How to write shellcode in c?

Question

i try to write shell code in file using c , but after execute the program i found the ASCII code not shell code in the file . this is the code :

FILE *shell;
    shell = fopen("shell.txt", "w");
    fprintf(shell,"shell = '\xbd\x7f\x94' \n");
    fclose(shell);

What would you expect your file to contain, if not what you put in it? — Thierry Lathuille, Jul 21 '19 at 14:37

score 1 · Answer 1 · answered Jul 21 '19 at 14:49

1

In C to print a backslash you need to escape it, as it is the escape character.

So to print

shell = '\xbd\x7f\x94' <LF>

specify

"shell = '\\xbd\\x7f\\x94' \n"

instead.

answered Jul 21 '19 at 14:49

alk

1 Answers1