alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Konni APT Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?q="; content:".txt"; endswith; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; fast_pattern; http.header_names; content:!"Referer"; reference:md5,00c85f0aa5f0c3ce51505cf807fd5af3; reference:url,twitter.com/ShadowChasing1/status/1636391606592094208; classtype:trojan-activity; sid:2044694; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_20, deployment Perimeter, malware_family KONNI, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_20; target:src_ip;)