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Full Discussion: Shellcode Generation using C
Top Forums Programming Shellcode Generation using C Post 302139532 by Legend986 on Monday 8th of October 2007 01:25:54 AM
Old 10-08-2007
And thats where the fun begins? Smilie That was a great explanation. Thank you... I was actually trying to spawn a shell after reading a couple of articles but somehow couldn't properly understand Shellcode generation because most of the online articles say "To keep this article simple, I'd skip shellcode generation" and that was the instant when I thought of going for simple things - To generate one for atleast Hello World... Its funny that I got a shellcode itself for "Hello World" generation but I'm not searching for the answer instead the solution...
 

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RAGG2-CC(1)						    BSD General Commands Manual 					       RAGG2-CC(1)

NAME
ragg2-cc -- CC frontend for compiling shellcodes SYNOPSIS
ragg2-cc [-a arch] [-b bits] [-k kernel] [-o file] [-dscxvh] DESCRIPTION
ragg2-cc is a frontend of CC. It is used to creates tiny binaries (1KB) or shellcodes in binary or hexpairs from a C source. The compiler used is the one configured by the CC environment. This has been tested with gcc, llvm-gcc and clang. Uses sflib (shellforge4) includes to get the syscall definitions. Only linux/darwin x86-32/64 is supported at the moment. Planned support for more architectures. OPTIONS
-a arch set architecture x86, arm -b bits 32 or 64 -k kernel windows, linux or osx -o file output file to write result of compilation -h show help message -v show version -d show assembler code -s generate assembly file -c generate compiled shellcode -x show hexpair bytes EXAMPLE
$ cat hi.c int main() { write (1, "Hello World ", 12); exit (0); } $ ragg2-cc hi.c hi.c.bin # Linked into a tiny binary. This is 294 bytes $ wc -c < hi.c.bin 294 $ ./hi.c.bin Hello World # The compiled shellcode has zeroes $ ragg2-cc -x hi.c e90000000083ec0ce800000000588d882a000000b804000000606a0651 6a0150cd8083c41061b8010000006a0050cd8083c40883c40cc368656c 6c6f0a00 # Use a xor encoder with key 32 to bypass $ ragg2 -e xor -c key=32 -B `ragg2-cc -x hi.c` 6a3e596a205be8ffffffffc15e4883c60d301e48ffc6e2f9c920202020 a3cc2cc82020202078ada80a2020209824202020404a26714a2170eda0 a3e4304198212020204a2070eda0a3e428a3e42ce348454c4c4f2a20 SEE ALSO
radare2(1), rahash2(1), rafind2(1), rabin2(1), rafind2(1), ranal2(1), radiff2(1), rasm2(1), ragg2cc(1), AUTHORS
pancake <pancake@nopcode.org> BSD
Dec 5, 2011 BSD
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