alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [Fireeye] Backdoor.BEACON M1"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"name=|22|"; content:"|22 3b|filename=|22|"; content:"|22 0a|Content-Type|3a|"; fast_pattern; reference:url,www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html; classtype:trojan-activity; sid:2031323; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_12_14, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2020_12_14, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)