Social EngineeringIdentity (basic)Government IDFinancial accountMediumContained

CREDIT SUISSE SECURITIES (USA) LLC

bd_ce1163533b037cee · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 23, 2021

Filed

Apr 6, 2021

To disclose

14 days

Affected · nationwide

651 in this filing

Confidence

66%

Full breach record for CREDIT SUISSE SECURITIES (USA) LLC →

Credit Suisse Securities (USA) LLC notified the New Hampshire Attorney General of a data breach occurring on or around March 20, 2021. An unauthorized individual sent an email containing personal information (name, SSN, bank account, DOB) of 65 former employees to a limited set of recipients. The incident was discovered on March 23, 2021. Credit Suisse provided 24 months of credit monitoring to affected individuals.

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Incident timeline

undetected · 3 days

discovery → filing · 14 days

Mar 20, 2021

Begins

Mar 23, 2021

Discovered

Apr 6, 2021

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed65 affectedView incident

Name: CREDIT SUISSE SECURITIES (USA) LLC
norm: credit suisse securities usa

Name: CREDIT SUISSE SECURITIES (USA) LLC
norm: credit suisse securities usa

Discovered: Mar 23, 2021
Breach occurred: Mar 20, 2021
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 2, 2021
Affected individuals: 65state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Initiated an investigation to determine the scope of the incident
Provided notice to affected former employees on April 2, 2021 via email address where available
Following up with a postal mail notification
Providing affected individuals with 24 months of credit monitoring services
Changes made: Review our security measures to assure protection of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 days(14 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/credit-suisse-securities-20210406.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 6, 2021
Raw hash: b10b66bff0792dcc9e4966d12e8aec7b7b84d2b8108bd3356e510fb520138067

Reporting entityCREDIT SUISSE SECURITIES (USA) LLC

Victim entityCREDIT SUISSE SECURITIES (USA) LLC

Incidentdiscovered Mar 23, 2021

Stated responseInitiated an investigation to determine the scope of the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov