alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SPECIFIC_APPS Possible Drupal Object Unserialize Exploit Attempt"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"/user/login"; http.request_body; content:"username"; content:"SelectQuery"; fast_pattern; http.content_type; content:"application/vnd.php.serialized"; bsize:30; reference:url,www.ambionics.io/blog/drupal-services-module-rce; classtype:web-application-attack; sid:2024039; rev:4; metadata:affected_product Drupal_Server, attack_target Server, created_at 2017_03_08, deployment Datacenter, performance_impact Moderate, confidence Medium, signature_severity Minor, updated_at 2020_10_08;)