ClickFix Abuse Turns Siemens Tool Into RAT Delivery

The Hacker News · High sophistication
Last updated October 20, 2026

Attackers abused a trusted, signed Siemens Software Center program to run malicious code and install a remote access trojan. Victims were directed to a fake web address containing a ClickFix lure, where copying and running the displayed content launched PowerShell and an installer that exploited the Siemens software flaw.

Key findings

  • Attackers exploited CVE-2026-110936, a DLL sideloading issue in Siemens Software Center, to execute malicious code through a trusted signed application.
  • Campaigns used malicious ChatGPT Custom GPTs to send victims to a fake URL hosting a ClickFix lure.
  • When victims copied and executed the ClickFix content, PowerShell dropped an MSI installer that launched SiemensSoftwareCenter.exe alongside a malicious archive.dll file.
  • The activity was attributed to the Romulus ClickFix delivery platform and was associated with Legion Loader and other malware delivery activity.
  • Siemens advised updating Software Center to version 4.0.9.8 or later and investigating SiemensSoftwareCenter.exe launched from AppData\Local\Programs by msiexec.exe.

Who’s being targeted

  • Commonly targeted roles: Employees using Siemens Software Center, Engineering teams, Industrial operations staff, Manufacturing IT teams, Help desk and desktop support teams.
  • Affected industries: Manufacturing, Industrial automation, Engineering, Organizations using Siemens Software Center.
  • Attack channels: website.
  • Impersonated: Not specified in the article; a fake URL hosts the ClickFix lure..

Awareness takeaways

  • Do not copy and run commands, scripts, or text from a web page or AI assistant unless the request has been independently verified through an approved support channel.
  • Treat unexpected links from AI tools, search results, or web pages as untrusted, especially when they lead to a page requesting software installation or command execution.
  • Keep Siemens Software Center updated and report or investigate unexpected installer activity involving SiemensSoftwareCenter.exe.
  • Do not assume a signed or familiar application is safe when it is launched from an unusual folder or alongside unexpected files.

Red flags to watch for

  • A Custom GPT or web page directs the user to an unfamiliar or fake URL.
  • The page asks the user to copy and run commands or text.
  • A supposedly routine action requires running PowerShell or an installer.
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Read the video transcript

A ChatGPT Custom GPT sends you to a link. The page says: “Copy and execute.” That’s ClickFix. Running the text starts PowerShell, which downloads an MSI installer. It launches Siemens Software Center beside a malicious file called archive.dll. Here’s the trap: SiemensSoftwareCenter.exe is genuinely signed. But the installer uses a DLL sideloading flaw to run archive.dll and deliver a remote access trojan. If a page or AI assistant tells you to run text, don’t. Check the request with approved support first.

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