Indirect Execution via pcalua.exe Proxy
This rule detects HTTP traffic where the URI contains both "pcalua" and "-a" (case-insensitive). This pattern is indicative of indirect execution via pcalua.exe, a legitimate Windows utility that can be abused by attackers to proxy execution of other programs, often for defense evasion. The rule specifically looks for this behavior in HTTP requests, suggesting an attempt to download or execute a payload indirectly.
Suricata
