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

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-253bba91117c, updated 2025-05-29T00:00:00.000Z.

Rule

Title
Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server
Status
experimental
Level
medium
Author
Ahmed Nosir (@egycondor)
Date
2025-05-29
File
rules/windows/process_creation/proc_creation_win_remote_access_tools_tacticalrmm_agent_registration_via_cli.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

product
windows
category
process_creation

Detection

selection:
    Image|contains: '\TacticalAgent\tacticalrmm.exe'
    CommandLine|contains|all:
        - '--api'
        - '--auth'
        - '--client-id'
        - '--site-id'
        - '--agent-type'
condition: selection

False positives (as the rule lists them)

  • Legitimate system administrator deploying TacticalRMM

Tags

  • attack.command-and-control
  • attack.t1219
  • attack.t1105

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_remote_access_tools_tacticalrmm_agent_registration_via_cli.yml

Sources and licences

  • SigmaHQ

    "Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server" by Ahmed Nosir (@egycondor) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_remote_access_tools_tacticalrmm_agent_registration_via_cli.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Remote Access Tool - TacticalRMM Agent Registration to Potentially Attacker-Controlled Server",
entity page, dataset version ref-253bba91117c, updated 2025-05-29T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/2db93a3f-3249-4f73-9e68-0e77a0f8ae7e (accessed 2026-11-03).
Underlying source: SigmaHQ rule 2db93a3f-3249-4f73-9e68-0e77a0f8ae7e, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.