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Argentem Creek Partners (investment firm)

Claimed by N0n · listed 3 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 18, 2026
  2. Data leakeddate unknown

At a glance

Group
N0n
Status
Data leaked
Country
United States
Sector
Financial Services
Listed on leak site
Sep 18, 2026

About the victim

AI dossier — public-source company profile

Argentem Creek Partners is an emerging markets investment specialist firm focusing on Latin America, Emerging Asia, and Eastern Europe. The firm offers special situations and structured capital solutions to investors, claiming over 250 years of cumulative team experience.

Industry
Investment Management & Private Credit

Attack summary

Severity: high — Confirmed exfiltration of significant business infrastructure data (complete network maps, connection records, internal systems) and tax/investor documents from a financial services firm; operational disruption claimed (network blackout).

N0n claims to have exfiltrated the firm's complete corporate network evidence including 2.5M+ connection records and internal systems maps (Active Directory, SharePoint, MSP tooling, office-security integrations), along with tax-season document flows from the firm and its investor document delivery platform. The group states corporate connectivity has been severed until settlement.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • 2.5M+ connection records
  • Active Directory configuration
  • SharePoint contents
  • MSP tooling access
  • Office-security integrations
  • Tax-season documents
  • Investor document delivery platform data

What the group claims

Investment management / private credit · United States | Full corporate network evidence: 2.5M+ connection records, complete internal systems map (Active Directory, SharePoint, MSP tooling, office-security integrations); Tax-season document flows of the firm and its investor document delivery platform | Corporate connectivity remains severed until settlement. | [ACTIVE: deadline 2026-09-21 03:01 UTC]

The leak post

captured from the group's site
# Your data has a deadline.
Organizations below lost control of their networks. When the countdown ends without payment, their data becomes public. Those who honored their deadline are remembered with respect.
Victim representatives: use the personal key from your ransom note to reach your negotiation room.
Marketing analytics SaaS / data platform · United States
#### What will be published if no settlement is reached
  * Full multi-tenant production database: 73,254 platform users across 11,504 customer tenants, 151,311 end-client records with names, emails, phone numbers and addresses
  * 36,948 OAuth grants to customers' advertising accounts (Facebook Ads, Google Ads, LinkedIn, Mailchimp, Shopify and others) across 5,515 tenants
  * Production database archive manifest: 4 TB of per-tenant database archives including LoanDepot, Toptal, Scripps, Advance Digital, Wpromote, Greystar, Cumulus Media and thousands more


Their 5,000+ customers will be notified directly.
Education / Labor Union · US — New York
#### What will be published if no settlement is reached
  * The union’s complete legal case archive — approx. 181,420 documents: grievance and arbitration files, disciplinary appe…

Sources

Source

Indexed 3 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About N0n

N0n is a ransomware operator currently tracked by Darkfield. The group has been linked to 9 public disclosures across our corpus. First observed on a leak site on September 18, 2026. The operation is currently active.

Timeline of this disclosure

  • September 18, 2026Argentem Creek Partners (investment firm) listed by N0n on the group's public leak site

Other recent disclosures by N0n

N0n has been linked to 9 public victims on Darkfield. A sample of the most recent:

See the full N0n dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,195 disclosures indexed across all operators we track. Geographically, Argentem Creek Partners (investment firm) is reported in United States, a country with 3,167 ransomware disclosures in our corpus.

If your organisation is affected

A listing by N0n means Argentem Creek Partners (investment firm) appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on N0n's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.