alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Monsoon Tinytyphon CnC Beacon GET"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/dw.php"; fast_pattern; endswith; http.header; strip_pseudo_headers; header_lowercase; content:"accept|3a 20 2a 2f 2a 0d 0a|"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,f32c5a923393a2ae2fcd292f299b63b1; reference:url,blogs.forcepoint.com/security-labs/monsoon-analysis-apt-campaign; classtype:command-and-control; sid:2023049; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_08_11, deployment Perimeter, malware_family MONSOON, malware_family Tinytyphon, confidence Medium, signature_severity Major, tag c2, updated_at 2024_05_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)