alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Bitter APT Related Activity (GET)";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/profiles.php?profiles="; fast_pattern;
pcre:"/^[A-Za-z]{15,20}$/R";
http.header_names;
content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22;
reference:md5,6e4b4eb701f3410ebfb5925db32b25dc;
reference:url,twitter.com/k3yp0d/status/1527656133837594624;
classtype:trojan-activity;
sid:2036645; rev:1;
metadata:attack_target Client_Endpoint, created_at 2022_05_20, deployment Perimeter, malware_family Bitter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_20;
)