Fundamentals

Microsoft Access VBA

SANS ISC handler Didier Stevens explores the security implications of Visual Basic for Applications (VBA) macros within Microsoft Access databases, a vector that often receives less attention than Office document macros. The analysis covers how Access VBA macros can be weaponized by attackers to execute arbitrary code, establish persistence, or move laterally within Windows environments. Despite Microsoft's efforts to harden Office macro security, Access databases with embedded VBA remain a viable attack path, particularly in organizations with legacy business applications built on Access. Stevens' research serves as a reminder that security teams should inventory and control Access database usage, apply macro signing requirements, and consider migrating legacy Access applications to more secure platforms.

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Overview

  • SANS ISC handler Didier Stevens explores the security implications of Visual Basic for Applications (VBA) macros within Microsoft Access databases, a vector that often receives less attention than Office document macros.
  • The analysis covers how Access VBA macros can be weaponized by attackers to execute arbitrary code, establish persistence, or move laterally within Windows environments.
  • Despite Microsoft’s efforts to harden Office macro security, Access databases with embedded VBA remain a viable attack path, particularly in organizations with legacy business applications built on Access.
  • Stevens’ research serves as a reminder that security teams should inventory and control Access database usage, apply macro signing requirements, and consider migrating legacy Access applications to more secure platforms.

Sources