Add antivm_display signature

[kevross33]

Add signature to detect use of EnumDisplayDevices such as in Pikabot (https://capesandbox.com/analysis/41245/#)

[gemini-code-assist]

Summary of Changes

Hello @kevross33, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new anti-virtual machine signature designed to identify malware that attempts to detect its execution environment by querying display devices. By adding this detection capability, the system can better identify and flag suspicious activities, particularly those employed by sophisticated threats like Pikabot, thereby improving overall threat intelligence and analysis.

Highlights

• New Anti-VM Signature: A new signature, QueriesDisplayDevices, has been added to detect virtual machine evasion techniques by monitoring calls to EnumDisplayDevicesA and EnumDisplayDevicesW APIs.
• Malware Detection Enhancement: This signature specifically targets behaviors observed in malware families like Pikabot, enhancing the system's ability to identify anti-VM checks and improve threat intelligence.

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[gemini-code-assist]

Code Review

This pull request adds a new Cuckoo signature, antivm_display, to detect anti-VM techniques that involve querying display devices using EnumDisplayDevicesA or EnumDisplayDevicesW. The implementation is sound, but I have provided a couple of suggestions to improve consistency with other signatures in the project and to simplify the code. My recommendations include renaming the signature and class for consistency, increasing the severity to match similar checks, and refactoring the implementation to use a more standard pattern for evented signatures.