alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DeathStalker/Janicab CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?action=add&cn="; fast_pattern; content:"&un="; distance:0; content:"&v="; distance:0; content:"&av="; distance:0; content:"&an="; distance:0; reference:url,securelist.com/deathstalker-mercenary-triumvirate/98177/; classtype:command-and-control; sid:2030725; rev:1; metadata:created_at 2020_08_24, deployment Perimeter, malware_family Janicab, confidence High, signature_severity Major, tag APT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;)