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dynamic: "create thread bypassing process freeze" FPs #1023

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mike-hunhoff opened this issue Mar 14, 2025 · 0 comments · May be fixed by #1025
Open

dynamic: "create thread bypassing process freeze" FPs #1023

mike-hunhoff opened this issue Mar 14, 2025 · 0 comments · May be fixed by #1025
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false positive False positive rule hit

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@mike-hunhoff
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I'm seeing many FPs for create thread bypassing process freeze for capa dynamic anlaysis of CAPE sandbox, e.g.:

  NtCreateThreadEx(
    ThreadHandle=0x3f8,
    ProcessHandle=0xffffffff,
    StartAddress=0x100100,
    Parameter=0x40,
    CreateFlags=0x1,
    ThreadId=0x1df8,
    ProcessId=0x1a70,
    Module="example.exe",
  ) -> 0x0

capa is detecting 0x40 constant passed via Parameter but we only want to match if it is passed via CreateFlags.
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dynamic: "create thread bypassing process freeze" FPs #1023 dhruvak001/capa-rules
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@mike-hunhoff