alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RocketKitten APT Checkin"; flow:established,to_server; http.uri; content:"/index.php?c="; content:"&r="; distance:0; http.header; content:"User-Agent|3a 20|Mozilla/5.0|0d 0a|"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:url,isc.sans.edu/forums/diary/Rocket+Kitten+Is+it+still+APT+if+you+can+buy+it+off+the+shelf/19123; reference:md5,f89a4d4ae5cca6d69a5256c96111e707; classtype:targeted-activity; sid:2020078; rev:5; metadata:created_at 2014_12_29, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)