ET MALWARE Win32/BLUELIGHT OAuth Login Attempt

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/BLUELIGHT OAuth Login Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/oauth20_token.srf"; bsize:18; nocase;
    http.request_body;
    content:"client_id=b893cacd-9d41-4457-9e7d-47081a065095&client_secret=KT_onD~A9uRpIyjzoL_O1w3pDZ~1Zz488C"; startswith; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,0b649bc5dbbf21801c21aaa5e5f79fc6;
    reference:url,www.volexity.com/blog/2021/08/17/north-korean-apt-inkysquid-infects-victims-using-browser-exploits;
    classtype:trojan-activity;
    sid:2033740; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_18, deployment Perimeter, deployment SSLDecrypt, malware_family BLUELIGHT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_18;
)