MalwareFinancial ServicesTechnologyFinanceRansomwareData EncryptedData ExfiltratedCustomer Data InvolvedFinancial accountIdentity (basic)Government IDHighContained

US TIGER SECURITIES INC.

bd_74b756aa1437bfe2 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 10, 2025

Filed

May 15, 2026

To disclose

44 weeks

Affected

1,019state residents only

Linked

10 filings

Confidence

64%

Full breach record for US TIGER SECURITIES INC. →

US Tiger Securities Inc. reported a cybersecurity incident on July 10, 2025, involving the encryption of files in a virtual back-office environment supporting US Tiger and TradeUP Securities. An unauthorized third party copied files between July 8-9, 2025. The incident did not impact TradeUP's production trading environment. Personal information, including names, was involved. US Tiger engaged legal and forensic counsel, conducted a data review, and is offering 24 months of Experian IdentityWorks to affected individuals. Notification was sent on May 15, 2026.

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Massachusetts clock✗ MA AG >90d44 weeks discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 44 weeks / 309 days

Jul 8, 2025

Begins

Jul 10, 2025

Discovered

May 15, 2026

Filed

vs. sector median

+36 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Vermont State AGbd_08d3e651a1fbee442026-05-15Verified
Texas State AGbd_11827b814e70462f2026-05-15Verified
Washington State AGbd_678b9bdd9ac8e7f02026-05-15Verified
New Hampshire State AGbd_7fa2aa1eedf7d7e42026-05-15Verified

Show 5 more filings ↓up to 14d gap

Indiana State AGbd_9083d9bde07929f22026-05-15Verified
Maine State AGbd_a75c3a2bd552ad812026-05-15Verified
Nebraska State AGbd_c9a9cbe6cc21dd882026-05-15Verified
California State AGbd_f29aee610e2ff2c92026-05-15Verified
Illinois State AGbd_3875ceca556ae0292026-05-01 · +14dVerified

Name: US TIGER SECURITIES INC.
norm: us tiger securities

Name: US TIGER SECURITIES INC.
norm: us tiger securities
Industry: Financial ServicesllmTechnologyllm

Discovered: Jul 10, 2025
Breach occurred: Jul 8, 2025 – Jul 9, 2025
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 15, 2026
Affected individuals: 1,019state-resident count only
Data types: Financial accountIdentity (basic)Government ID
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Engaged legal counsel to provide legal advice for an investigation
Engaged a cybersecurity firm to conduct a forensic investigation
Conducted a robust review of the data to identify individuals
Worked to obtain addresses and notify individuals
Implemented and will continue to adopt additional safeguards and technical security measures
Arranged for you to receive a complimentary 24-month subscription to Experian IdentityWorks
Changes made: Implemented additional safeguards and technical security measures to further protect and monitor network, systems, and data
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 44 weeks(309 days from discovery to filing)
Compliance flags: MA AG >90d
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 · 10 filings · 10 states

View merged incident ↗

Illinois State AGMay 1 · first

Vermont State AG+14d

Texas State AG+14d

Washington State AG+14d

New Hampshire State AG+14d

Indiana State AG+14d

Maine State AG+14d

Nebraska State AG+14d

California State AG+14d

Massachusetts State AG+14d · this page

Pattern: first filing May 1 (IL), last May 15 (MA) — a 14-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://www.mass.gov/doc/2026-786-us-tiger-securities-inc-tiger/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 15, 2026
Raw hash: cee60c9cda499f2eda78b578626ad1c27f9772d551e45934192821afcfa0e4e2

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityUS TIGER SECURITIES INC.

Victim entityUS TIGER SECURITIES INC.

Incidentdiscovered Jul 10, 2025

Stated responseEngaged legal counsel to provide legal advice for an investigation

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov