alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CozyCar V2 CnC Beacon"; flow:established,to_server; http.header; content:"=12&"; content:"=2"; distance:1; within:8; content:"=="; distance:12; within:6; content:"=="; distance:18; within:10; http.request_line; content:".php? HTTP/1."; fast_pattern; reference:url,www.us-cert.gov/security-publications/GRIZZLY-STEPPE-Russian-Malicious-Cyber-Activity; classtype:command-and-control; sid:2023966; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_17, deployment Perimeter, malware_family APT29_CozyCar, confidence High, signature_severity Major, tag c2, updated_at 2024_04_06, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)