alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Legion Loader Activity Observed (YourUserAgent)"; flow:established,to_server; http.user_agent; content:"YourUserAgent"; fast_pattern; startswith; http.accept; content:"text/*"; startswith; endswith; http.header_names; content:"|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith; http.host; content:!"api.ipify.org"; reference:url,www.deepinstinct.com/blog/untangling-legion-loaders-hornet-nest-of-malware; classtype:trojan-activity; sid:2029062; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_27, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_14;)