Trojan builders focus on creating hidden malware with downloader and encryption capabilities. Assembly changers and mutex features ensure uniqueness, while RAT clients provide remote access to infected systems.

Hidden malware uses techniques like UAC bypass and antivirus bypass to avoid detection. Crypters and shellcode loaders help deploy FUD payloads, while memory exclusion ensures smooth execution without interference.

RAT tools and malware builders generate trojan clients with hidden startup and encryption. Features like assembly changers and mutex improve stealth, while downloader modules ensure additional payloads are fetched securely.

Malware builders create hidden trojans with features like UAC bypass and defender bypass. Tools like crypters and FUD ensure antivirus evasion, while shellcode and memory exclusion enhance stealth.