alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET CURRENT_EVENTS [Fireeye] Backdoor.HTTP.BEACON.[CSBundle NYTIMES GET]"; flow:established,to_server; content:"nyt-a="; content:"nyt-gdpr=0|3b|nyt-purr=cfh|3b|nyt-geo=US}"; fast_pattern; http.method; content:"GET"; http.accept; content:"*/*"; depth:3; http.accept_enc; content:"gzip, deflate, br"; depth:17; http.accept_lang; content:"en-US,en|3b|q=0.5"; startswith; http.request_line; pcre:"/^GET\s(?:\/(?:(?:v(?:i-assets\/static-asset|[12]\/preference)|idcta\/translation)s|ads\/google))/"; reference:url,github.com/fireeye/red_team_tool_countermeasures; classtype:trojan-activity; sid:2031276; rev:3; metadata: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;)