Trend Micro Deep Security Anti-malware Driver Offline Not Installed [new] | Top ★ |

Seeing the error "Anti-Malware Driver offline/Not installed" in Trend Micro Deep Security usually means the agent’s core protection module has failed to initialize or has been blocked . This status leaves your server vulnerable as the agent cannot monitor or block malicious activity. Why Is This Happening? Corrupted Installation: The most common cause is a failed or incomplete installation of the Deep Security Agent (DSA) . Missing Root Certificates: On Windows, the OS may lack the necessary CA certificates to verify the driver's digital signature, preventing it from loading. Security Software Conflicts: Existing antivirus programs like Trend Micro OfficeScan or third-party AVs can block the DSA driver installation. Secure Boot Issues: For Linux systems, Secure Boot may be enabled without the proper public key enrolled for the Trend Micro driver. How to Fix It (Step-by-Step) 1. The "Clean Slate" Method (Recommended) Since corrupted files often cause this, a clean reinstall is usually the fastest fix. Deactivate the agent in the Deep Security Manager (DSM) . Uninstall the Deep Security Agent from the affected machine. Manual Cleanup: Open a Command Prompt as Admin and ensure these driver services are fully removed: sc delete tmactmon sc delete tmcomm sc delete tmevtmgr Reboot the server to clear remaining hooks. Reinstall the agent and reactivate it from the Manager. 2. Verify OS Environment If a reinstall fails, the underlying OS might be blocking the driver: Windows Updates: Ensure the server has the latest Microsoft root certificate updates so it can trust Trend Micro’s signed drivers. Conflict Check: Remove any old OfficeScan/Apex One clients or third-party AV agents before installing Deep Security. Secure Boot (Linux): If using Linux, either disable Secure Boot or enroll the Trend Micro public key. 3. Agentless Protection (VMware/NSX) If you are seeing this error in a virtual environment using agentless protection: Verify that Guest Introspection is installed and running in your vSphere/NSX environment . Check that the VMware Tools are up to date and compatible with your Deep Security version. For deeper troubleshooting, you can generate a Diagnostic Package from the Agent to send to Trend Micro Support . Anti-Malware: Driver offline / Not installed - Deep Security

Resolved: “Trend Micro Deep Security Anti-Malware Driver Offline Not Installed” – Causes and Fixes Introduction: A Critical Alert for Virtualized Environments For system administrators managing hybrid data centers or large-scale virtualized environments (VMware, Hyper-V, or AWS), Trend Micro Deep Security is a cornerstone of workload protection. Its "Agentless Anti-Malware" feature is particularly prized because it offloads scanning responsibilities to the hypervisor, saving memory and CPU cycles on individual virtual machines (VMs). However, a common and frustrating error message can appear in the Deep Security Manager (DSM) console or event logs:

"Anti-Malware Driver Offline – Not Installed"

This alert typically appears with an orange or yellow warning triangle on the "Overview" or "Computer" tab. What makes this issue particularly perplexing is that it often happens offline —meaning the VM is powered on and appears functional, but the driver is either missing, corrupt, or disabled. If you are seeing this status, your VMs are not protected against malware. This article explains exactly why this happens and provides a step-by-step guide to resolve it. Part 1: Understanding the “Anti-Malware Driver” in Deep Security Before troubleshooting, it is crucial to understand the architecture. Agentless vs. Agent-Based Protection Corrupted Installation: The most common cause is a

Agent-based: A small software client runs inside the guest OS. The anti-malware driver is loaded as a kernel module (e.g., tmcomm.sys on Windows). Agentless (vSphere/Hyper-V): No software runs inside the VM. Instead, a security VM (Deep Security Virtual Appliance – DSVA) uses hypervisor APIs to scan files. The "driver" in this context is actually a mapping within the hypervisor.

What Does “Offline Not Installed” Mean? When you see this status, one of three conditions is true:

The anti-malware driver is missing from the VM’s operating system (agent-based deployments). The hypervisor integration service (VMware Tools/Hyper-V Integration Services) is not running or outdated. The Deep Security Virtual Appliance (DSVA) cannot communicate with the ESXi host or Hyper-V server. Secure Boot Issues: For Linux systems, Secure Boot

The word "offline" is key. It does not mean the VM is powered off. It means the driver service is not responding to DSM heartbeats. Part 2: Common Root Causes (Why This Happens) 1. Outdated or Missing VMware Tools / Hyper-V Integration Services The anti-malware driver relies on the hypervisor’s file system filter. If VMware Tools is not installed or is severely outdated, the driver cannot be injected. In Hyper-V environments, the Linux Integration Services (LIS) or Windows Integration Components may be missing. 2. Windows Update Conflicts (Kernel Patch Tuesday) After a Microsoft Patch Tuesday, a Windows kernel update may change the filter manager structure. If the Trend Micro driver ( tmebc.sys , tmcomm.sys ) was compiled for an older kernel version, it will fail to load. The agent shows as "online," but the anti-malware driver remains offline. 3. Corrupted Trend Micro Driver Registry Keys (Windows) In agent-based deployments, the driver’s start type may be set to Disabled (0x4) or Demand Start (0x3) instead of Boot Start (0x0). This prevents it from loading before the file system initializes. 4. Secure Boot or Driver Signing Policy Modern Windows Server 2019/2022 and Linux distributions with UEFI Secure Boot may block unsigned or improperly signed kernel drivers. If Trend Micro’s certificate is not trusted, the driver stays offline. 5. DSVA (Deep Security Virtual Appliance) Network Segmentation For agentless deployments, the DSVA must have network access to the ESXi host’s management IP and the VM’s storage (via vMotion network). If firewalls block ports (e.g., TCP 443, 4120), the driver status appears offline. Part 3: Step-by-Step Troubleshooting Guide Follow these steps in order. Start with the least invasive checks. Step 1: Verify Hypervisor Integration Tools For VMware:

Open vSphere Client → VM → Summary. Check "VMware Tools" status. It must say "Running (Current)" . If outdated, right-click VM → Guest OS → Upgrade VMware Tools. Reboot the VM.

For Hyper-V:

Open Hyper-V Manager → VM → Settings → Integration Services. Ensure all services (especially "Heartbeat" and "Guest Service Interface") are checked. Inside the VM, verify C:\Windows\System32\vmictimeprovider.dll exists.

Step 2: Check the Driver Service Status (Windows Only) Connect to the affected VM (via RDP or console) and run PowerShell as Administrator: Get-Service | Where-Object {$_.Name -like "*tm*" -or $_.Name -like "*trend*"}