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;
)