Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server

Hunt Hypothesis

Detects TacticalRMM agent installations where the —api, —auth, and related flags are used on the command line. These parameters configure the agent to connect to a specific RMM server with authentic

Detection Rule

Sigma (Original)

title: Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server
id: 2db93a3f-3249-4f73-9e68-0e77a0f8ae7e
status: experimental
description: |
    Detects TacticalRMM agent installations where the --api, --auth, and related flags are used on the command line.
    These parameters configure the agent to connect to a specific RMM server with authentication, client ID, and site ID.
    This technique could indicate a threat actor attempting to register the agent with an attacker-controlled RMM infrastructure silently.
references:
    - https://github.com/amidaware/tacticalrmm
    - https://apophis133.medium.com/powershell-script-tactical-rmm-installation-45afb639eff3
author: Ahmed Nosir (@egycondor)
date: 2025-05-29
tags:
    - attack.command-and-control
    - attack.t1219
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|contains: '\TacticalAgent\tacticalrmm.exe'
        CommandLine|contains|all:
            - '--api'
            - '--auth'
            - '--client-id'
            - '--site-id'
            - '--agent-type'
    condition: selection
falsepositives:
    - Legitimate system administrator deploying TacticalRMM
level: medium

KQL (Azure Sentinel)

imProcessCreate
| where TargetProcessName contains "\\TacticalAgent\\tacticalrmm.exe" and (TargetProcessCommandLine contains "--api" and TargetProcessCommandLine contains "--auth" and TargetProcessCommandLine contains "--client-id" and TargetProcessCommandLine contains "--site-id" and TargetProcessCommandLine contains "--agent-type")

Required Data Sources

False Positive Guidance

• Legitimate system administrator deploying TacticalRMM

MITRE ATT&CK Context

• Tactic: Command and Control
• Technique: T1219 — T1219
• Technique: T1105 — T1105

References

• https://github.com/amidaware/tacticalrmm
• https://apophis133.medium.com/powershell-script-tactical-rmm-installation-45afb639eff3
• SigmaHQ Rule