alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible DANDERSPRITZ HTTP Beacon"; flow:established,to_server; http.method; content:"POST"; http.header; content:"|3a|0000"; http.request_body; content:"|f0 00 00 00 45 ff 11 ff f0 44 00 00|"; fast_pattern; offset:0; classtype:trojan-activity; sid:2024248; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_04_26, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2020_08_05, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)