HackingFinancial ServicesTechnologyFinanceStolen CredentialsCustomer Data InvolvedMulti-Stage ChainPIIIdentity (basic)LowContained

APEX CLEARING CORPORATION

bd_3a9057f3d2bde877 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 22, 2022

To disclose

—

Affected

8state residents only

Linked

6 filings

Confidence

66%

Full breach record for APEX CLEARING CORPORATION →

Apex Clearing Corporation notified Montana residents of a data breach involving unauthorized access to its systems via stolen Monorail Securities credentials between March and October 2022. Apex engaged forensic investigators, notified law enforcement, and offered 12 months of identity monitoring to affected individuals.

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Incident timeline

Mar 1, 2022

Begins

Dec 22, 2022

Filed

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_0def4f0d4ad56cf82022-12-22Verified
New Hampshire State AGbd_3347d5f9f86d252c2022-12-22Verified
Massachusetts State AGbd_88ecc72114f7395b2022-12-22Verified
Maine State AGbd_ecf20a22bfccfed92022-12-22Verified by operator

Show 1 more filing ↓up to 1d gap

Maine State AGbd_337dd6181775ad842022-12-21 · +1dCandidate

Name: APEX CLEARING CORPORATION
norm: apex clearing

Name: APEX CLEARING CORPORATION
norm: apex clearing
Industry: Financial ServicesllmTechnologyllm

Discovered: —
Breach occurred: Mar 1, 2022 – Oct 31, 2022
Materiality determined: —
Notification sent: —
Affected individuals: 8state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Provided new credentials to Monorail
Implemented additional precautions designed to further prevent unauthorized access to Apex systems
Launched an investigation
Engaged a leading cybersecurity forensics firm to assist in the investigation
Notified law enforcement
Changes made: Offered 12 months of identity monitoring services from Kroll at no cost
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 · 6 filings · 5 states

View merged incident ↗

Maine State AGDec 21 · first

Indiana State AG+1d

New Hampshire State AG+1d

Massachusetts State AG+1d

Maine State AG+1d

Montana State AG+1d · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-25.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 22, 2022
Raw hash: 05ce7ac042514c5e12aabfff0275e0547566d081eb0ecd29f7195e5981659b40

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityAPEX CLEARING CORPORATION

Victim entityAPEX CLEARING CORPORATION

IncidentUnauthorized Access

Stated responseProvided new credentials to Monorail

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov