alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NEWPASS CnC Client Checkin"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"newpass="; startswith; content:"&server_page="; distance:0; content:"&passdb="; distance:0; content:"&targetlogin="; distance:0; fast_pattern; content:"&table_data="; distance:0; reference:url,www.telsy.com/turla-venomous-bear-updates-its-arsenal-newpass-appears-on-the-apt-threat-scene/; classtype:command-and-control; sid:2030557; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_07_17, deployment Perimeter, malware_family Turla, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_17;)