“I first noticed something was wrong when games I played dropped frames dramatically... I found out it is a bitcoin miner that uses your GPU which explains my game lag.” Reddit · r/Steam · 10 years ago
Historically, miners and trojans have used names like "Steam.exe" or variations to hide in plain sight while using system resources. Steam 2.exe
If you have discovered a file named on your computer, you should treat it with caution. The legitimate Steam client executable is always named steam.exe . While "Steam 2.exe" might sometimes be created by Windows when a duplicate file is moved or copied, it is frequently used as a disguise for malware. Is it a Virus? “I first noticed something was wrong when games
Malware often uses names very similar to legitimate processes to avoid detection. The legitimate Steam client executable is always named steam