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Exchange Safe Link policy disabled or removed

Synopsis

Field
Value

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

Office 365 Audit

Detection Modules

Identity Threat Module, SaaS Threat Detection, Email

ATT&CK Tactic

Initial Access (TA0001), Defense Impairment (TA0112)

ATT&CK Technique

Disable or Modify Tools (T1685), Phishing: Spearphishing Link (T1566.002)

Severity

Low

Description

A user disabled an Exchange Safe Link policy, which provides phishing protection to emails that contain hyperlinks.

Attacker's Goals

An attacker is attempting to bypass security measures associated with hyperlinks in email messages.

Investigative actions

  • Follow further actions done by the account.

  • Verify that the configuration change was expected.

  • Look for email messages received with hyperlinks.

  • Check for a possible phishing campaign on the organization.

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