Tool_MSIL_CSharpUtils_1


Description

The TypeLibGUID present in a .NET binary maps directly to the ProjectGuid found in the '.csproj' file of a .NET project. This rule looks for .NET PE files that contain the ProjectGuid found in the 'CSharpUtils' project.

Query · yara

strings:
        $typelibguid0 = "2130bcd9-7dd8-4565-8414-323ec533448d" ascii nocase wide
        $typelibguid1 = "319228f0-2c55-4ce1-ae87-9e21d7db1e40" ascii nocase wide
        $typelibguid2 = "4471fef9-84f5-4ddd-bc0c-31f2f3e0db9e" ascii nocase wide
        $typelibguid3 = "5c3bf9db-1167-4ef7-b04c-1d90a094f5c3" ascii nocase wide
        $typelibguid4 = "ea383a0f-81d5-4fa8-8c57-a950da17e031" ascii nocase wide
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and any of them
Raw source Tool_MSIL_CSharpUtils_1 · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified.
rule Tool_MSIL_CSharpUtils_1
{
    meta:
        description = "The TypeLibGUID present in a .NET binary maps directly to the ProjectGuid found in the '.csproj' file of a .NET project. This rule looks for .NET PE files that contain the ProjectGuid found in the 'CSharpUtils' project."
        md5 = "dd8805d0e470e59b829d98397507d8c2"
        reference = "https://www.fireeye.com/blog/products-and-services/2020/12/fireeye-shares-details-of-recent-cyber-attack-actions-to-protect-community.html"
        author = "FireEye"
        id = "a0e8c45a-759a-5611-aa2a-3113a75fb651"
    strings:
        $typelibguid0 = "2130bcd9-7dd8-4565-8414-323ec533448d" ascii nocase wide
        $typelibguid1 = "319228f0-2c55-4ce1-ae87-9e21d7db1e40" ascii nocase wide
        $typelibguid2 = "4471fef9-84f5-4ddd-bc0c-31f2f3e0db9e" ascii nocase wide
        $typelibguid3 = "5c3bf9db-1167-4ef7-b04c-1d90a094f5c3" ascii nocase wide
        $typelibguid4 = "ea383a0f-81d5-4fa8-8c57-a950da17e031" ascii nocase wide
    condition:
        (uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and any of them
}

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