The detection rule targets a specific vulnerability identified as CVE-2021-4034, which is a memory corruption issue in the polkit's pkexec program, a SUID-root tool present by default across major Linux distributions. This rule aims to identify potential exploitation attempts correlated with the execution of proof-of-concept (PoC) exploits for this CVE. Detection logic focuses on event correlation from Linux audit logs specifically looking for syscall events related to 'pkexec', indicating possible abuse of the privilege escalation mechanisms. This aligns with techniques such as T1548.001, which involves exploiting setuid and setgid used for elevation control, and T1068, associated with exploiting local privilege escalation vulnerabilities. It’s important for defenders to correlate these events to preemptively mitigate attacks linked to this identified threat, which has been associated with the Lazarus group, a known threat actor.