Exchange malware filter policy removed

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-04
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

  • Requires:
    • Office 365 Audit

Detection Modules

Identity Threat Module

ATT&CK Tactic

Defense Evasion (TA0005)

ATT&CK Technique

Severity

Low

Description

A user removed an Exchange malware filter policy, which may prevent the detection of malware.

Attacker's Goals

An attacker is attempting to evade detection.

Investigative actions

  • Follow further actions done by the account.
  • Verify that the configuration change was expected.
  • Look for signs that the user account is compromised (e.g. abnormal logins, unusual activity).
  • Investigate if any other security policies have been changed or removed.
  • Monitor for signs of malware in future messages.