Potential DLL Sideloading Of MsCorSvc.DLL

Detects potential DLL sideloading of "mscorsvc.dll".

Sigma rule (View on GitHub)

 1title: Potential DLL Sideloading Of MsCorSvc.DLL
 2id: cdb15e19-c2d0-432a-928e-e49c8c60dcf2
 3status: experimental
 4description: Detects potential DLL sideloading of "mscorsvc.dll".
 5references:
 6    - https://hijacklibs.net/entries/microsoft/built-in/mscorsvc.html
 7author: Wietze Beukema
 8date: 2024/07/11
 9tags:
10    - attack.defense_evasion
11    - attack.t1574.002
12logsource:
13    product: windows
14    category: image_load
15detection:
16    selection:
17        ImageLoaded|endswith: '\mscorsvc.dll'
18    filter_main_generic:
19        ImageLoaded|startswith:
20            - 'C:\Windows\Microsoft.NET\Framework\'
21            - 'C:\Windows\Microsoft.NET\Framework64\'
22            - 'C:\Windows\WinSxS\'
23    condition: selection and not 1 of filter_main_*
24falsepositives:
25    - Legitimate applications loading their own versions of the DLL mentioned in this rule.
26level: medium

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