Illegal Steam Clients & Multiplayer Game Cheats
Since illegal Steam clients are no longer working, and with the effectiveness of VAC, keyloggers and trojans designed to steal Steam Account information have been added to these applications.
Method
1) Applications that claim to provide free VALVe games usually contain keyloggers and trojans that steal your
personal information.
2) Working multiplayer game cheats that may claim to be "VAC Proof" usually contain keyloggers and trojans that steal your
personal information.
Response
Besides the obvious issue of someone stealing your personal information, use of these applications is in breach of the
Steam Subscriber Agreement - you are also at risk of having your Steam Account disabled or VAC banned:
Steam Account Disabled
Valve Anti-Cheat System (VAC)
Action
Uninstall any of these applications and read the following FAQs:
Spyware, Adware, and Viruses Interfering with Steam
Reclaiming a Hijacked Steam Account
Contacting VALVe Billing and Support
Account Security Recommendations