ttp_t1562-001_disabledefender.md

TTP Detection Rule: Abusing PowerShell to disable Defender components

Query Information

MITRE ATT&CK Technique(s)

Technique ID	Title	Link
T1562.001	Impair Defenses: Disable or Modify Tools	Disable or Modify Tools

Description

Detection opportunity: Abusing PowerShell to disable Defender components

We also observed at least one of these adversaries abusing PowerShell to exclude certain files or processes from Windows Defender scanning. Luckily, this is common tradecraft for which we’ve shared similar detection ideas on multiple occasions. The following may unearth this and other threats:

Risk

FIN7, ZLoader, and FakeBat have been observed performing this behaviour in recent intrusions. Adversaries may modify and/or disable security tools to avoid possible detection of their malware/tools and activities.

Author

• Name: Gavin Knapp
• Github: https://github.com/m4nbat
• Twitter: https://twitter.com/knappresearchlb
• LinkedIn: https://www.linkedin.com/in/grjk83/
• Website:

References

• https://kqlquery.com/

Defender XDR

//Detection opportunity 3: Abusing PowerShell to disable Defender components
DeviceProcessEvents
| where FileName =~ "powershell.exe" and ProcessCommandLine has_any ("Add-MpPreference","Set-MpPreference") and ProcessCommandLine has_any ("ExclusionProcess","ExclusionPath")

Sentinel

//Detection opportunity 3: Abusing PowerShell to disable Defender components
DeviceProcessEvents
| where FileName =~ "powershell.exe" and ProcessCommandLine has_any ("Add-MpPreference","Set-MpPreference") and ProcessCommandLine has_any ("ExclusionProcess","ExclusionPath")