ET MALWARE ACR/Amatera Stealer CnC Checkin Attempt M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE ACR/Amatera Stealer CnC Checkin Attempt M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ujs/"; fast_pattern; startswith;
    pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}$/R";
    reference:url,malpedia.caad.fkie.fraunhofer.de/details/win.acr_stealer;
    reference:url,threatfox.abuse.ch/browse/malware/win.acr_stealer/;
    classtype:trojan-activity;
    sid:2052674; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_16, deployment Perimeter, deployment SSLDecrypt, malware_family Amatera, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_05_16;
    target:src_ip;
)