DLL Load By System Process From Suspicious Locations

 1title: DLL Load By System Process From Suspicious Locations
 2id: 9e9a9002-56c4-40fd-9eff-e4b09bfa5f6c
 3status: experimental
 4description: Detects when a system process (i.e. located in system32, syswow64, etc.) loads a DLL from a suspicious location or a location with permissive permissions such as "C:\Users\Public"
 5references:
 6    - https://github.com/hackerhouse-opensource/iscsicpl_bypassUAC (Idea)
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022/07/17
 9modified: 2023/09/18
10tags:
11    - attack.defense_evasion
12    - attack.t1070
13logsource:
14    product: windows
15    category: image_load
16detection:
17    selection:
18        Image|startswith: 'C:\Windows\'
19        ImageLoaded|startswith:
20            # TODO: Add more suspicious paths as you see fit in your env
21            - 'C:\Users\Public\'
22            - 'C:\PerfLogs\'
23    condition: selection
24falsepositives:
25    - Unknown
26level: medium