alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Win32/Lumma Stealer Data Exfiltration in URI (GET)";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?user=";
content:"&pc=";
content:"&os=Microsoft|20|Windows"; fast_pattern;
http.user_agent;
content:"WinHttp.WinHttpRequest";
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
http.host;
pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
reference:md5,17e11f6f7d064992deeb632e62b64e8e;
reference:url,twitter.com/1ZRR4H/status/1709421805880877346;
classtype:trojan-activity;
sid:2048391; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_10_04, deployment Perimeter, malware_family lumma, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_22, reviewed_at 2023_10_04;
)