activity in adump

HI

Good day,

May i Kindly ask on why i keep on getting .aud file on our adump, our security department is asking if what kind of this job is this since they are checking all activity by sysdba. i am trying to find it but no success( activity trigger every 00:00 am, 4:00am and 7:30am)

Hope someone can help on where should i start looking.

activity in .aud file is something like this

----

Fri Jan 21 04:00:16 2022 +08:00

LENGTH : '155'

ACTION :[7] 'CONNECT'

DATABASE USER:[1] '/'

PRIVILEGE :[6] 'SYSDBA'

CLIENT USER:[6] 'oracle'

CLIENT TERMINAL:[0] ''

STATUS:[1] '0'

DBID:[10] '2343026806'

Fri Jan 21 04:00:16 2022 +08:00