alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE MSIL/Agent.PYO Receiving Config"; flow:established,to_client; file.data; content:"path = "; within:7; content:"|0a|delay = "; distance:0; pcre:"/^\d+\n/R"; content:"hash = "; within:7; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R"; reference:url,welivesecurity.com/2015/01/29/msilagent-pyo-have-botnet-will-travel/; classtype:trojan-activity; sid:2020335; rev:3; metadata:created_at 2015_01_30, malware_family MSIL_Agent_PYO, signature_severity Major, updated_at 2024_03_14;)