Was Cathexis Holdings LP hit by ransomware?

Cathexis Holdings LP was listed by the Interlock ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Interlock ransomware group?

Interlock is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Cathexis Holdings LP breach?

Interlock published data attributed to Cathexis Holdings LP, around 3M files records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Cathexis Holdings LP

Claimed by Interlock · listed 2 years ago

3M files

Records

21m

Age

since listed · data leaked

Status timeline

ListedOct 13, 2024
Data leakeddate unknown

At a glance

Group: Interlock
Status: Data leaked
Country: United States
Sector: Financial
Listed on leak site: Oct 13, 2024
Records: 3M files

About the victim

AI dossier — public-source company profile

Cathexis Holdings LP is a private investment holding company based in Houston, Texas, with a diversified portfolio spanning engineering services (Jones Engineering, Leo Lynch), hyperscale data center development and operations (400+ MW across North America, EU, and Asia), real estate development (major urban mixed-use projects in Houston and Boston), renewable energy (majority owner of Redeux Energy), and mineral assets (Eagle Ford Shale). The firm operates through multiple subsidiary and portfolio companies.

Industry: Private Investment & Holding Company
Address: 1000 Louisiana Street, Suite 7000, Houston, TX 77002

Attack summary

Severity: critical — Confirmed exfiltration of 3 million files from a major investment holding company with substantial financial, real estate, and energy portfolios. Exposure includes databases, emails, and corporate documents spanning multiple billion-dollar asset classes and subsidiary operations; represents significant operational, financial, and strategic risk.

Interlock claims to have exfiltrated nearly 3 million files from Cathexis Holdings' corporate network, including SQL databases, email backups, and corporate documents. The group has published the data without ransom demand.

critical

Data the group says was taken

AI dossier — extracted from the leak post

SQL databases
email backups
corporate documents
business records

What the group claims

Today, we unveil nearly 3 million files from the "Cathexis Holdings LP" corporate network. Dive into a wealth of SQL databases, email backups, and an expansive collection of corporate documents that offer unparalleled insights into one of the most diverse investment firms out there. Now, the information that drives billion-dollar decisions is at your fingertips, absolutely free! Transform your business with data that others pay a fortune for your path to insider knowledge starts today

Sources

Victim sitecathexis.com
Leak posthttp://ebhmkoohccl45qesdbvrjqtyro2hmhkmh6vkyfyjjzfllm3ix72aqaid.onion/Cathexis_Holdings_LP.php

Source

Indexed 2 years 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 Interlock

Interlock is a recently emerged ransomware group that began operations in October 2024, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's country of origin and potential affiliations remain unclear given their recent emergence, with insufficient public documentation to determine whether they operate as an independent entity or under a Ransomware-as-a-Service model. Limited public information exists regarding their specific attack methodologies, initial access vectors, or encryption techniques, as major cybersecurity firms and law enforcement agencies have not yet published comprehensive technical analyses of their operations. Since beginning operations, Interlock has reportedly compromised approximately 100 victims, with their targeting primarily focused on organizations in English-speaking countries including the United States, Canada, United Kingdom, and Australia, as well as Italy, while demonstrating a preference for attacking education, manufacturing, healthcare, and public sector entities. The group remains active as of late 2024, though comprehensive threat intelligence profiles from established security research organizations have not yet been published due to the group's recent emergence in the threat landscape. The group has been linked to 114 public disclosures across our corpus. First observed on a leak site on October 13, 2024; most recent post July 10, 2026. The operation is currently active.

Timeline of this disclosure

October 13, 2024Cathexis Holdings LP listed by Interlockon the group's public leak site

Records: 3M files

Other recent disclosures by Interlock

Interlock has been linked to 114 public victims on Darkfield. A sample of the most recent:

See the full Interlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial sector, which has 426 disclosures indexed across all operators we track. Geographically, Cathexis Holdings LP is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Interlock means Cathexis Holdings LP 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 Interlock'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.