EXPLORE
Sign In
← Back to Explore
sigmahighHunting

DLL Loaded From Suspicious Location Via Cmspt.EXE

Detects cmstp loading "dll" or "ocx" files from suspicious locations

MITRE ATT&CK

T1218.003
defense-evasion

Detection Query

selection:
  Image|endswith: \cmstp.exe
  ImageLoaded|contains:
    - \PerfLogs\
    - \ProgramData\
    - \Users\
    - \Windows\Temp\
    - C:\Temp\
  ImageLoaded|endswith:
    - .dll
    - .ocx
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-08-30

Data Sources

windowsImage Load Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218.003
Raw Content
title: DLL Loaded From Suspicious Location Via Cmspt.EXE
id: 75e508f7-932d-4ebc-af77-269237a84ce1
status: test
description: Detects cmstp loading "dll" or "ocx" files from suspicious locations
references:
    - https://github.com/vadim-hunter/Detection-Ideas-Rules/blob/02bcbfc2bfb8b4da601bb30de0344ae453aa1afe/TTPs/Defense%20Evasion/T1218%20-%20Signed%20Binary%20Proxy%20Execution/T1218.003%20-%20CMSTP/Procedures.yaml
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-30
modified: 2023-02-17
tags:
    - attack.defense-evasion
    - attack.t1218.003
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith: '\cmstp.exe'
        ImageLoaded|contains:
            # Add more suspicious paths as you see fit in your env
            - '\PerfLogs\'
            - '\ProgramData\'
            - '\Users\'
            - '\Windows\Temp\'
            - 'C:\Temp\'
        ImageLoaded|endswith:
            - '.dll'
            - '.ocx'
    condition: selection
falsepositives:
    - Unikely
level: high