ESC (Evil SQL Client) is an interactive .NET SQL console client designed for SQL Server discovery, access, and data exfiltration during security assessments. The tool provides enhanced capabilities for targeting SQL Servers in penetration testing and red team scenarios. It functions as both a standard SQL client for routine database tasks and a specialized security testing tool. ESC offers multiple execution methods including standalone executable format, MSBuild integration, and PowerShell execution. The client includes features for SQL Server enumeration and discovery across network environments. The tool supports data exfiltration capabilities and provides an interactive console interface for SQL operations. It is built on the .NET framework and can be deployed through various attack vectors during security engagements.