ClickFix on Steam forums: how malicious PowerShell commands install a crypto miner | Kaspersky official blog
Scammers are posting fake error fixes on Steam forum pages that trick people into copying and running commands on their computers. If followed, these steps can secretly install software that uses the victim’s device to generate digital currency, slowing it down and putting personal information at risk.
Who is at risk
Steam users and gamers who visit forum posts for troubleshooting help and follow instructions from unverified accounts are most at risk.
What to watch for
Be cautious of forum posts that tell you to open system tools, paste in long commands, disable protections, or run a fix outside of normal Steam settings.
What to do
Do not copy or run commands from forum posts, close the page, run a full security scan on your device, and change important passwords if you already followed the instructions.