;
;
; u must have soft-ice loaded !!!

.586p
.Model Flat

extrn     ExitProcess     : PROC
extrn     MessageBoxA     : PROC

.Data                                        
caption     db "daemon@I.LOVE.YOU.COM",0
text        db "trace me! -> "

to_decrypt  db "love my feets, sucker",0
to_decrypt_end equ $

.Code
Main:
        lea     eax,handler            ; pointer to my tracer
        push    eax
        push    dword ptr fs:[0]
        mov     dword ptr fs:[0],esp   ; set new exception handler

        int     1                      ; generate an exception
                                       ; for debug register setup

        ;--- set up zero decryptor

        lea     esi,to_decrypt
        mov     edi,esi
        mov     ecx,offset to_decrypt_end - offset to_decrypt

decrypt:db      08dh,0c0h              ; lea eax,eax -> generate exception
        xor     byte ptr [ecx+esi],al
        loop    decrypt

        push    0
        push    offset caption
        push    offset text
        push    0

        call    MessageBoxA
        call    ExitProcess

handler:mov     eax,[esp+04h]                    ; pointer to exception record
        mov     eax,[eax]                        ; get exception code
        xor     ecx,ecx        
        cmp     eax,80000004h                    ; single step ???
        jne     dont_setup_registers
        inc     ecx
dont_setup_registers:
        mov     eax,[esp+0ch]                    ; pointer to context struc
        mov     ebx,[eax+0b8h]
        cmp     ecx,1
        jne     over_me
        lea     edi,[eax+04h]
        xor     eax,eax
        mov     ecx,04h
        repz    stosd                            ; kill debug register dr0-dr3
        ret
over_me:mov     ebx,[eax+010h]                   ; get debug register #3
        mov     [eax+0b0h],ebx                   ; and store it in eax
        add     dword ptr [eax+0b8h],02h         ; update next eip
        xor     eax,eax
        ret                                      ; go back!

End Main                        ;End of code, Main is the entrypoint