ET MALWARE CleanUp Loader HTTP Request (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE CleanUp Loader HTTP Request (GET)";
    flow:established,to_server;
    urilen:<18;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/";
    pcre:"/^(?:connect(ivity)?|session)$/R";
    http.user_agent; bsize:7;
    content:"HTTPGET"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|"; nocase;
    reference:url,go.recordedfuture.com/hubfs/reports/cta-2024-1009.pdf;
    reference:url,community.emergingthreats.net/t/signature-cleanup-loader/2038/;
    classtype:trojan-activity;
    sid:2056580; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_09, deployment Perimeter, deployment SSLDecrypt, malware_family Cleanup_Loader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_09;
)