alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Zoho ManagedEngine Desktop Central Authentication Bypass - File Upload Attempt (CVE-2021-44515)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/STATE_ID/"; startswith; content:"/agentLogUploader?"; distance:0; content:"filename="; nocase; distance:0; pcre:"/^[a-zA-Z0-9]+\.(?:zip|7z|gz)/Ri"; content:"branchofficeid="; nocase; http.cookie; content:"STATE_COOKIE="; reference:url,attackerkb.com/topics/rJw4DFI2RQ/cve-2021-44515/rapid7-analysis; reference:cve,2021-44515; classtype:attempted-admin; sid:2034957; rev:2; metadata:created_at 2022_01_24, cve CVE_2021_44515, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)