ET MALWARE Win32/Cobalt Strike CnC Activity M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Cobalt Strike CnC Activity M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.host;
    pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/W";
    http.user_agent;
    content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|Trident|2f|4|2e|0|3b 20|LBBROWSER|29|"; bsize:74; fast_pattern;
    http.connection;
    content:"Keep-Alive"; bsize:10;
    http.header;
    content:"Cache|2d|Control|3a 20|no|2d|cache|0d 0a|";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Cookie|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a|Cache-Control|0d 0a 0d 0a|"; bsize:65;
    http.cookie;
    pcre:"/^(?:[a-zA-Z0-9\x2f\x2b\x3d]{172})$/"; bsize:172;
    reference:md5,c0886a12508c65719e3ec8de02c1ba80;
    reference:url,twitter.com/malwrhunterteam/status/1750138795276566550;
    classtype:trojan-activity;
    sid:2050421; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2024_01_24, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2024_01_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)