alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET EXPLOIT .NET Framework Remote Code Execution Injection (CVE-2020-0646)";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"_vti_bin";
content:"/webpartpages.asmx"; endswith;
http.request_body;
content:"<?xml";
content:"System.Diagnostics.Process.Start"; fast_pattern;
reference:url,dl.packetstormsecurity.net/2003-exploits/sharepoint_workflows_xoml.rb.txt;
reference:cve,2020-0646;
classtype:attempted-admin;
sid:2034509; rev:1;
metadata:created_at 2021_11_18, cve CVE_2020_0646, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_18, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)