alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE IndigoZebra APT BoxCaon DropBox Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/2/files/create_folder_v2"; bsize:25; http.header; content:"Authorization|3a 20|Bearer|20|iioKFUvLMX0AAAAAAAAAARDKLMS9uW1ax9ogdxWVqMC582VLW-CVofMpeFTEVfhU|0d 0a|"; fast_pattern; http.host; content:"api.dropboxapi.com"; bsize:18; reference:md5,974201f7895967bff0b018b95d5f5f4b; reference:url,research.checkpoint.com/2021/indigozebra-apt-continues-to-attack-central-asia-with-evolving-tools/; classtype:command-and-control; sid:2033220; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_02;)