alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Mattermost API Usage"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/v4/teams/name/"; http.header; content:"|0d 0a|Authorization|3a 20|Bearer|20|"; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; content:!"User-Agent"; reference:md5,df7e78609dd63fe9f3be87be0e2420fa; classtype:misc-activity; sid:2029599; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_03_09, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_03_09;)