Keygenning4newbies CrackMe 1 coded by tHE ANALYST

int_0x80_: iop
xylitol: o/
int_0x80_: dis, je commence tout juste le reverse sous windows
int_0x80_: je tente un crack me niveau facile
int_0x80_: tu peux m'aider / me guider ?
xylitol: heu wai si tu veut
int_0x80_: d'accord
int_0x80_: voilà celui que j'ia dl
int_0x80_: http://users.skynet.be/crisanar/defis/The_Analyst_k4n1.rar

et c'est parti.

routinz:

0040110C  |>  /0FBE840D 48FF>  /MOVSX EAX,BYTE PTR SS:[EBP+ECX-B8]
00401114  |.  |41              |INC ECX
00401115  |.  |33C1            |XOR EAX,ECX
00401117  |.  |03D8            |ADD EBX,EAX
00401119  |.  |3B4D D8         |CMP ECX,DWORD PTR SS:[EBP-28]
0040111C  |. ^\75 EE           \JNZ SHORT 0040110C
0040111E  |.   6BC0 06         IMUL EAX,EAX,6
00401121  |.   C1E3 07         SHL EBX,7
00401124  |.   03C3            ADD EAX,EBX

bref pas bien compliqué, je te laisse cogiter sur les instructions

.asm:

.486
.model  flat, stdcall
option  casemap :none   ; case sensitive

include     base.inc

.data
format db "%X",0

.data?
szInput db 256 dup(?)
szOutput db 256 dup(?)

.code
start:
    invoke  GetModuleHandle, NULL
    mov hInstance, eax
    invoke  DialogBoxParam, hInstance, 101, 0, ADDR DlgProc, 0
    invoke  ExitProcess, eax
; -----------------------------------------------------------------------
DlgProc proc    hWin    :DWORD,
        uMsg    :DWORD,
        wParam  :DWORD,
        lParam  :DWORD
    .if uMsg == WM_COMMAND
        .if wParam == IDC_OK
; -----------------------------------------------------------------------
invoke GetDlgItemText,hWin,1001,addr szInput,sizeof szInput
MOV ESI,EAX
lea EDX,szInput
XOR ECX,ECX
L000:
  MOV AL,BYTE PTR DS:[EDX]
  INC ECX
  XOR EAX,ECX
  ADD EBX,EAX
  INC EDX
  CMP ECX,ESI
  JNZ L000
@end:
IMUL EAX,EAX,6
SHL EBX,7
ADD EAX,EBX
invoke wsprintf,addr szOutput,addr format,eax
invoke SetDlgItemText,hWin,1002,addr szOutput
; -----------------------------------------------------------------------
        .elseif wParam == IDC_IDCANCEL
            invoke EndDialog,hWin,0
        .endif
    .elseif uMsg == WM_CLOSE
        invoke  EndDialog,hWin,0
    .endif
    xor eax,eax
    ret
DlgProc endp
end start

.inc:

include windows.inc
uselib  MACRO   libname
    include     libname.inc
    includelib  libname.lib

ENDM
uselib  user32
uselib  kernel32

DlgProc     PROTO :DWORD,:DWORD,:DWORD,:DWORD

IDC_OK          equ 1003
IDC_IDCANCEL    equ 1004

.data?
hInstance       dd      ?   ;dd can be written as dword

.rc:

;This Resource Script was generated by WinAsm Studio.

#define IDC_OK 1003
#define IDC_CANCEL 1004
#define IDC_STATIC1006 1006
#define IDC_STATIC1007 1007
#define IDC_STATIC1008 1008
101 DIALOGEX 0,0,157,54
CAPTION "k4n #1 by tHE ANALYST *Keygen*"
FONT 8,"Tahoma"
STYLE 0x80c80880
EXSTYLE 0x00000008
BEGIN
    CONTROL "Generate",IDC_OK,"Button",0x10000001,77,37,50,14,0x00000000
    CONTROL "Close",IDC_CANCEL,"Button",0x10000000,130,37,24,14,0x00000000
    CONTROL "Xylitol",1001,"Edit",0x10000080,30,3,124,12,0x00000200
    CONTROL "",1002,"Edit",0x10000880,30,22,124,12,0x00000200
    CONTROL "Name:",IDC_STATIC1006,"Static",0x50000000,3,3,24,10,0x00000000
    CONTROL "Serial:",IDC_STATIC1007,"Static",0x50000000,3,22,24,10,0x00000000
    CONTROL "21/09/2010",IDC_STATIC1008,"Static",0x58000000,0,46,47,10,0x00000000
END

Code toi un keygen en C :)