The Linux Auditd detection rule titled 'Linux Auditd Data Transfer Size Limits Via Split' is designed to identify anomalies related to the unauthorized transfer of data through the use of the 'split' syscall. This technique can be exploited by attackers to evade size limits set by security protocols, consequently facilitating the covert exfiltration of sensitive data. The analytic monitors any instances where the 'split' command is invoked with specific flags indicating file size manipulation, which may signify an attempt to break large files into smaller, less detectable segments. By flagging these unusual usages, security teams can proactively respond to potential data breaches, thereby protecting critical information from unauthorized access or exfiltration attempts. The rule utilizes data sourced from Linux Auditd logs that capture syscall events and command executions, and must be accurately parsed and normalized to ensure effective tracking and detection of suspicious activities across Unix/Linux systems.