added Jsc.exe - Thanks @DissectMalware

yml/OSBinaries/Jsc.yml

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+---
+Name: Jsc.exe
+Description: Binary file used by .NET to compile javascript code to .exe or .dll format
+Author: 'Oddvar Moe'
+Created: '2019-05-31'
+Commands:
+  - Command: jsc.exe scriptfile.js
+    Description: Use jsc.exe to compile javascript code stored in scriptfile.js and output scriptfile.exe.
+    Usecase: Compile attacker code on system. Bypass defensive counter measures.
+    Category: Compile
+    Privileges: User
+    MitreID: T1127
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1127
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: jsc.exe /t:library Library.js
+    Description: Use jsc.exe to compile javascript code stored in Library.js and output Library.dll.
+    Usecase: Compile attacker code on system. Bypass defensive counter measures.
+    Category: Compile
+    Privileges: User
+    MitreID: T1127
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1127
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+Full_Path:
+  - Path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Jsc.exe
+  - Path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Jsc.exe
+  - Path: C:\Windows\Microsoft.NET\Framework\v2.0.50727\Jsc.exe
+  - Path: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Jsc.exe
+Code_Sample: 
+- Code:
+Detection:
+ - IOC: Jsc.exe should normally not run a system unless it is used for development. 
+Resources:
+  - Link: https://twitter.com/DissectMalware/status/998797808907046913
+  - Link: https://www.phpied.com/make-your-javascript-a-windows-exe/
+Acknowledgement:
+  - Person: Malwrologist
+    Handle: @DissectMalware
+---