Unsigned Binary Loaded From Suspicious Location

Detects Code Integrity (CI) engine blocking processes from loading unsigned DLLs residing in suspicious locations

Detection logic

selection

EventID:
  - 11
  - 12
ImageName|contains:
  - \Users\Public\
  - \PerfLogs\
  - \Desktop\
  - \Downloads\
  - \AppData\Local\Temp\
  - C:\Windows\TEMP\

Condition

selection

Raw YAML

title: Unsigned Binary Loaded From Suspicious Location
id: 8289bf8c-4aca-4f5a-9db3-dc3d7afe5c10
status: test
description: Detects Code Integrity (CI) engine blocking processes from loading unsigned DLLs residing in suspicious locations
references:
    - https://github.com/nasbench/EVTX-ETW-Resources/blob/45fd5be71a51aa518b1b36d4e1f36af498084e27/ETWEventsList/CSV/Windows11/21H2/W11_21H2_Pro_20220719_22000.795/Providers/Microsoft-Windows-Security-Mitigations.csv
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-03
modified: 2022-09-28
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    product: windows
    service: security-mitigations
detection:
    selection:
        EventID:
            - 11
            - 12
        ImageName|contains:
            - '\Users\Public\'
            - '\PerfLogs\'
            - '\Desktop\'
            - '\Downloads\'
            - '\AppData\Local\Temp\'
            - 'C:\Windows\TEMP\'
    condition: selection
falsepositives:
    - Unknown
level: high