alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.Win32.Agent.bwr CnC Beacon"; flow:established,to_server; content:"?m="; nocase; http_uri; content:"&a="; nocase; http_uri; content:"&hdd="; nocase; http_uri; content:"&os="; nocase; http_uri; classtype:command-and-control; sid:2006377; rev:6; metadata:attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)