alert http any any -> $HOME_NET any (msg:"ET EXPLOIT F5 BIG-IP iControl REST Authentication Bypass (CVE-2022-1388) M1"; flow:established,to_server; flowbits:set,ET.F5AuthBypass; http.method; content:"POST"; http.uri; bsize:18; content:"/mgmt/tm/util/bash"; fast_pattern; http.header; header_lowercase; content:"authorization|3a 20|Basic|20|YWRtaW46"; http.connection; content:"x-F5-Auth-Token"; nocase; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:"|0d 0a|x-f5-auth-token|0d 0a|"; http.request_body; content:"command"; content:"run"; distance:0; content:"utilCmdArgs"; distance:0; reference:cve,2022-1388; classtype:attempted-admin; sid:2036546; rev:6; metadata:created_at 2022_05_09, cve CVE_2022_1388, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, reviewed_at 2024_09_12, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)