ET POLICY Dropbox Client Broadcasting

alert udp $HOME_NET 17500 -> any 17500 (
    msg:"ET POLICY Dropbox Client Broadcasting";
    content:"{|22|host_int|22 3a| "; depth:13;
    content:" |22|version|22 3a| ["; distance:0;
    content:"], |22|displayname|22 3a| |22|"; distance:0;
    threshold:type limit, count 1, seconds 3600, track by_src;
    classtype:policy-violation;
    sid:2012648; rev:3;
    metadata:created_at 2011_04_07, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)