HackingFinancial ServicesFinanceStolen CredentialsCharles LittlejohnData ExfiltratedTargetedIdentity (basic)Government IDMediumActive

Big Sky Investment Holdings LLC

bd_1075ff524685c349 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

May 16, 2024

To disclose

—

Affected

7state residents only

Linked

2 filings

Confidence

68%

Full breach record for Big Sky Investment Holdings LLC →

Big Sky Investment Holdings LLC notifies Montana investors that a former IRS contractor, Charles Littlejohn, stole tax information between 2018-2020. The LLC received an IRS notice indicating possible exposure of investor data (names, SSNs/EINs) from K-1 forms. No specific data breach at the LLC was confirmed, but notification is sent out of caution.

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Incident timeline — partial

? — ?

Breach window unknown

May 16, 2024

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_ffe87f54af545c7a2024-05-16Verified

Name: Big Sky Investment Holdings LLC
norm: big sky investment

Name: Big Sky Investment Holdings LLC
norm: big sky investment
Industry: Financial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 7state-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 LittlejohnPartnerFinancial
Regulator citations: Received Letter 6613-A notice from the IRS
Initial access: valid_credentials

During the incident: Sending notification letters to investors
Providing link to IRS information regarding the Littlejohn case
Providing contact information for Department of Justice and IRS
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 · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGMay 16 · first

Montana State AGMay 16 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1375.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: f9136866dcdde616120de9f38df97e126316bb0c3e7f875b1f986bfbb33fd139

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityBig Sky Investment Holdings LLC

Victim entityBig Sky Investment Holdings LLC

IncidentThird-Party / Supply Chain

Stated responseSending notification letters to investors

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov