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O365 Email Reported by User as Malware or Phish

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O365 Email Reported by User as Malware or Phish

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Detects the occurrence of emails reported as Phishing or Malware by Users. Security Awareness training is essential to stay ahead of scammers and threat actors, as security products can be bypassed, and the user can still receive a malicious message. Educating users to report suspicious messages can help identify gaps in security controls and prevent malware infections and Business Email Compromise attacks.

Rule type: query

Rule indices:

filebeat-*
logs-o365*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://support.microsoft.com/en-us/office/use-the-report-message-add-in-b5caa9f1-cdf3-4443-af8c-ff724ea719d2?ui=en-us&rs=en-us&ad=us

Tags:

Elastic
Cloud
Microsoft 365
Continuous Monitoring
SecOps
Initial Access

Version: 101 (version history)

Added (Elastic Stack release): 8.1.0

Last modified (Elastic Stack release): 8.6.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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Legitimate files reported by the users

Investigation guide

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Rule query

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event.dataset:o365.audit and event.provider:SecurityComplianceCenter
and event.action:AlertTriggered and rule.name:"Email reported by user
as malware or phish"

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
Technique:
- Name: Phishing
- ID: T1566
- Reference URL: https://attack.mitre.org/techniques/T1566/

Rule version history

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Version 101 (8.6.0 release)

Formatting only

Version 100 (8.5.0 release)

Formatting only

Version 3 (8.4.0 release)

Formatting only

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