HackingTelecom & MediaInformationBrute ForceCustomer Data InvolvedCredentialsIdentity (basic)MediumResolved

SPRINT LLC

bd_ca7ba9f6530ec0a9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 14, 2019

Filed

May 13, 2019

To disclose

9 weeks

Affected · nationwide

25,90917 in this filing

Linked

2 filings

Confidence

66%

Full breach record for SPRINT LLC →4 incidents on file

Sprint Corporation (Boost Mobile) notified the NH Attorney General of a brute force attack on Boost.com starting March 14, 2019. An unauthorized person accessed customer accounts using phone numbers and PIN codes. Access was blocked on March 18, 2019, and a permanent fix deployed April 1, 2019. 25,909 customers were impacted, including 17 New Hampshire residents. Affected data included credentials (PINs) and basic identity information (phone numbers). Sprint reset PINs and established a care team.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 9 weeks / 60 days

Mar 14, 2019

Begins

Mar 14, 2019

Discovered

May 13, 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

California State AGbd_f231d37ce66882082019-05-09 · +4dCandidate

Name: SPRINT CAPITAL CORPORATION
norm: sprint capital

Name: SPRINT LLC
norm: sprint
Domain: hub-sprint.com
Industry: Telecom & Mediallm

Discovered: Mar 14, 2019
Breach occurred: Mar 14, 2019 – Mar 18, 2019
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 9, 2019
Affected individuals: 25,909state + nationwide
Data types: CredentialsIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1110 Brute Force
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General pursuant to Right to Privacy Act
Initial access: valid_credentials

During the incident: Access was blocked immediately on March 18, 2019
A permanent solution went live on April 1, 2019
Reset PIN codes for all the affected accounts
Established a dedicated Care Team to assist affected customers
Sent text notifications to customers with a link to change PIN codes
Changes made: Implemented a permanent solution to prevent similar unauthorized account activity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 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 ↗

California State AGMay 9 · 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/sprint-20190513.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 13, 2019
Raw hash: 0a56ebb4c70258e74508bb17637c45a2933f315fcc0f5080f70c59a44ce5dd22

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entitySPRINT CAPITAL CORPORATION

Victim entitySPRINT LLC

Incidentdiscovered Mar 14, 2019

Stated responseAccess was blocked immediately on March 18, 2019

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov