There is no standard or common use of this port.
UDP port 139 is associated with NetBIOS services, which are often targeted by hackers due to their widespread use in corporate networks. In the past, hackers have exploited this port to perform Denial of Service (DoS) attacks, causing the targeted system to crash or become unresponsive. They have also used it to spread malware or worms across the network. Additionally, hackers have exploited vulnerabilities in the NetBIOS protocol to gain unauthorized access to systems and steal sensitive data. In some cases, they have even managed to take full control of the system. Therefore, it's crucial to secure this port and monitor it for any suspicious activities.
