This rule is designed to detect suspicious network events related to the APT (Advanced Package Tool) package manager on Linux systems, which may signal the presence of a backdoor installed by an adversary for persistence. The APT package manager is integral for managing software on Debian-based systems, and attackers can compromise it by injecting malicious code into scripts that APT executes. The rule utilizes Elastic Query Language (EQL) to identify a sequence: it first checks if a shell execution is initiated by the APT process, followed within a short timeframe by any network connection attempts that are not targeting local or private IPs or related to expected operations like "/usr/bin/apt-listbugs". This detection aims to identify potential malicious activities that leverage APT for unauthorized access or commands, highlighting their potential evasion tactics and signaling the need for further investigation.