Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE YAHOOYLO Stealer CnC Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; content:"application/x-www-form-urlencoded"; http.request_body; content:"|50 4b 03 04|"; startswith; content:"Information.txt"; distance:0; content:"=Hardware Info==========================|0d 0a|Username|3a 20|"; distance:0; fast_pattern; reference:md5,437e3fb3c14f32644df9c6168ca4fa2c; classtype:command-and-control; sid:2030648; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_08_05, deployment Perimeter, deployment SSLDecrypt, malware_family YAHOOYLO, performance_impact Low, confidence High, signature_severity Major, tag Stealer, updated_at 2020_08_05;)