alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Alibaba Sentinel Default Credentials (CNVD-2021-35876)"; flow:established,to_server; http.uri; content:"/auth/login?"; content:"password=sentinel"; fast_pattern; content:"username=sentinel"; http.method; content:"POST"; reference:url,www.cnvd.org.cn/flaw/show/CNVD-2021-35876; classtype:web-application-attack; sid:2071354; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_07_31, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_31, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)