made: Rebuilt site with additional security measures at a variety of levels
New payment technology with enhanced security features
Work closely with hosting company to implement security tools and tests
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(67 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Washington State AGSep 22 · first

New Hampshire State AGSep 22 · first · this page

Massachusetts State AG+3d

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://mm.nh.gov/files/uploads/doj/remote-docs/costco-photo-20150922.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 22, 2015
Raw hash: 20d061efae5ea49f3ea6c6de139db0063b4131de9f72a8bb69cb58ef362b910d

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityCostco

Victim entityCostco

Incidentdiscovered Jul 17, 2015

Stated responseTook the Site offline entirely

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov