alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Beacon (Bing Profile)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/search/?q="; startswith; content:"&go=Search&qs=bs&form="; distance:0; fast_pattern; http.cookie; content:"DUP="; startswith; content:"&T="; distance:0; content:"&A="; distance:0; content:"&IG"; endswith; http.header_names; content:!"Referer"; reference:url,twitter.com/TheDFIRReport/status/1376878123061551104; reference:md5,18b0ca0508f92c5ac6e75b9865b77a51; classtype:trojan-activity; sid:2032354; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_03_30, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2022_03_24, reviewed_at 2023_08_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)