sigmamediumHunting

Potential Mfdetours.DLL Sideloading

Detects potential DLL sideloading of "mfdetours.dll". While using "mftrace.exe" it can be abused to attach to an arbitrary process and force load any DLL named "mfdetours.dll" from the current directory of execution.

MITRE ATT&CK

T1574.001

persistencedefense-evasionprivilege-escalation

Detection Query

selection:
  ImageLoaded|endswith: \mfdetours.dll
filter_main_legit_path:
  ImageLoaded|contains: :\Program Files (x86)\Windows Kits\10\bin\
condition: selection and not 1 of filter_main_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-08-03

Data Sources

windowsImage Load Events

Platforms

windows

References

Internal Research

Tags

attack.persistenceattack.defense-evasionattack.privilege-escalationattack.t1574.001

Raw Content

title: Potential Mfdetours.DLL Sideloading
id: d2605a99-2218-4894-8fd3-2afb7946514d
status: test
description: Detects potential DLL sideloading of "mfdetours.dll". While using "mftrace.exe" it can be abused to attach to an arbitrary process and force load any DLL named "mfdetours.dll" from the current directory of execution.
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-08-03
tags:
    - attack.persistence
    - attack.defense-evasion
    - attack.privilege-escalation
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\mfdetours.dll'
    filter_main_legit_path:
        ImageLoaded|contains: ':\Program Files (x86)\Windows Kits\10\bin\'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unlikely
level: medium