When SMB messages exchange file attribute information, it is encoded in 16 bits as:
| Value ======= |
Description ===================== |
| 0x01 | Read only file |
| 0x02 | Hidden file |
| 0x04 | System file |
| 0x08 | Volume |
| 0x10 | Directory |
| 0x20 | Archive file |
| others | Reserved - must be 0 |