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

calendar Sep 22, 2025 · attack.command-and-control attack.t1219 attack.t1105  ·
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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.

Sigma rule (View on GitHub)

 1title: Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server
 2id: 2db93a3f-3249-4f73-9e68-0e77a0f8ae7e
 3status: experimental
 4description: |
 5    Detects TacticalRMM agent installations where the --api, --auth, and related flags are used on the command line.
 6    These parameters configure the agent to connect to a specific RMM server with authentication, client ID, and site ID.
 7    This technique could indicate a threat actor attempting to register the agent with an attacker-controlled RMM infrastructure silently.    
 8references:
 9    - https://github.com/amidaware/tacticalrmm
10    - https://apophis133.medium.com/powershell-script-tactical-rmm-installation-45afb639eff3
11author: Ahmed Nosir (@egycondor)
12date: 2025-05-29
13tags:
14    - attack.command-and-control
15    - attack.t1219
16    - attack.t1105
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection:
22        Image|contains: '\TacticalAgent\tacticalrmm.exe'
23        CommandLine|contains|all:
24            - '--api'
25            - '--auth'
26            - '--client-id'
27            - '--site-id'
28            - '--agent-type'
29    condition: selection
30falsepositives:
31    - Legitimate system administrator deploying TacticalRMM
32level: medium

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