Smoke Loader malware improves after Microsoft spoils its Campaign

**Smoke Loader analysis:** This report documents technical changes in Smoke Loader, including a move from simple XOR encoding to RC4 and a more complex multi-operation decoding routine, describes C2 packet formats and RC4-encrypted responses carrying plugins (with commands such as download, uninstall, update), provides IDA Python and C examples for decoding and creating a mutex-based 'vaccine', and notes debug variables that indicate ongoing active development.