Sample viewer

vx.netlux.org/Virus.DOS.Yunk.525

.

GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:49:10.503135851Z 37 PC: 12aee | Set interrupt vector (Interrupt = '36' AKA 'Set random record number')
2018-12-17T22:49:10.509608427Z 71 PC: 12b00 | Get current directory
2018-12-17T22:49:10.518570231Z 26 PC: 12b52 | Set disk transfer address
2018-12-17T22:49:10.519721626Z 78 PC: 12b5e | Find first file
2018-12-17T22:49:10.526379251Z 67 PC: 12c98 | Get or set file attributes
2018-12-17T22:49:10.533270966Z 67 PC: 12c98 | Get or set file attributes
2018-12-17T22:49:10.550871042Z 61 PC: 12b7b | Open file (Filename = 'SLEEP.COM')
2018-12-17T22:49:10.55891222Z 66 PC: 12b88 | Move file pointer
2018-12-17T22:49:10.56110709Z 63 PC: 12c98 | Read file or device (Read 3 bytes on handle 5)
2018-12-17T22:49:10.568099262Z 87 PC: 12bbe | Get or set file date and time
2018-12-17T22:49:10.569479311Z 66 PC: 12bc9 | Move file pointer
2018-12-17T22:49:10.57146338Z 63 PC: 12c98 | Read file or device (Read 3 bytes on handle 5)
2018-12-17T22:49:10.574156127Z 44 PC: 12c67 | Get time 0x12c67: xor ch, dh
0x12c69: mov word ptr [si + 0x15], cx
0x12c6c: xor byte ptr [si + 0xe], cl
0x12c6f: xor word ptr [si + 0xf], cx
0x12c72: ret
0x12c73: mov cx, word ptr [si + 0x15]
0x12c76: jmp 0x12c6c
0x12c78: mov ah, 0x3e
0x12c7a: int 0x21
0x12c7c: mov al, 1
0x12c7e: mov ah, 0x43
0x12c80: mov dx, 0x2d8
0x12c83: jmp 0x12c94
0x12c85: mov ah, 0x3f
0x12c87: mov cx, 3
0x12c8a: mov dx, 0xe
0x12c8d: jmp 0x12c94
0x12c8f: mov ah, 0x3b
0x12c91: mov dx, 2
0x12c94: add dx, si
2018-12-17T22:49:10.576439363Z 66 PC: 12bd8 | Move file pointer
2018-12-17T22:49:10.578753683Z 64 PC: 12be4 | Write file or device (Write 3 bytes on handle 5)
2018-12-17T22:49:10.581578665Z 66 PC: 12bed | Move file pointer
2018-12-17T22:49:10.583284392Z 64 PC: 12c20 | Write file or device (Write 19 bytes on handle 5)
2018-12-17T22:49:10.586070239Z 64 PC: 12c2c | Write file or device (Write 506 bytes on handle 5)
2018-12-17T22:49:10.594809664Z 87 PC: 12c33 | Get or set file date and time
2018-12-17T22:49:10.596395916Z 62 PC: 12c7c | Close file
2018-12-17T22:49:10.604606018Z 67 PC: 12c98 | Get or set file attributes
2018-12-17T22:49:10.615612042Z 59 PC: 12c98 | Change current directory
2018-12-17T22:49:10.620700342Z 59 PC: 12c43 | Change current directory
2018-12-17T22:49:10.622548691Z 26 PC: 12c4a | Set disk transfer address
2018-12-17T22:49:10.624061085Z 37 PC: 12c53 | Set interrupt vector (Interrupt = '36' AKA 'Set random record number')
2018-12-17T22:49:10.625613422Z 9 PC: 12aa2 | Display string (String= 'Hello - This is a 100 COM test file, 1993 ')