--- /dev/null
+**Phase 1: Completed pre-decoding.
+ full event: 'May 26 20:16:17 lili sudo: dcid : TTY=pts/1 ; PWD=/home/dcid ; USER=root ; COMMAND=/usr/bin/vi /etc/sudoers'
+ hostname: 'lili'
+ program_name: 'sudo'
+ log: 'dcid : TTY=pts/1 ; PWD=/home/dcid ; USER=root ; COMMAND=/usr/bin/vi /etc/sudoers'
+
+**Phase 2: Completed decoding.
+ decoder: 'sudo'
+
+**Phase 3: Completed filtering (rules).
+ Rule id: '5403'
+ Level: '4'
+ Description: 'First time user executed sudo.'
+**Alert to be generated.
+
+