alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Malleable C2 (QiHoo Profile)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:!"."; http.accept; bsize:85; content:"text/html,application/xhtml+xml,application/xml|3b|q=0.9,image/webp,image/apng,*/*|3b|q=0.8"; content:!"application/signed-exchange"; http.user_agent; bsize:123; content:"Mozilla/5.0 (Linux|3b 20|Android 4.1.1|3b 20|Nexus 7 Build/JRO03D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Safari"; content:!"Safari/535.19"; http.cookie; content:"__guid="; startswith; content:"|3b|opqopq="; distance:0; fast_pattern; content:"|3b|QiHooGUID="; distance:0; content:"|3b|"; endswith; http.header_names; to_lowercase; content:!"|0d 0a|accept-"; content:!"|0d 0a|referer|0d 0a|"; classtype:command-and-control; sid:2032746; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_09_11, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2024_05_04, reviewed_at 2024_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)