Alpha2 Alphanumeric Mixedcase Encoder
Encodes payloads as alphanumeric mixedcase text. This encoder uses SkyLined's Alpha2 encoding suite. A pure alpha encoder is impossible without having a register that points at or near the shellcode. In a default configuration the first few bytes at the beginning are an fnstenv getpc stub (the same as used in shikata_ga_nai) and thus are not alphanumeric. You can set BufferRegister for full alpha (see Encoder options for details).
- pusscat <pusscat [at] metasploit.com>
- skylined <skylined [at] edup.tudelft.nl>
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use encoder/x86/alpha_mixed msf encoder(alpha_mixed) > show options ...show and set options... msf encoder(alpha_mixed) > run