alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malicious Powershell Loader Payload Request (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/atom.xml"; endswith; fast_pattern; http.user_agent; content:"WindowsPowerShell/"; http.host; content:"blogspot.com"; endswith; reference:url,uptycs.com/blog/understanding-stealerium-malware-and-its-evasion-techniques; classtype:trojan-activity; sid:2047905; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_09_05, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_07; target:src_ip;)