An attacker logging straight into a corporate Windows workstation with a stolen password is one of the most common opening moves in modern attack scenarios. Passwords are harvested every single day through phishing, infostealer malware and credential-stuffing techniques.
The answer: add a verification layer on top of the password. That is exactly what the SignLogger Windows Login 2FA module does.
How Does SignLogger Windows Login 2FA Work?
- The user enters their username and password on the Windows sign-in screen.
- The password is validated by Active Directory.
- The SignLogger agent pauses the logon flow.
- A second factor is requested: a TOTP code, SMS, push notification or backup code.
- If verification succeeds, the Windows session opens.
The whole process finishes within seconds, and every failed 2FA attempt is logged centrally.
Which Scenarios Are Supported?
- Console logon: Ctrl+Alt+Del on the local machine.
- RDP (Remote Desktop): remote desktop sessions.
- Domain logon: for Active Directory members.
- Workgroup machines: local accounts on non-domain computers.
- RD Gateway: through the remote access endpoint.
Supported Verification Methods
- TOTP (RFC 6238): compatible with Google Authenticator, Microsoft Authenticator and Authy.
- SMS OTP: a one-time passcode sent to the registered mobile number.
- Push notification: an approval prompt in the mobile app.
- Backup code: pre-generated single-use codes for environments without internet access.
Which Windows Versions Are Supported?
- Windows 10 / 11 (all editions)
- Windows Server 2016, 2019, 2022 and 2025
- 32-bit and 64-bit architectures
Enterprise-Scale Deployment
The SignLogger Windows agent installs silently as an MSI through Active Directory Group Policy. No manual intervention is needed even in environments with 1,000+ clients.
- GPO-based rollout — your entire fleet in 30 minutes
- Centralized license and certificate management
- Support for a pilot-group-then-expand approach
- Users enroll their own mobile devices through a self-service portal
Compliance and Auditing
Every 2FA event is recorded in SignLogger's central log infrastructure. This gives you:
- detection of suspicious activity from failed 2FA attempts;
- provable access records under KVKK (Law No. 6698);
- evidence of 2FA for ISO 27001 and SOC 2 audits.