alert http any any -> $HOME_NET any (
msg:"ET WEB_SERVER Microsoft Windows Server Update Services (WSUS) Unauthenticated Remote Code Execution via Insecure Deserialization (CVE-2025-59287)";
flow:established,to_server;
http.uri;
content:"/ReportingWebService/ReportingWebService.asmx"; fast_pattern; startswith;
http.header;
content:"/SoftwareDistribution/ReportEventBatch";
http.request_body;
content:"MiscData";
content:"Administrator|3d|";
content:"SynchronizationUpdateErrorsKey";
reference:url,hawktrace.com/blog/CVE-2025-59287-UNAUTH;
reference:cve,2025-59287;
classtype:web-application-attack;
sid:2065382; rev:1;
metadata:affected_product Windows_Server_2019, affected_product Windows_Server_2022, affected_product Windows_Server_2016, affected_product Windows_Server_2012, affected_product Windows_Server_2025, attack_target Server, tls_state TLSDecrypt, created_at 2025_10_24, cve CVE_2025_59287, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
target:dest_ip;
)