Is it a Virus?
✔ NO - Safe
Typically located at C:\Program Files\Malwarebytes\MBAMService\MBAMService.exe
Warning
Many sync processes normal
Sync tasks may spawn multiple background processes during scheduled operations
Can I Disable?
✔ YES
Sync can be disabled from Malwarebytes Settings → Security → Synchronization (if your policy allows).
What is MBAMService.exe?
malwarebytes-sync is the synchronization component of Malwarebytes that keeps your device and Malwarebytes cloud account aligned. It transfers threat definitions, device status, and protection policies between the local client and the cloud so that your security posture remains consistent across all your devices.
MBAMService.exe runs the sync logic and uses TLS to talk to Malwarebytes cloud services, caching definitions locally and applying policy updates. It operates in the background and coordinates data exchange without requiring active UI.
Quick Fact: Malwarebytes Sync helps unify protections across multiple devices by exchanging settings and threat data with the central cloud.
Types of Malwarebytes Sync Processes
- Service Process: Main MBAMService handling coordination and auth
- Worker Process: Background worker for incremental sync tasks
- Cache/Data Process: Local cache for definitions and policy data
- Update Check Process: Checks for policy and definitions updates
- Comms Process: Handles TLS-enabled communication with cloud
- Telemetry/Logging Process: Captures sync events for diagnostics
Is malwarebytes-sync Safe?
Yes, malwarebytes-sync is safe when obtained from official Malwarebytes installation and used as part of the product.
Is malwarebytes-sync a Virus or Malware?
The real malwarebytes-sync is not a virus. Misleading samples may masquerade as it; always verify digital signature and source.
How to Tell if malwarebytes-sync is Legitimate or Malware
- File Location:: Should be in C:\Program Files\Malwarebytes\MBAMService\MBAMService.exe or C:\Program Files\Malwarebytes\Anti-Malware\MBAMService.exe
- Digital Signature:: Right-click the MBAMService.exe → Properties → Digital Signatures. Should show 'Malwarebytes Corporation' as signer.
- Resource Usage:: Normal activity is sporadic low CPU usage; sustained high usage when idle may indicate issue.
- Behavior:: Should run as a background service with user UI separated; no unexpected prompts or adware.
Red Flags: If MBAMService.exe is found outside the Malwarebytes installation folder, lacks a digital signature, or shows unusual network activity, scan with Malwarebytes and other security tools.
Why Is malwarebytes-sync Running on My PC?
malwarebytes-sync runs to keep protection and policy data aligned between your device and Malwarebytes cloud; it may operate even when you are not actively using Malwarebytes UI to ensure ongoing protection.
Reasons it's running:
- Active Protection Session: Sync engages during active protection or on-demand scans to verify protection state.
- Scheduled Sync: Regularly uploads telemetry and policy updates on a set interval.
- Cloud Policy Updates: New rules and definitions are pushed to the client via sync.
- Device Health Reporting: Sync helps report device health and status back to the console.
- Background Startup: The service may start at system boot to ensure protection is available when the system starts.
Can I Disable or Remove malwarebytes-sync?
Yes, you can disable malwarebytes-sync. Disabling sync stops cloud data exchange; protection remains local, but cross-device policies and updates won't be applied until re-enabled.
How to Stop malwarebytes-sync
- Disable Sync in UI: Open Malwarebytes, go to Settings → Security → Synchronization, and toggle off automatic sync.
- Quit UIs Cleanly: Close the Malwarebytes UI if open to ensure the setting takes effect.
- Stop Related Services: Open Services.msc, locate MBAMService, right-click Stop (if you are disabling permanently for troubleshooting).
- Prevent Startup: Task Scheduler or Startup tab in Task Manager: disable any scheduled sync task, and remove MBAM from startup.
- Stop Background Apps: In Malwarebytes settings, disable any option that continues to run in the background after closing the UI.
How to Uninstall Malwarebytes (which includes malwarebytes-sync)
- ✔ Windows Settings → Apps → Apps & Features → Malwarebytes → Uninstall
- ✔ Control Panel → Programs → Uninstall a program → Malwarebytes → Uninstall
- ✔ Follow prompts to remove the product completely; consider keeping a different security solution installed
Common Problems: Sync-Related Performance and Connectivity
If malwarebytes-sync is causing issues, try the following common resolutions to stabilize sync behavior and resource use.
Common Causes & Solutions
- Sync running too frequently: Adjust or disable automatic sync in the UI; review scheduled tasks and reduce frequency.
- High network usage during idle: Limit background data; ensure only essential telemetry is enabled and review firewall rules.
- Outdated Malwarebytes version: Update Malwarebytes to the latest version (Settings → Help → Check for updates).
- Corrupted sync cache: Clear the local sync cache from Malwarebytes data directory and restart the service.
- Interference from third-party security software: Temporarily disable conflicting security suites or add Malwarebytes to allowlist.
- DNS or network policy blocks: Verify DNS and corporate firewall rules allow outbound TLS to Malwarebytes cloud endpoints.
Quick Fixes:
1. Quick Fixes:
2. 1. Open Malwarebytes Task Manager (if available) and identify sync-related processes; end unnecessary ones.
3. Update Malwarebytes to the latest version.
4. Disable non-essential background features in Settings.
5. Check firewall/AV allowlists for Malwarebytes cloud endpoints.
6. Restart MBAMService and recheck sync status.
Frequently Asked Questions
What is malwarebytes-sync?
Malwarebytes-sync is the synchronization component that keeps threat data, policies, and device status aligned between the local Malwarebytes client and the cloud. It runs in the background to ensure cross-device protection.
Is malwarebytes-sync safe to have running on my PC?
Yes. It is a legitimate part of Malwarebytes and is digitally signed by Malwarebytes Corporation. Ensure it is located in the official installation path.
Where is malwarebytes-sync located on disk?
Typically at C:\Program Files\Malwarebytes\MBAMService\MBAMService.exe. Other components may reside under C:\Program Files\Malwarebytes\Anti-Malware\.
Can I disable malwarebytes-sync without removing Malwarebytes?
Yes. You can disable sync via the Malwarebytes UI under Settings → Security → Synchronization. This stops cloud data exchanges but does not remove on-device protection.
Will disabling sync affect real-time protection?
Disabling sync may prevent cross-device policy updates and cloud-backed features, but on-device protection remains active locally until re-enabled.
How do I fix high CPU usage from malwarebytes-sync?
Identify the specific sync task via Malwarebytes Task Manager, ensure the software is up to date, check for conflicting extensions or third-party security software, and adjust sync schedule.
Do I need an internet connection for malwarebytes-sync to function?
Yes. Sync relies on an internet connection to communicate with Malwarebytes cloud and receive policy updates and threat intelligence.