windows enabled community low v1.0.0

csc

Binary file used by .NET Framework to compile C# code Located at: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Csc.exe; C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Csc.exe; C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe.

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csc

csc

Sandbox: execFile · Timeout: 30s

Capabilities

build.compile.code

Contract

Outputs

process.output

Command execution output

Side effects: process_spawn

Workflow Edges

Produces

process.output

Resource Profile

Resource	Value
CPU	low
Memory	16 MB
Network	low
Disk I/O	low

Examples

Use csc.exe to compile C# code, targeting the .NET Framework, stored in the specified .cs file and output the compiled version to the specified .exe path. (Compile attacker code on system. Bypass defensive counter measures.)

csc.exe -out:{PATH:.exe} {PATH:.cs}

Use csc.exe to compile C# code, targeting the .NET Framework, stored in the specified .cs file and output the compiled version to a DLL file with the same name. (Compile attacker code on system. Bypass defensive counter measures.)

csc -target:library {PATH:.cs}

Detection

Type	Rule / Indicator
sigma	https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_csc_susp_parent.yml
sigma	https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_csc_susp_folder.yml
elastic	https://github.com/elastic/detection-rules/blob/61afb1c1c0c3f50637b1bb194f3e6fb09f476e50/rules/windows/defense_evasion_dotnet_compiler_parent_process.toml
elastic	https://github.com/elastic/detection-rules/blob/82ec6ac1eeb62a1383792719a1943b551264ed16/rules/windows/defense_evasion_execution_msbuild_started_unusal_process.toml
ioc	Csc.exe should normally not run as System account unless it is used for development.

Documentation

csc

csc is a Windows LOLBin. Binary file used by .NET Framework to compile C# code Located at: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Csc.exe; C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Csc.exe; C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe.

csc