alert http $EXTERNAL_NET any -> [$HTTP_SERVERS,$HOME_NET] any (msg:"ET WEB_SERVER Likely Malicious Request for /proc/<pid>/maps"; flow:established,to_server; http.uri; content:"proc/"; nocase; content:"/maps"; nocase; endswith; fast_pattern; pcre:"/proc\/\d+\/maps$/"; reference:url,vulncheck.com/blog/xiongmai-iot-exploitation; classtype:web-application-attack; sid:2041645; rev:1; metadata:attack_target Web_Server, created_at 2022_12_02, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_02;)