alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Ciadoor.10.UPX CnC Activity M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?action=log&ip="; content:"&usrname="; distance:0; content:"&server=C|2e|I|2e|A"; distance:0; fast_pattern; reference:md5,7055137624d83f3c6025caf1e62e85f6; classtype:command-and-control; sid:2034294; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_29, deployment Perimeter, deprecation_reason Relevance, malware_family Win32_Ciadoor_10_UPX, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_29;)