Industrial Steam listed on RansomHouse leak site

• Ransomware group: RansomHouse
• Country: United States
• Sector: Manufacturing
• Announcement date: December 1, 2025

RansomHouse claims data exfiltration against Industrial Steam

The RansomHouse ransomware group has officially listed the manufacturing company Industrial Steam on its dedicated leak site. In the announcement, the threat actor group claims to have successfully conducted a cyberattack against the organization and asserts that they have exfiltrated sensitive data from the company's systems.

According to the claims made by the threat actor, the attack occurred around November 16, 2025. The group has publicly accused the company's IT department of attempting to conceal the incident from stakeholders. In their announcement, RansomHouse has called upon the management of Industrial Steam to establish contact to resolve the situation. The group has threatened to leak confidential information and various project documents if their specific demands are not met by the organization.

Alleged scope of the data breach

While the threat actor group has confirmed that a breach has occurred, they have not provided a detailed list regarding the specific scope or the exact types of the leaked data. The announcement mentions that confidential data and project documents are involved, but no specific file counts or data sizes have been disclosed by the group.

The items identified as being potentially affected in this claim include:

• Project documents
• Confidential corporate data

It is important to note that the group has not provided any specific information regarding the total volume of data stolen or the specific nature of the files, leaving the full extent of the potential exposure unknown at this time.

About Industrial Steam

Industrial Steam is a manufacturing company that has been producing pressurized and atmospheric deaerators, blowdown systems, and condensate recovery units for the boiler industry since 1952. The company specializes in boiler feedwater systems and innovative deaerator designs.

Analysis and industry implications

This incident highlights a significant risk of exposure for sensitive business information and intellectual property within Industrial Steam. Given the focus of the RansomHouse group on data exfiltration and extortion, the company may face negative impacts on its operational processes and customer trust. Because the organization is based in the United States, the incident may require evaluation under state-level data breach notification laws and potential regulatory requirements.

Furthermore, there is a possibility that the leaked data could be used for secondary attacks or targeted phishing campaigns against the company or its partners. The methods used by RansomHouse, a group that has been active since 2021, may also pose indirect risks to the company's supply chain partners. In such scenarios, organizations often face the challenge of