alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/JSWORM Ransomware Style Geo IP Check M2"; flow:established,to_server; http.method; content:"GET"; http.user_agent; bsize:12; content:"IP retriever"; fast_pattern; http.host; content:"api.ipify.org"; endswith; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:url,www.mcafee.com/blogs/other-blogs/mcafee-labs/nemty-ransomware-learning-by-doing/; reference:md5,fbf7ba464d564dbf42699c34b239b73a; classtype:trojan-activity; sid:2034231; rev:4; metadata:attack_target Client_Endpoint, created_at 2021_10_19, deployment Perimeter, deprecation_reason False_Positive, malware_family Win32_JSWORM, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30, reviewed_at 2023_08_22, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)