Yes, you can just use strstr for this:
#include
#include
char buff[1000];
char *s;
s = strstr(buff, "hassasin"); // search for string "hassasin" in buff
if (s != NULL) // if successful then s now points at "hassasin"
{
printf("Found string at index = %d\n", s - buff);
} // index of "hassasin" in buff can be found by pointer subtraction
else
{
printf("String not found\n"); // `strstr` returns NULL if search string not found
}