alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Pushdo.S CnC response"; flow:established,from_server; flowbits:isset,ET.Pushdo.S; http.header; content:"X-GeoIP-Country-Code|3a| "; content:"X-Real-IP|3a| "; reference:md5,27aef1d328da442d3bd02c50c1a6b651; classtype:command-and-control; sid:2018897; rev:5; metadata:created_at 2014_08_06, former_category RETIRED, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_01_03;)