ET MALWARE Win32.Raccoon Stealer CnC Activity (dependency download)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Raccoon Stealer CnC Activity (dependency download)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri.raw;
    content:"//l/f/"; startswith; fast_pattern;
    pcre:"/^[A-Za-z0-9_]{20}\/[a-f0-9]{40}$/R";
    http.header_names;
    content:!"|0d 0a|User-Agent|0d 0a|";
    content:!"|0d 0a|Referer|0d 0a|";
    classtype:command-and-control;
    sid:2033973; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, malware_family Raccoon_Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_16;
)