alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Trojan.Valyria.6015 CnC Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/eln-images/"; startswith; fast_pattern; http.user_agent; content:"WindowsPowerShell/"; http.header_names; content:!"Referer"; reference:md5,a118a3030807156eca8f805b8b83ce1f; classtype:trojan-activity; sid:2035223; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_18, deployment Perimeter, malware_family Win32_Trojan_Valyria_6015, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_18, reviewed_at 2024_06_26;)