Torrents and "patched" installers are primary vectors for malware, ransomware, and trojans. Since audio plugins require deep system integration, a malicious file can easily gain administrative access to your machine.
Historically, UAD-2 plugins required SHARC DSP hardware (like an Apollo interface or Satellite) to run. Patched versions claim to "unlock" these DSP-bound plugins to run natively on your computer's CPU. uad plugins torrents patched