alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Bitter Elephant APT Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?id="; content:"|3b|timeout"; distance:0; endswith; fast_pattern; http.header_names; content:!"Referer"; content:"|0d 0a|Host|0d 0a|Proxy-Connection|0d 0a|Upgrade-Insecure-Requests|0d 0a|"; reference:md5,ba068724f569d98d56fcfb473449c8df; reference:url,twitter.com/suyog41/status/1640346154205343747; classtype:trojan-activity; sid:2044833; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_30; target:src_ip;)