// MITRE ATT&CK
T1547.004 · Winlogon Helper DLL
Sub-technique of T1547 · Boot or Logon Autostart Execution.
Adversaries may abuse features of Winlogon to execute DLLs and/or executables when a user logs in. Winlogon.exe is a Windows component responsible for actions at logon/logoff as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete. Registry entries in HKLM\Software[\\Wow643...
How to detect & mitigate it
Detecting Winlogon Helper DLL starts with your SIEM/EDR telemetry. Write a detection rule with the Sigma generator, analyze suspicious logs in the log analyzer, and place the technique on your coverage with the ATT&CK matrix.
Related techniques
T1037
Boot or Logon Initialization Scripts T1543
Create or Modify System Process T1133
External Remote Services T1547
Boot or Logon Autostart Execution T1547.014
Active Setup T1176.001
Browser Extensions T1543.003
Windows Service T1137
Office Application Startup
Boot or Logon Initialization Scripts T1543
Create or Modify System Process T1133
External Remote Services T1547
Boot or Logon Autostart Execution T1547.014
Active Setup T1176.001
Browser Extensions T1543.003
Windows Service T1137
Office Application Startup
Source: MITRE ATT&CK®. ATT&CK is a registered trademark of The MITRE Corporation. Content for educational purposes.