The PaperCut NG Suspicious Behavior Debug Log rule is designed to identify potential exploitation attempts on PaperCut NG servers by parsing and analyzing debug log data. The focus of this rule is on unauthorized or suspicious access attempts from public IP addresses attempting to interact with specific URIs that are known to be associated with vulnerabilities. By leveraging regex expressions to scrutinize unstructured log entries, the detection primarily targets admin login activities. Successful exploitation attempts could lead to unauthorized access, resulting in possible data breaches or further compromise of the server. This detection is particularly relevant in environments where PaperCut NG is deployed, given the active threats against its vulnerabilities. The analysis produced by this rule includes indicators such as matched URIs and IP addresses, specifically filtering out private IP addresses to reduce noise in the alerts. It provides a significant security measure by helping administrators identify and respond promptly to potential threats targeting their PaperCut NG infrastructure.