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;)