ET MALWARE WhiteSnake Stealer Telegram Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE WhiteSnake Stealer Telegram Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/bot"; startswith;
    content:"/sendMessage?chat_id="; distance:0;
    content:"|26|text|3d|"; distance:0;
    content:"Beacon"; distance:0;
    content:"OS|3a|"; distance:0;
    content:"Country|3a|"; distance:0;
    content:"Username|3a|"; distance:0;
    content:"Compname|3a|"; distance:0;
    content:"|26|reply|5f|markup|3d|"; distance:0;
    content:"Download|22 2c 22|url|22 3a|"; distance:0; fast_pattern;
    http.host;
    content:"api.telegram.org";
    http.header_names;
    content:!"User-Agent"; nocase;
    reference:md5,fdb8081ac26d8de3f7582b2616bcf3e8;
    classtype:trojan-activity;
    sid:2045869; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_05_25, deployment Perimeter, deployment SSLDecrypt, malware_family Gurcu, malware_family WhiteSnake, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_25, reviewed_at 2025_01_06;
)