Gamers beware: malicious wallpapers on Steam found stealing accounts

# Summary Since late 2025, malicious wallpapers distributed through Steam Workshop have been stealing gaming accounts, primarily targeting users in China and Russia by exploiting Wallpaper Engine's "application wallpapers" feature, which allows arbitrary code execution. The malware is hidden within wallpaper packages that appear harmless when launched but can hijack Steam accounts or infect systems with backdoors and crypto miners. The discovery revealed dozens of compromised wallpapers, some downloaded tens of thousands of times, using techniques like hiding malware in password-protected archives or embedding it alongside legitimate wallpaper executables.