Rule History

alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS ConnectWise ScreenConnect - Attempted User Creation via SetupWizard with Auth Bypass CWE-288 (CVE-2024-1709)"; flow:established,to_server; flowbits:set,ET.ScreenConnectAuthBypass.UserCreateAttempt; http.method; content:"POST"; http.uri; content:"/SetupWizard.aspx/"; startswith; http.request_body; content:"userNameBox|3d|"; content:"emailBox|3d|"; content:"passwordBox|3d|"; reference:url,github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc/blob/main/watchtowr-vs-ConnectWise_2024-02-21.py; reference:url,www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8; reference:cve,2024-1709; classtype:attempted-admin; sid:2050991; rev:1; metadata:attack_target Web_Server, tls_state TLSDecrypt, created_at 2024_02_21, cve CVE_2024_1709, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag CISA_KEV, updated_at 2024_02_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)