Skip to content
Permalink
master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time

The shellcode on the back of NSA Codebreaker Challenge medallion

medallion

$ cat nsa_shellcode.c 
char code[] = "\xeb\x32\x5b\x48\x89\xda\xb9\x1a\x00\x00\x00\x80\x33\xaa\x48\xff\xc3\x48\xff\xc9\x75\xf5\xb8\x01\x00\x00\x00\xbf\x01\x00\x00\x00\x48\x89\xd6\xba\x1a\x00\x00\x00\x0f\x05\xb8\x3c\x00\x00\x00\x48\x31\xff\x0f\x05\xe8\xc9\xff\xff\xff\xe4\xf9\xeb\x8a\xe9\xc5\xce\xcf\xc8\xd8\xcf\xcb\xc1\xcf\xd8\x8a\xe9\xc2\xcb\xc6\xc6\xcf\xc4\xcd\xcf\xa0";

int main(int argc, char **argv)
{
  int (*func)();
  func = (int (*)()) code;
  (int)(*func)();
}

$ gcc -z execstack -o nsa_shellcode nsa_shellcode.c

$ ./nsa_shellcode
NSA Codebreaker Challenge