Social EngineeringFinancial ServicesFinancePhishingTargetedIdentity (basic)LowContained

ELLINGTON MANAGEMENT GROUP, L.L.C.

bd_30c661b64bc6498c · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 8, 2023

Filed

Nov 10, 2023

To disclose

13 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

66%

Full breach record for ELLINGTON MANAGEMENT GROUP, L.L.C. →2 incidents on file

Ellington Management Group, L.L.C. notified consumers of a data breach where an unauthorized actor accessed a single email account between July 18 and August 8, 2023, to send phishing emails. No data exfiltration was found, but personal information (names, contact details) was present. Ellington engaged cybersecurity professionals, notified law enforcement, and offered 12 months of credit monitoring via Kroll.

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Vermont clock✗ VT AG >45 bday13 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 21 days

discovery → filing · 13 weeks / 94 days

Jul 18, 2023

Begins

Aug 8, 2023

Discovered

Nov 10, 2023

Filed

vs. sector median

+5 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_177e02641a7af4832023-11-10Verified
Montana State AGbd_f7a5bb29d8e2588f2023-11-10Candidate

Name: ELLINGTON MANAGEMENT GROUP, L.L.C.
norm: ellington management

Name: ELLINGTON MANAGEMENT GROUP, L.L.C.
norm: ellington management
Industry: Financial Servicesllm

Discovered: Aug 8, 2023
Breach occurred: Jul 18, 2023 – Aug 8, 2023
Undetected for: 21 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 10, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: notified federal law enforcement
Initial access: phishing_link

During the incident: Changed passwords
Notified federal law enforcement
Engaged leading cybersecurity professionals for assistance
Working with a leading data security and privacy firm to aid our investigation
Implemented additional security protocols designed to protect our network, email environment, and systems
Assessing the entirety of our information security program
Secured the services of Kroll to provide identity monitoring at no cost to you for twelve (12) months
Changes made: Implemented additional security protocols designed to protect our network, email environment, and systems
Assessing the entirety of our information security program
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(94 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGNov 10 · first

Montana State AGNov 10 · first

Vermont State AGNov 10 · 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://ago.vermont.gov/document/2023-11-10-ellington-management-group-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 10, 2023
Raw hash: 07b8455c605d11954fcfdff791de30cc7da0d7515e4a73515efd20072bb99dfe

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityELLINGTON MANAGEMENT GROUP, L.L.C.

Victim entityELLINGTON MANAGEMENT GROUP, L.L.C.

Incidentdiscovered Aug 8, 2023

Stated responseChanged passwords

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov