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O365_File_Access

ID: 100433

Description:

Sharepoint FilePreviewed OR FileDownloaded OR FileAccessed

Repository: Group: Office365 Type: event

Default Status:

Enabled

Tags:
Office365
 

Selector:

Query:

Filters:

Field MUST hit
@sender office365
@fields.Operation FilePreviewed
  FileDownloaded
  FileAccessed
@fields.EventSource SharePoint
Field MUST NOT hit
@fields._ip.isp Microsoft Corporation

Behavior Rule:

Key Type Behavior Category
@fields.UserId username application activity

Risks:

Risks Base Score Dimension
     

Attributes:

Alias Key
Operation @fields.Operation
Username @fields.UserId
Workload @fields.Workload
City @fields._ip.city
Country @fields._ip.country
FileName @fields.SourceFileName
IP @fields.ClientIP
ISP @fields._ip.isp

Correlation Rules:

Aggregation:

Name Window Field AggType Match
FilesAccessed 1 hour @fields.SourceFileName cardinality gt 100
  Risks: ALERT_POLICY    

First Occurrence:

Name Window Fields
NewISP 20 days @fields._ip.isp
  Risks: SUSPICIOUS_GEO
NewCountry 20 days @fields._ip.country
  Risks: ML_NEW_GEO_COUNTRY

History:

User Date
ho*d@fluencysecurity.com 2021 Aug 31 20:38:05 EDT
ho*d@fluencysecurity.com 2021 Aug 31 20:43:01 EDT

This page was automatically created/formatted on Tue, 2021 Oct 19 00:29:17 EDT, from rule_dump.json (db47c470500ce8686ead334f5eda0596)