The rule focuses on detecting CUPS (Common UNIX Printing System) traffic on UDP port 631 from external sources that may signify malicious activities related to print services. This type of traffic can be indicative of remote unauthenticated attacks where an attacker seeks to exploit vulnerabilities within CUPS to replace or install printers' IPP (Internet Printing Protocol) URLs with malicious addresses. This could potentially lead to arbitrary command execution on designated computers when a print job is initiated. The rule captures network flows and applies filtering to ensure that only traffic from external sources (non-private IP addresses) to internal IP addresses is analyzed. It employs statistical and regex methods within a Splunk environment to process the data and derive insights, facilitating proactive defense against potential exploits outlined in associated CVEs, namely CVE-2024-47176, CVE-2024-47076, CVE-2024-47175, and CVE-2024-47177.