alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Base64 Encoded ipconfig sent via HTTP URI M2"; flow:established,to_server; http.uri; content:"dpbmRvd3MgSVAgQ29uZmlndXJhdGlvb"; fast_pattern; pcre:"/(?:Q29ubmVjdGlvbi1zcGVjaWZpYyBETlMgU3VmZml4|Nvbm5lY3Rpb24tc3BlY2lmaWMgRE5TIFN1ZmZpe|Db25uZWN0aW9uLXNwZWNpZmljIEROUyBTdWZmaX)/R"; reference:md5,1df312629294f2de70a335a751a13a28; classtype:unknown; sid:2036567; rev:1; metadata:attack_target Client_and_Server, created_at 2022_05_12, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_12;)