alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Delf.TJJ Variant CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/getcfg?id="; fast_pattern; pcre:"/^\d$/R"; http.user_agent; content:"Mozilla|2f|3|2e|0|20 28|compatible|3b 20|Indy|20|Library|29|"; bsize:38; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,0751e43ec2a6ce78407b95b1d0326776; classtype:command-and-control; sid:2034900; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_01_12, deployment Perimeter, malware_family Win32_Delf_TJJ, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_12;)