alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon MalDoc CnC Exfil"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php"; http.user_agent; content:"Mozilla/"; startswith; content:"|3a 3a|"; distance:0; content:"|3a 3a 2f 2e|"; within:50; fast_pattern; http.header_names; content:!"Referer"; content:!"Cache-"; reference:md5,bbfef3fcb75449889e544601f7975b34; classtype:command-and-control; sid:2035024; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_19, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_19;)