Unusual Mailbox Access
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About the rule
Rule Type
Anomaly
Rule Description
Detects mailbox access by someone other than the owner, indicating potential misuse.
Severity
Critical
Rule Requirement
Criteria
Action1:
actionname = "ERP_Non_Owner_Activity_On_Mailbox"
| isanomalous(User at an unusual Time)
| isanomalous(User with abnormal Count)
| isanomalous(User with unusual Mailbox Name)
| isanomalous(User with unusual Folder Accessed)
| isanomalous(User with unusual Operation)
| isanomalous(User with unusual Email)
select Action1.CALLER_USER_NAME,Action1.MAILBOX_NAME,Action1.FOLDER_ACCESSED,Action1.SERVER,Action1.OPERATION,Action1.OPERATION_RESULT,Action1.CLIENTIP,Action1.CLIENT_DETAILS,Action1.EMAIL,Action1.LOGONTYPE
Detection
Execution Mode
Intelligent
Log Sources
Miscellaneous
