alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Malleable C2 Webbug Profile"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"_utm.gif?utmac="; fast_pattern; content:"&utmcn="; distance:0; content:"&utmcs="; distance:0; content:"&utmsr="; distance:0; content:"&utmsc="; distance:0; content:"&utmul="; distance:0; http.host; content:!"www.google-analytics.com"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,dc65cbf12622eb55f0fd382e0fe250c5; classtype:command-and-control; sid:2032748; rev:5; metadata:attack_target Client_Endpoint, created_at 2017_04_27, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2020_11_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)