Here's a little explanation:
The V1 method simply loaded the SWF and scanned it for loaders.
The V2 method (which I didn't finish because I discovered the superior V3 method while working on it) functioned by overriding the Loader class in a loaded SWF. some of you may have realized by now that Adobe classes cannot normally be overrided, but with a little black magic, you can do the equivalent.
The V3 method works by using the debug version of flash player and editing mm.cfg to load the SWF alongside the target SWF, and a little black magic.
The V3 method is much harder to detect and defend against than the V1 and V2 methods and less buggy since it doesn't utilize the Loader class to load the game.
Download and install the flash content debug player on this page
Download this SWF (it's also on the downloads page) and move it to:
open (or create and open if it doesn't exist):
in notepad or equivalent and add the line:
to your mm.cfg file.
A helpful hint if you start getting annoyed with all the errors is to add the following line to your mm.cfg
and then use the "silent" mode (which I will mention later).
Once Manatee SWF Decrypter has been installed, it will be automatically injected into any game running in the debug player. So, to use it you just open the game in the debug player you installed. (eg, if you install the Firefox debug plugin, open the game in Firefox to inject the decrypter into it)
Manatee SWF Decrypter V3 is controlled entirely with the numpad.
There are two output modes: normal mode and the slightly ironically named silent mode.
Normal mode outputs messages by throwing errors, and silent mode outputs messages by beeping.
Numpad 1 enters silent mode, and numpad 2 enters normal mode.
Numpad 5 is a kind of "hello world" button that in normal mode simply tells you that the decryptor is connected. In silent mode, a single "beep" shows that the decryptor is connected.
Numpad 3 tells you if there's remaining SWFs to be dumped. in normal mode it throws an error telling you exactly how many SWFs are left for dumping. in silent mode, 3 beeps means 1 or more SWFs remaining, and 9 beeps means there are no SWFs remaining.
Numpad 0 dumps remaining SWFs. In normal mode, it tells you how many SWFs are remaining when the SWF finishes saving. In silent mode when the SWF has finished dumping you get 3 beeps if one or more SWF is remaining to be dumped or 9 beeps if no SWFs remain to be dumped.
Rule of thumb for silent mode:
1 beep = the decryptor is connected
3 beeps = 1+ SWFs remaining
9 beeps = 0 SWFs remaining
Currently, the only major bug is sometimes the AVM2 garbage collector destroys the ByteArray the SWF is held in before you get a chance to dump it.
It doesn't usually happen to "important" SWFs though, so fixing that bug is pretty low priority for me.