-
-
Notifications
You must be signed in to change notification settings - Fork 198
/
Copy pathno_dep.asm
114 lines (93 loc) · 3.33 KB
/
no_dep.asm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
; a PE executing code on the stack successfully with no DEP
; Ange Albertini, BSD LICENCE 2013
%include 'consts.inc'
IMAGEBASE equ 400000h
org IMAGEBASE
bits 32
SECTIONALIGN equ 1000h
FILEALIGN equ 200h
istruc IMAGE_DOS_HEADER
at IMAGE_DOS_HEADER.e_magic, db 'MZ'
at IMAGE_DOS_HEADER.e_lfanew, dd NT_Headers - IMAGEBASE
iend
NT_Headers:
istruc IMAGE_NT_HEADERS
at IMAGE_NT_HEADERS.Signature, db 'PE', 0, 0
iend
istruc IMAGE_FILE_HEADER
at IMAGE_FILE_HEADER.Machine, dw IMAGE_FILE_MACHINE_I386
at IMAGE_FILE_HEADER.NumberOfSections, dw NUMBEROFSECTIONS
at IMAGE_FILE_HEADER.SizeOfOptionalHeader, dw SIZEOFOPTIONALHEADER
at IMAGE_FILE_HEADER.Characteristics, dw IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_32BIT_MACHINE
iend
OptionalHeader:
istruc IMAGE_OPTIONAL_HEADER32
at IMAGE_OPTIONAL_HEADER32.Magic, dw IMAGE_NT_OPTIONAL_HDR32_MAGIC
at IMAGE_OPTIONAL_HEADER32.AddressOfEntryPoint, dd EntryPoint - IMAGEBASE
at IMAGE_OPTIONAL_HEADER32.ImageBase, dd IMAGEBASE
at IMAGE_OPTIONAL_HEADER32.SectionAlignment, dd SECTIONALIGN
at IMAGE_OPTIONAL_HEADER32.FileAlignment, dd FILEALIGN
at IMAGE_OPTIONAL_HEADER32.MajorSubsystemVersion, dw 4
at IMAGE_OPTIONAL_HEADER32.SizeOfImage, dd 2 * SECTIONALIGN
at IMAGE_OPTIONAL_HEADER32.SizeOfHeaders, dd SIZEOFHEADERS
at IMAGE_OPTIONAL_HEADER32.Subsystem, dw IMAGE_SUBSYSTEM_WINDOWS_CUI
at IMAGE_OPTIONAL_HEADER32.DllCharacteristics, dw 0 ; <== just making sure
at IMAGE_OPTIONAL_HEADER32.NumberOfRvaAndSizes, dd 16
iend
%include 'dd_imports.inc'
%include 'section_1fa.inc'
;*******************************************************************************
pop_eax_ equ 058h
retn_ equ 0c3h
nop_ equ 090h
EntryPoint:
push Handler
push dword [fs:0]
mov [fs:0], esp
_
push next
push ((((retn_ << 8 | pop_eax_) << 8) | nop_) << 8) | nop_
call esp
int3
Handler
push Msg
call [__imp__printf]
add esp, 1 * 4
_
next:
push 0
call [__imp__ExitProcess]
_c
Msg db " * executing code on the stack successfully with no DEP", 0ah, 0
_d
Import_Descriptor: ;************************************************************
istruc IMAGE_IMPORT_DESCRIPTOR
at IMAGE_IMPORT_DESCRIPTOR.OriginalFirstThunk, dd kernel32.dll_hintnames - IMAGEBASE
at IMAGE_IMPORT_DESCRIPTOR.Name1, dd kernel32.dll - IMAGEBASE
at IMAGE_IMPORT_DESCRIPTOR.FirstThunk, dd kernel32.dll_iat - IMAGEBASE
iend
istruc IMAGE_IMPORT_DESCRIPTOR
at IMAGE_IMPORT_DESCRIPTOR.OriginalFirstThunk, dd msvcrt.dll_hintnames - IMAGEBASE
at IMAGE_IMPORT_DESCRIPTOR.Name1, dd msvcrt.dll - IMAGEBASE
at IMAGE_IMPORT_DESCRIPTOR.FirstThunk, dd msvcrt.dll_iat - IMAGEBASE
iend
istruc IMAGE_IMPORT_DESCRIPTOR
iend
_d
kernel32.dll_hintnames dd hnExitProcess - IMAGEBASE, 0
msvcrt.dll_hintnames dd hnprintf - IMAGEBASE, 0
_d
hnExitProcess db 0,0, 'ExitProcess', 0
hnprintf db 0,0, 'printf', 0
_d
kernel32.dll_iat:
__imp__ExitProcess dd hnExitProcess - IMAGEBASE
dd 0
msvcrt.dll_iat:
__imp__printf dd hnprintf - IMAGEBASE
dd 0
_d
kernel32.dll db 'kernel32.dll', 0
msvcrt.dll db 'msvcrt.dll', 0
_d
align FILEALIGN, db 0