Sigma rule: Enabling COR Profiler Environment Variables

Rule

Title

Enabling COR Profiler Environment Variables

Status

test

Level

medium

Author

Jose Rodriguez (@Cyb3rPandaH), OTR (Open Threat Research), Jimmy Bayne (@bohops)

Date

2020-09-10

Modified

2023-11-24

File

rules/windows/registry/registry_set/registry_set_enabling_cor_profiler_env_variables.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects .NET Framework CLR and .NET Core CLR "cor_enable_profiling" and "cor_profiler" variables being set and configured.

Log source

product

windows

category

registry_set

Detection

selection_1:
    TargetObject|endswith:
        - '\COR_ENABLE_PROFILING'
        - '\COR_PROFILER'
        - '\CORECLR_ENABLE_PROFILING'
selection_2:
    TargetObject|contains: '\CORECLR_PROFILER_PATH'
condition: 1 of selection_*

Tags

• attack.persistence
• attack.privilege-escalation
• attack.execution
• attack.stealth
• attack.t1574.012

MITRE ATT&CK ids this rule names

• T1574.012

References

• https://twitter.com/jamieantisocial/status/1304520651248668673
• https://www.slideshare.net/JamieWilliams130/started-from-the-bottom-exploiting-data-sources-to-uncover-attck-behaviors
• https://www.sans.org/cyber-security-summit/archives
• https://learn.microsoft.com/en-us/dotnet/core/runtime-config/debugging-profiling

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_enabling_cor_profiler_env_variables.yml