alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZharkBOT CnC Activity (GET) M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2f|socket|2f 3f|id|3d|"; startswith; fast_pattern; pcre:"/^(?:[A-Z0-9]{64})\x26/R"; content:"os="; distance:0; http.header_names; content:!"|0d 0a|referer|0d 0a|"; nocase; reference:md5,ab47202cd4ca44239b833fb5a8486e17; classtype:command-and-control; sid:2057062; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_25, deployment Perimeter, deployment SSLDecrypt, malware_family ZharkBOT, confidence High, signature_severity Critical, updated_at 2024_10_25;)