alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [Fireeye] Backdoor.SUNBURST M4"; flow:established,to_server; http.uri; content:"/swip/upd/"; within:75; http.host; content:!".solarwinds.com"; endswith; 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:2031340; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_14, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_14;)