Sample viewer

vx.netlux.org/Virus.DOS.Doomsday.733

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:51:38.868987595Z 26 PC: 12f6f | Set disk transfer address
2018-12-17T22:51:38.871425159Z 78 PC: 12f84 | Find first file
2018-12-17T22:51:38.87923367Z 67 PC: 12ff9 | Get or set file attributes
2018-12-17T22:51:38.885955254Z 67 PC: 13005 | Get or set file attributes
2018-12-17T22:51:38.903710605Z 61 PC: 1300a | Open file (Filename = '\SLEEP.COM')
2018-12-17T22:51:38.912143066Z 63 PC: 13018 | Read file or device (Read 4 bytes on handle 5)
2018-12-17T22:51:38.919389261Z 44 PC: 1301c | Get time 0x1301c: add dl, dh
0x1301e: add dl, cl
0x13020: add dl, 1
0x13023: mov byte ptr [si + 0x2d5], dl
0x13027: xor cx, cx
0x13029: xor dx, dx
0x1302b: mov ax, 0x4200
0x1302e: int 0x21
0x13030: mov cx, 4
0x13033: mov dx, si
0x13035: add dx, 0x2d2
0x13039: mov ah, 0x40
0x1303b: int 0x21
0x1303d: jmp 0x13041
0x1303f: jmp 0x13074
0x13041: mov al, byte ptr [si + 0x2d5]
0x13045: mov cx, 0x241
0x13048: push bx
0x13049: mov bx, cx
0x1304b: add byte ptr [bx + si], al
2018-12-17T22:51:38.921825992Z 66 PC: 13030 | Move file pointer
2018-12-17T22:51:38.924436709Z 64 PC: 1303d | Write file or device (Write 4 bytes on handle 5)
2018-12-17T22:51:38.927544929Z 66 PC: 13059 | Move file pointer
2018-12-17T22:51:38.929200213Z 64 PC: 13066 | Write file or device (Write 592 bytes on handle 5)
2018-12-17T22:51:38.939267495Z 64 PC: 12e4d | Write file or device (Write 141 bytes on handle 5)
2018-12-17T22:51:38.948227865Z 87 PC: 12e5a | Get or set file date and time
2018-12-17T22:51:38.950084874Z 62 PC: 12e5e | Close file
2018-12-17T22:51:38.959138922Z 67 PC: 12e76 | Get or set file attributes
2018-12-17T22:51:38.965165032Z 9 PC: 12d16 | Display string (String= ' ')
2018-12-17T22:51:38.96929246Z 49 PC: 12b50 | Terminate and stay resident (Return code = '0' | Memory size = '29')