code signing abuse

Code signing abuse involves the misuse of digital signatures to make malicious software appear legitimate. On WindowsForum.com, discussions cover attack chains like BazarLoader, which weaponized the Windows App Installer (ms-appinstaller/AppInstaller.exe) to deliver AppX packages that appeared signed and trustworthy. These attacks exploited living-off-the-land binaries such as regsvr32, PowerShell, and msedge to execute payloads, bypassing file-based detection. The tag highlights how attackers abuse legitimate code signing mechanisms to evade security controls, emphasizing the need for robust verification of digital signatures beyond surface-level checks.