alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE W32/FakeFlash.Dropper Initial CnC Beacon"; flow:established,to_server; dsize:8; content:"PutToken"; depth:8; reference:md5,43839d131dff01e9b752d91c2c8f68a8; classtype:command-and-control; sid:2018185; rev:1; metadata:attack_target Client_Endpoint, created_at 2014_02_27, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)