alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET MALWARE Agrius Group ASPXSpy Webshell Connection Inbound M2";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".aspx"; endswith;
http.cookie;
content:"limitLengthList=";
content:"limitLengthSql=";
content:"startLimitNumberList="; fast_pattern;
content:"drive=";
content:"directory=";
content:"mode=";
reference:url,unit42.paloaltonetworks.com/agonizing-serpens-targets-israeli-tech-higher-ed-sectors/;
classtype:trojan-activity;
sid:2049903; rev:1;
metadata:affected_product Microsoft_IIS, attack_target Web_Server, created_at 2024_01_03, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_01_03;
target:dest_ip;
)