alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/LeftHook Stealer CnC Activity (GET) M1"; flow:established,to_server; urilen:46; http.method; content:"GET"; http.uri; content:"/getid.php?id="; startswith; fast_pattern; pcre:"/^[a-z]{32}$/R"; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/"; http.connection; bsize:5; content:"close"; http.header_names; bsize:22; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:md5,43967615d9e0e19bc59d32fdb5afd7e4; reference:url,twitter.com/Jane_0sint/status/1648075834702413830; classtype:trojan-activity; sid:2044999; rev:3; metadata:attack_target Client_Endpoint, created_at 2023_04_17, deployment Perimeter, malware_family Win32_LeftHook, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03;)