dnx.exe

Commands

1. ExecuteUser T1127

   Local execution of C# project stored in consoleapp folder.

   dnx.exe {PATH_ABSOLUTE:folder}

   Execute C# code located in the specified folder via ‘Program.cs’ and ‘Project.json’ (Note - Requires dependencies)

   os: Windows

   Execute: CSharp

Detection

• Sigma https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_lolbin_dnx.yml
• Elastic https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_unusual_process_network_connection.toml
• Elastic https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml
• BlockRule https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules

Resources

• https://enigma0x3.net/2016/11/17/bypassing-application-whitelisting-by-using-dnx-exe/