alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Sednit/APT28/Sofacy Delphocy CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"as_q="; content:"as_ft="; fast_pattern; http.content_type; content:"application/x-www-form-urlencoded"; startswith; http.header_names; content:!"Referer|0d 0a|"; content:!"Accept"; reference:url,www.welivesecurity.com/post_paper/en-route-with-sednit-part-3-a-mysterious-downloader/; classtype:targeted-activity; sid:2023486; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_08, deployment Perimeter, malware_family APT28, malware_family Sofacy, malware_family Sednit_Delphocy, signature_severity Major, tag c2, updated_at 2020_10_07, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)