← Back to SOC feed Coverage →

Detects .NET red/black-team tools via typelibguid

yara LOW Yara-Rules
communitynet_guid
This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-07-25T11:00:00Z · Confidence: medium

Hunt Hypothesis

This rule identifies potential adversary activity by detecting the execution of known .NET-based red and blue team tools through their unique TypeLibGUID signatures within Azure Sentinel. Proactively hunting for these indicators allows the SOC to distinguish legitimate security tooling from malicious .NET processes that may mimic similar behaviors, thereby reducing false positives and uncovering stealthy reconnaissance or post-exploitation activities.

YARA Rule

rule HKTL_NET_GUID_DInvoke {
    meta:
        description = "Detects .NET red/black-team tools via typelibguid"
        reference = "https://github.com/TheWover/DInvoke"
        author = "Arnim Rupp"
        date = "2021-01-21"
    strings:
        $typelibguid0 = "b77fdab5-207c-4cdb-b1aa-348505c54229" ascii nocase wide
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and any of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 1 string patterns in its detection logic.

References

False Positive Guidance

Here are 5 specific false positive scenarios for the rule “Detects .NET red/black-team tools via typelibguid,” including suggested filters and exclusions:

Original source: https://github.com/Yara-Rules/rules/blob/main/malware/TOOLKIT_Redteam_Tools_by_GUID.yar