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The slang for the tools you're looking for is "crypters". Those tool are "compiling" your code using various techniques to the so called obfuscated code, there's no single solution and every tool may select its own weird way to obfuscate the binary. As for other "dark" subjects practical explanations about those techniques are quite rare (have you ever ...


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About the script The code is obvious malicious script written in PHP for sending spams and other illegal activities. This script actually is very easy to decode by changing eval to echo and executing it will print the well formatted source code. The reason why the authors of that exploit spent so much time on securing this code via transposition array ...


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That's a remote command shell for a server that's probably been hacked, and you should consider the server compromised. You would be wise to suspend everything it hosts, audit all code on the machine and rebuild it / replace it. Remote users who probably control this script can force it to issue any command by posting "CODE" that's base64_encoded (that sent ...


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This file employs similar tactics to obfuscate the payload. The variable names and indentation changed, and its actions become very clear: <?php $char_transposition_map = Array('1'=>'N', '0'=>'S', '3'=>'O', '2'=>'8', '5'=>'v', '4'=>'3', '7'=>'H', '6'=>'n', '9'=>'W', '8'=>'u', 'A'=>'C', 'C'=>'f', 'B'=>'9', ...


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The last line performs an eval() of function v78ZFAX() given the two parameters like so: eval(v78ZFAX($vFHLJ89, $vIIJ30Y)); That first parameter is the part that takes up the bulk of the code. It is assigned all that random-looking garbage, with . concatenating all those strings together into one long string: $vFHLJ89 = ...


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You've answered the question yourself. You're trying to implement DRM to prevent users from getting the video off the device. In practice there is little you can do to prevent this. There will always be ways to copy the stream, even intercepting the stream (it has to be displayed on the device at some point right?). So the only thing you can do is make it ...



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