A DoS password cracking method

Stack segment
Cache dB 10 DUP ('? ')
Stack ends

Code segment
Assume Cs: code, DS: code, ES: code, SS: Stack
Message dB 'made by correy ', 24 h
Email dB 0dh, 0ah, 'email: leguanyuan@126.com ', 24 h
Notice dB 0dh, 0ah, 'input password: ', 24 h
Password dB 'correy999'
Main proc
MoV ax, code
MoV ds, ax
MoV es, ax
MoV ax, stack
MoV SS, ax
MoV dx, offset message
MoV ah, 09
Int 21 h
MoV dx, offset email
MoV ah, 09
Int 21 h
Start: mov dx, offset notice
MoV ah, 09
Int 21 h
MoV CX, 9
MoV BX, offset Cache
Show: mov ah, 00
Int 16 h
CMP Al, 0dh
Je comp
MoV [BX], Al
INC BX
MoV DL, 2ah
MoV ah, 02
Int 21 h
Loop show
Comp: mov CX, 9
MoV Si, offset Password
MoV Di, offset Cache
Repz cmpsb
JNE start
MoV ah, 4ch
Int 21 h
Main endp
Code ends
End main