alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT29/Wellness CnC Host Checkin"; flow:established,to_server; urilen:1; http.method; content:"POST"; http.cookie; content:".+"; fast_pattern; isdataat:100,relative; content:".+"; distance:0; content:".+"; distance:0; content:"%3a"; nocase; content:"%2c"; nocase; http.request_body; pcre:"/^(?:[a-z0-9:.,]{3,10}\s){50,}[a-z0-9:.,]{3,10}\s*$/i"; reference:md5,98fe909510c79b21e740fec32fb6b1a0; reference:url,blogs.jpcert.or.jp/en/2018/07/malware-wellmes-9b78.html; classtype:targeted-activity; sid:2030846; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_09_08, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_08;)