HackingFinancial ServicesFinanceSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

Banco Popular de Puerto Rico

bd_450f31b4b76577de · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 25, 2021

To disclose

—

Affected

2state residents only

Linked

4 filings

Confidence

68%

Guidehouse filed a Montana breach notification on behalf of Banco Popular de Puerto Rico regarding a third-party vendor breach involving Accellion, Inc. software. Compromised data included names, addresses, account numbers, and Social Security numbers. Experian credit monitoring was offered.

J jump to incidentP pin to compareR raw source

Incident timeline — partial

? — ?

Breach window unknown

Jun 25, 2021

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_0708f8c7afa7fc0a2021-06-28 · +3dVerified
HHS OCRbd_a1315e93704516aa2021-07-15 · +20dCandidate
Montana State AGbd_466ff546cdc0a84a2021-07-29 · +34dCandidate

Name: GUIDEHOUSE INC.
norm: guidehouse

Name: Banco Popular de Puerto Rico
norm: banco popular de puerto rico
Industry: Financial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: Partner
Initial access: supply_chain

During the incident: Engaged Experian to provide Identity Works credit monitoring product
Ceased using the impacted software
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 3 states

View merged incident ↗

Montana State AGJun 25 · first · this page

Massachusetts State AG+3d

HHS OCR+20d

Montana State AG+34d

Pattern: first filing Jun 25 (MT), last Jul 29 (MT) — a 34-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://dojmt.gov/wp-content/uploads/OCP/a-notif-42.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 25, 2021
Raw hash: b7247fd5a18ea98403763358a39b610a3e60a92cd318c97a1dd5e3ff1cb007ad

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGUIDEHOUSE INC.

Victim entityBanco Popular de Puerto Rico

IncidentThird-Party / Supply Chain

Stated responseEngaged Experian to provide Identity Works credit monitoring product

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov