AccidentalEnergy & UtilitiesUtilitiesMisdeliveryCustomer Data InvolvedGovernment IDIdentity (basic)MediumResolved

MARATHON PETROLEUM COMPANY LP

bd_b4a88e47ff71c718 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 8, 2019

Filed

Apr 15, 2019

To disclose

5 weeks

Affected

2state residents only

Linked

2 filings

Confidence

66%

Full breach record for MARATHON PETROLEUM COMPANY LP →

Marathon Petroleum Company LP mistakenly posted IRS Form 8955-SSA containing SSNs and names of former employees to its benefits website between Nov 28, 2018 and Mar 8, 2019. The breach affected 2 New Hampshire residents. MPC removed the file, improved procedures, and offered credit monitoring.

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Incident timeline

undetected · 100 days

discovery → filing · 5 weeks / 38 days

Nov 28, 2018

Begins

Mar 8, 2019

Discovered

Apr 15, 2019

Filed

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_ec495399768c56e82019-04-11 · +4dVerified

Name: MARATHON PETROLEUM COMPANY LP
norm: marathon petroleum

Name: MARATHON PETROLEUM COMPANY LP
norm: marathon petroleum
Industry: Energy & Utilitiesllm

Discovered: Mar 8, 2019
Breach occurred: Nov 28, 2018 – Mar 8, 2019
Undetected for: 100 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 8, 2019
Affected individuals: 2state-resident count only
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Misconfiguration
Regulator citations: Notified New Hampshire Consumer Protection Bureau

During the incident: Removed the posted information from its website upon learning of the Data Breach
Reviewed and improved internal data protection procedures
Offered free credit monitoring services to affected individuals
Changes made: Reviewed and improved internal data protection procedures to make sure this situation does not recur
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(38 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGApr 11 · first

New Hampshire State AG+4d · 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://mm.nh.gov/files/uploads/doj/remote-docs/marathon-petroleum-20190415.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 15, 2019
Raw hash: 3d46ac5afaeaa929da3387d4f133e245965777631ed66498c4dd82717a885a27

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMARATHON PETROLEUM COMPANY LP

Victim entityMARATHON PETROLEUM COMPANY LP

Incidentdiscovered Mar 8, 2019

Stated responseRemoved the posted information from its website upon learning of the Data Breach

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov