alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE lu0bot Loader HTTP Request M3"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?"; pcre:"/^[a-f0-9=]{5,12}&ap=/R"; content:"&ap=|20|Mozilla/4.0|20|"; fast_pattern; http.user_agent; content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|Win32|3b 20|WinHttp|2e|WinHttpRequest|2e|5|29|"; bsize:57; reference:url,twitter.com/benkow_/status/1469238517066838018; reference:md5,8e343598ba830d20ffc22d2a9c82ad5a; classtype:command-and-control; sid:2034738; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_12_15, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_15;)