HackingFinancial ServicesFinanceVulnerability ExploitStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedGovernment IDIdentity (basic)Financial accountMediumContained

Wheelock Street Capital

bd_57d63f6922eaf250 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 1, 2025

Filed

Sep 4, 2026

To disclose

40 weeks

Affected

2state residents only

Linked

3 records

Confidence

69%

Full breach record for Wheelock Street Capital →

Wheelock Street Capital, LLC experienced a data breach involving unauthorized access to a third-party Managed Service Provider (Gladinet) server between November 27 and December 1, 2025. The incident was discovered on December 1, 2025. An unauthorized individual viewed and obtained files containing personal information, including Social Security numbers, driver's license numbers, and financial account information. Two New Hampshire residents were confirmed affected. The company engaged a cybersecurity firm, took systems offline, and notified law enforcement. Affected individuals were notified on September 2, 2026, and offered complimentary identity monitoring services.

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Leak gap clock✗ Leak >180d40 weeks discovery → filing

Incident timeline

undetected · 4 days

discovery → filing · 40 weeks / 277 days

Nov 27, 2025

Begins

Dec 1, 2025

Discovered

Sep 4, 2026

Filed

vs. sector median

+31 wks slower

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

A leak claim by cl0p about this victim was first seen 209 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_905b0fced52d45e62026-02-07 · +208dVerified

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_f168e44b61be234c2026-09-01 · +3dCandidate

Name: Wheelock Street Capital
norm: wheelock street
Domain: wheelockst.com

Name: Wheelock Street Capital
norm: wheelock street
Domain: wheelockst.com
Industry: Financial Servicesllm

Discovered: Dec 1, 2025
Breach occurred: Nov 27, 2025 – Dec 1, 2025
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 2, 2026
Affected individuals: 2state-resident count only
Data types: Government IDIdentity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General pursuant to N.H. Rev. Stat. §359-C:19
Third party: via Gladinet
Initial access: supply_chain

During the incident: Implemented its incident response protocols
Took certain systems offline
Launched an investigation
Engaged a cybersecurity firm experienced in responding to similar incidents to assist
Reported the incident to law enforcement
Provided written notice of this incident to two (2) New Hampshire residents
Offered the residents complimentary identity monitoring services
Changes made: Continues to work with its IT professionals to further enhance the security of its systems
Will continue to review its network security
Updating policies and procedures as appropriate
Providing notified individuals access to complimentary identity monitoring services
Provided individuals with guidance on how to protect against identity theft and fraud
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 40 weeks(277 days from discovery to filing)
Compliance flags: Leak >180d
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 · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGSep 1 · first

New Hampshire State AG+3d · 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://mm.nh.gov/files/uploads/doj/remote-docs/wheelock-street-capital-20260904.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 4, 2026
Raw hash: a5c03f8166492e73986dd19a6bbe800629424d035849782ef36e40a59e3e1368

Linked disclosures

Ransomware claims (1)

Regulatory filings (1) · sorted by filing gap

Reporting entityWheelock Street Capital

Victim entityWheelock Street Capital

Incidentdiscovered Dec 1, 2025

Stated responseImplemented its incident response protocols

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov