alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Sysget/HelloBridge HTTP POST CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?fn="; fast_pattern; http.request_body; content:"name=|22|file|22|"; content:"name=|22|path|22|"; distance:0; content:"name=|22|submit|22|"; distance:0; http.header_names; content:!"Accept-"; content:!"Referer|0d 0a|"; reference:url,researchcenter.paloaltonetworks.com/2015/04/unit-42-identifies-new-dragonok-backdoor-malware-deployed-against-japanese-targets/; classtype:command-and-control; sid:2020922; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_04_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_30, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)