alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Reconnaissance Related UA"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0|20 28|Windows NT 6.1|3b 20|WOW64|3b 20|rv|3a|68.0|29 09 09 09 20 20 20 20|Gecko/20100101|20|Firefox/68.0"; fast_pattern; reference:url,www.cisa.gov/news-events/cybersecurity-advisories/aa23-144a; classtype:misc-activity; sid:2047994; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_09_11, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_11, reviewed_at 2023_09_11;)