Enabling COR Profiler Environment Variables

calendar Aug 12, 2024 · attack.persistence attack.privilege-escalation attack.defense-evasion attack.t1574.012  ·
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Detects .NET Framework CLR and .NET Core CLR "cor_enable_profiling" and "cor_profiler" variables being set and configured.

Sigma rule (View on GitHub)

 1title: Enabling COR Profiler Environment Variables
 2id: ad89044a-8f49-4673-9a55-cbd88a1b374f
 3status: test
 4description: Detects .NET Framework CLR and .NET Core CLR "cor_enable_profiling" and "cor_profiler" variables being set and configured.
 5references:
 6    - https://twitter.com/jamieantisocial/status/1304520651248668673
 7    - https://www.slideshare.net/JamieWilliams130/started-from-the-bottom-exploiting-data-sources-to-uncover-attck-behaviors
 8    - https://www.sans.org/cyber-security-summit/archives
 9    - https://learn.microsoft.com/en-us/dotnet/core/runtime-config/debugging-profiling
10author: Jose Rodriguez (@Cyb3rPandaH), OTR (Open Threat Research), Jimmy Bayne (@bohops)
11date: 2020-09-10
12modified: 2023-11-24
13tags:
14    - attack.persistence
15    - attack.privilege-escalation
16    - attack.defense-evasion
17    - attack.t1574.012
18logsource:
19    category: registry_set
20    product: windows
21detection:
22    selection_1:
23        TargetObject|endswith:
24            - '\COR_ENABLE_PROFILING'
25            - '\COR_PROFILER'
26            - '\CORECLR_ENABLE_PROFILING'
27    selection_2:
28        TargetObject|contains: '\CORECLR_PROFILER_PATH'
29    condition: 1 of selection_*
30level: medium

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