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PASSEDinfrastructure / rmm_agent_mass_disconnect
RMM Agent Mass Disconnect — Monitoring Blind Spot
A failed RMM platform update pushes a corrupt agent binary to all managed endpoints. The agent enters a crash loop on 400+ devices across 12 client organizations, leaving the MSP completely blind to endpoint health and unable to run remote management tasks.
Pattern
PROCESS_CRASH_LOOP
Severity
CRITICAL
Confidence
92%
Remediation
Remote Hands
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | PROCESS_CRASH_LOOP | PROCESS_CRASH_LOOP | |
| Severity Assessment | CRITICAL | CRITICAL | |
| Incident Correlation | Yes | 28 linked | |
| Cascade Escalation | Yes | Yes | |
| Remediation | — | Remote Hands — Corax contacts on-site support via call, email, or API |
Scenario Conditions
ConnectWise Automate RMM platform. Agent update v2024.3 pushed to all 400+ endpoints. Update contains corrupt DLL. Agent crash loop on Windows devices. 12 client orgs affected. No rollback mechanism in the agent.
Injected Error Messages (3)
RMM agent mass disconnect detected — 400+ agents went offline simultaneously after update push, ConnectWise Automate showing 0/412 agents online, agent crash loop detected on sampled endpoints, ltagent.exe crash loop with corrupt DLL fault, core dump in agent log directory
Client-A all 45 RMM agents in crash loop — ltagent.exe restarting every 10 seconds, crash loop count: 200+ per device, Event ID 1000 application crash in Windows Event Log, RMM monitoring and remote access completely offline
Client-B all 60 RMM agents crash loop — same corrupt DLL crash pattern, agents unable to phone home, crash loop preventing remote remediation, manual on-site intervention required for 60 devices
Neural Engine Root Cause Analysis
The RMM platform (ConnectWise Automate) experienced a catastrophic failure following an update push that corrupted core agent DLLs. The update deployed faulty binaries causing ltagent.exe to enter crash loops across 400+ managed endpoints simultaneously. This represents a bad update rollout that compromised the integrity of the agent software stack, resulting in complete loss of remote management capabilities across the entire client base.
Remediation Plan
1. Immediately halt any ongoing update deployments and disable automatic agent updates. 2. Roll back the Automate server to the previous known-good configuration/patch level. 3. Identify and quarantine the corrupted DLL files from the update package. 4. Deploy a hotfix or clean agent package to restore endpoints, potentially requiring manual intervention on critical systems. 5. Implement staged rollout procedures for future updates to prevent mass failures. 6. Verify agent connectivity restoration and perform health checks across all managed endpoints.
Tested: 2026-03-30Monitors: 3 | Incidents: 3Test ID: cmncjqsyh03tdobqe70epxgca