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doneff.com

Claimed by Threeam · listed 2 years ago

29m
Age
since listed · data leaked

Status timeline

  1. ListedFeb 21, 2024
  2. Data leakeddate unknown

At a glance

Group
Threeam
Status
Data leaked
Country
United States
Sector
Agriculture and Food Production
Listed on leak site
Feb 21, 2024

About the victim

AI dossier — public-source company profile

Doneff Companies LLC is a residential real estate developer and property manager based in Manitowoc, Wisconsin. The company builds and manages over 1,056 apartment homes across central and eastern Wisconsin, offering properties ranging from luxury apartments and active adult housing to affordable family housing.

Industry
Real Estate & Property Management
Address
5160 Expo Drive Suite 100, Manitowoc, WI 54220, United States

Attack summary

Severity: low — No proof files, screenshots, or specific data inventory are advertised. The disclosure is a bare listing with no operational impact stated and no confirmed data exfiltration details provided.

The Threeam group claims to have attacked Doneff Companies LLC. The leak post provides no specific details about what data was allegedly exfiltrated or whether encryption occurred.

low

Data the group says was taken

AI dossier — extracted from the leak post
  • tenant records
  • rental applications
  • screening criteria
  • resident information

What the group claims

From luxury apartments and exclusive active adult housing to affordable, moderate family living, Doneff Companies LLC has built and manages more than 1,056 apartment homes across central and eastern Wisconsin.

Sources

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 Threeam

Threeam is a financially motivated ransomware group that emerged in September 2023, operating as a relatively new player in the ransomware ecosystem with 64 documented victims across multiple countries and sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from major security agencies, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing. Based on available victim data, Threeam appears to employ common initial access vectors targeting organizations across business services, healthcare, manufacturing, and technology sectors, with the United States, United Kingdom, Australia, France, and Brazil representing their primary geographic focus areas. While specific technical details about their encryption methods and extortion tactics have not been extensively documented by major threat intelligence firms, their emergence in late 2023 and victim count suggests they have established operational capabilities within the competitive ransomware landscape. The group's current operational status remains active based on the recency of their emergence, though detailed law enforcement actions or disruption efforts have not been publicly reported by CISA, FBI, or other major security organizations. The group has been linked to 88 public disclosures across our corpus. First observed on a leak site on September 14, 2023; most recent post July 18, 2026. The operation is currently inactive.

Timeline of this disclosure

  • February 21, 2024doneff.com listed by Threeamon the group's public leak site

Other recent disclosures by Threeam

Threeam has been linked to 88 public victims on Darkfield. A sample of the most recent:

See the full Threeam dossier →

Sector and geography

This disclosure adds to ransomware activity in the Agriculture and Food Production sector, which has 774 disclosures indexed across all operators we track. Geographically, doneff.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Threeam means doneff.com 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 Threeam'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.