alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/OzazaLocker Ransomware CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?key="; fast_pattern; content:"&value="; distance:0; http.header_names; content:"|0d 0a|Host|0d 0a|"; depth:8; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,e8c6d686249fc3c6df3dc88ea2cddf02; classtype:command-and-control; sid:2024276; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_05_04, deployment Perimeter, malware_family OzazaLocker, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)