HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

TD AMERITRADE CLEARING, INC.

bd_bbf1d3a4299b3121 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 30, 2023

Filed

Aug 8, 2023

To disclose

10 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

65%

Full breach record for TD AMERITRADE CLEARING, INC. →4 incidents on file

TD Ameritrade, Inc. disclosed a data breach involving unauthorized access to its MOVEit Transfer software application between May 28 and May 30, 2023. The incident was discovered on May 30, 2023. Affected data includes names, Social Security numbers, financial account information, dates of birth, and government ID numbers. TD Ameritrade halted use of the software, engaged independent experts, notified law enforcement, and is offering two years of credit monitoring.

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Leak gap clock⏱ Leak >30d10 weeks discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 10 weeks / 70 days

May 28, 2023

Begins

May 30, 2023

Discovered

Aug 8, 2023

Filed

vs. sector median

+2 wks slower

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

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

A leak claim by cl0p about this victim predates this filing by 32 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Montana State AGbd_2abddba09852610c2023-08-08Candidate

Name: TD AMERITRADE CLEARING, INC.
norm: td ameritrade clearing
Domain: tdameritrade.com

Name: TD AMERITRADE CLEARING, INC.
norm: td ameritrade clearing
Domain: tdameritrade.com
Industry: Financial Servicesllm

Discovered: May 30, 2023
Breach occurred: May 28, 2023 – May 30, 2023
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: External
Initial access: supply_chain

During the incident: Promptly halted any use of MOVEit Transfer
Thoroughly investigated the incident in close consultation with independent experts
Notified and have been working with law enforcement
Offering two years of credit monitoring and identity protection services from IdentityForce at no cost
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Montana State AGAug 8 · first

California State AGAug 8 · first · 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://oag.ca.gov/ecrime/databreach/reports/sb24-571503
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 8, 2023
Raw hash: 6f037b357ab603d76c60aec3b58fa6b58215222715b2552d018e1e035166f07f

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityTD AMERITRADE CLEARING, INC.

Victim entityTD AMERITRADE CLEARING, INC.

Incidentdiscovered May 30, 2023

Stated responsePromptly halted any use of MOVEit Transfer

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov