alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP RelevantKnowledge Adware CnC Beacon"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"&os="; content:"&osmajorver="; distance:0; content:"&osminorver="; distance:0; content:"&osmajorsp="; distance:0; content:"&lang="; distance:0; content:"&country="; distance:0; content:"&ossname="; distance:0; content:"&brand="; distance:0; content:"&bits="; distance:0; http.header_names; to_lowercase; content:"|0d 0a|x-ossproxy|0d 0a|"; fast_pattern; reference:md5,d93b888e08693119a1b0dd3983b8d1ec; classtype:command-and-control; sid:2018174; rev:7; metadata:attack_target Client_Endpoint, created_at 2014_02_26, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_04_21, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)