alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET CURRENT_EVENTS [Fireeye] Backdoor.HTTP.BEACON.[CSBundle Original POST]"; flow:established,to_server; content:"ses-"; content:"{|22|locale|22 3a 22|en|22|,|22|channel|22 3a 22|prod|22|,|22|addon|22 3a 22|"; fast_pattern; http.method; content:"POST"; http.accept; content:"*/*"; bsize:3; http.accept_lang; content:"en-US"; bsize:5; http.accept_enc; content:"gzip, deflate"; bsize:13; http.request_line; pcre:"/^POST\s(?:\/v4\/links\/check-activity\/check|\/v1\/stats|\/gql|\/api2\/json\/check\/ticket|\/1.5\/95648064\/storage\/history|\/1.5\/95648064\/storage\/tabs|\/u\/0\/_\/og\/botguard\/get|\/ev\/prd001001|\/ev\/ext001001|\/gp\/aw\/ybh\/handlers|\/v3\/links\/ping-beat\/check)/"; reference:url,github.com/fireeye/red_team_tool_countermeasures; classtype:trojan-activity; sid:2031284; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_08, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2020_12_09, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)