Was Cullum Services hit by ransomware?

Cullum Services was listed by the Losttrust 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 Losttrust ransomware group?

Losttrust 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 Cullum Services breach?

Losttrust published data attributed to Cullum Services. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Cullum Services, Inc.

listed as Cullum Services · Claimed by Losttrust · listed 3 years ago

34m

Age

since listed · data leaked

Status timeline

ListedSep 26, 2023
Data leakeddate unknown

At a glance

Group: Losttrust
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Sep 26, 2023

About the victim

AI dossier — public-source company profile

Cullum Services, Inc. is a mechanical maintenance, repair, and retrofit services company operating in South Carolina since 1999, formed as a subsidiary of Cullum Mechanical Construction, Inc. (founded 1972). The company operates out of four offices across the state (North Charleston, Columbia, Florence, and Greenville) and maintains over 90,000 square feet of sheet metal and pipe fabrication shop space. It serves commercial, industrial, and institutional clients across the Southeast with HVAC, plumbing, process piping, and related mechanical services.

Industry: Mechanical Contracting & HVAC Services
Address: North Charleston, South Carolina, United States (corporate office); additional offices in Columbia, Florence, and Greenville, SC
Founded: 1999

Attack summary

Severity: high — Data has been published by the threat actor (data_published status), confirming exfiltration. The company serves military, government, healthcare, and data center clients, raising the likelihood of sensitive operational or contractual data being involved. No specific regulated data volume was confirmed, but the sectoral exposure and confirmed publication warrant a high severity rating.

The Losttrust ransomware group claims to have compromised Cullum Services, Inc. and has published data from the victim, as indicated by the 'data_published' disclosure status. No specific details on encryption or volume of exfiltrated data were stated in the leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company internal documents
Business records

What the group claims

Cullum Services, Inc., has provided mechanical maintenance, repair and retrofit services in South Carolina since 1972. It has offices across the state (North Charleston, Columbia, Florence and Greenville) and over 90,000 square feet in sheet metal and pipe fabrication shops. This infrastructure ensures that inventory is readily available and service is timely. Cullum Services, Inc. is a subsidiary of Cullum Mechanical Construction, Inc., and sister company of Cullum Constructors, Inc.

Sources

Victim sitehttps://culluminc.com

Source

Indexed 3 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 Losttrust

Losttrust is a relatively new ransomware group that emerged in September 2023, operating with apparent financial motivations and demonstrating a broad international targeting scope across multiple sectors. The group's origin and affiliations remain largely undocumented by major threat intelligence organizations, with limited public reporting from established security firms regarding their operational structure or potential ransomware-as-a-service connections. Based on available victim data, Losttrust appears to employ opportunistic targeting methods, having compromised 53 known victims across diverse geographic regions including the United States, Italy, Germany, Argentina, and India, with particular focus on education, legal services, media organizations, food and agriculture companies, and government entities. The specific attack methodologies, initial access vectors, encryption techniques, and extortion tactics employed by Losttrust have not been extensively documented in public threat intelligence reports from major security vendors or law enforcement agencies. Given the group's recent emergence and limited visibility in established threat intelligence channels, their current operational status and activity levels remain unclear, though the breadth of their reported victim base suggests ongoing operations as of recent observations. The group has been linked to 53 public disclosures across our corpus. First observed on a leak site on September 26, 2023. The operation is currently inactive.

Also tracked as: LOST TRUST.

Timeline of this disclosure

September 26, 2023Cullum Services listed by Losttruston the group's public leak site

Other recent disclosures by Losttrust

Losttrust has been linked to 53 public victims on Darkfield. A sample of the most recent:

See the full Losttrust dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Cullum Services is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Losttrust means Cullum Services 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 Losttrust'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.