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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: 2026-07-25T23:00:00Z · Confidence: medium

Hunt Hypothesis

This hunt hypothesis identifies adversary activity where attackers leverage specific .NET-based red and black team tools by analyzing unique TypeLibGUID signatures within process execution events. Proactively hunting for these indicators in Azure Sentinel allows the SOC to distinguish legitimate security tooling from potential malicious reconnaissance or lateral movement attempts that mimic standard administrative workflows.

YARA Rule

rule HKTL_NET_GUID_RegistryStrikesBack {
    meta:
        description = "Detects .NET red/black-team tools via typelibguid"
        reference = "https://github.com/mdsecactivebreach/RegistryStrikesBack"
        author = "Arnim Rupp"
        date = "2021-01-21"
    strings:
        $typelibguid0 = "90ebd469-d780-4431-9bd8-014b00057665" 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 4 specific false positive scenarios for the rule “Detects .NET red/black-team tools via typelibguid,” along with suggested filters or exclusions:

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