Social EngineeringFinancial ServicesFinanceStolen CredentialsCharles LittlejohnData ExfiltratedTargetedIdentity (basic)Government IDMediumActive

YC Holdings, LLC

bd_d31e1dc1ab2e38e9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

May 16, 2024

To disclose

—

Affected

4state residents only

Confidence

68%

Full breach record for YC Holdings, LLC →

YC Holdings, LLC notified Montana investors that their data may have been compromised in the Charles Littlejohn IRS contractor breach. The LLC received an IRS notice indicating unauthorized access to tax information between 2018 and 2020. Affected data likely includes names, addresses, and SSNs/EINs from K-1 forms. The LLC is notifying investors out of caution as the IRS has not confirmed specific data exposure for the LLC.

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Incident timeline — partial

? — ?

Breach window unknown

May 16, 2024

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed4 affectedView incident

Name: YC Holdings, LLC
norm: yc holdings

Name: YC Holdings, LLC
norm: yc holdings
Industry: Financial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain· Charles Littlejohn
MITRE ATT&CK: T1078 Valid AccountsT1530 Data from Cloud Storage Object
Threat actor: Charles LittlejohnExternalFinancial
Regulator citations: Received Letter 6613-A notice from the IRS
Third party: via Internal Revenue Service (IRS)
Initial access: valid_credentials

During the incident: Sending notification letters to investors
Providing information about the Littlejohn case and Crime Victims’ Rights Act
Providing contact information for credit reporting agencies to place security freezes
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.

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-1373.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 16, 2024
Raw hash: 256a286183a13ed6049cdb519b819a684ee2a30358bd216b15fb458cdf337854

Reporting entityYC Holdings, LLC

Victim entityYC Holdings, LLC

IncidentThird-Party / Supply Chain

Stated responseSending notification letters to investors

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov