alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE AgentTesla Communicating with CnC Server"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"p="; startswith; fast_pattern; pcre:"/^(?:[A-Za-z0-9%+\/]{4,6})*(?:[A-Za-z0-9%+\/]{2}==|[A-Za-z0-9%+\/]{3}=|[A-Za-z0-9%+\/]{4})$/R"; http.content_type; content:"application/x-www-form-urlencoded"; startswith; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,274ff72c29b0711d01254c95770ca193; classtype:command-and-control; sid:2034579; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_10_10, deployment Perimeter, malware_family AgentTesla, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_05_30, reviewed_at 2023_12_13;)