ET MALWARE UNC1151 Payload Retrieval Attempt

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE UNC1151 Payload Retrieval Attempt";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".svg"; endswith;
    http.user_agent; bsize:110;
    content:"Mozilla/5.0|20 28|Linux|3b 20|Android 10|3b 20|K|29 20|AppleWebKit/537.36|20 28|KHTML|2c 20|like Gecko|29 20|Chrome/124.0.0.0 Mobile Safari/537.3"; fast_pattern;
    reference:url,cyble.com/blog/unc1151-strikes-again-unveiling-their-tactics-against-ukraines-ministry-of-defence/;
    reference:md5,b152f880c7cd73467642cc93edf4b1cd;
    classtype:trojan-activity;
    sid:2053277; 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_06_06, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_06_06;
    target:src_ip;
)