Network Enumeration Commands and Internet Connectivity Checks
This rule detects various network enumeration commands commonly used by adversaries for reconnaissance, as identified in the CISA Living off the Land report. It specifically looks for commands like 'arp -a', 'curl www.ip-api.com', 'dnscmd /enumrecords', 'dnscmd /enumzones', 'ipconfig /all', 'netsh' commands related to firewall and portproxy, and 'netstat -ano'. Additionally, it detects DNS queries for 'www.ip-api.com', which can be indicative of C2 frameworks like Covenant attempting to check for internet connectivity or external IP addresses.
YARA-L
