Remote Access Tool - Team Viewer Session Started On Windows Host

calendar Oct 23, 2025 · attack.persistence attack.initial-access attack.t1133  ·
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Detects the command line executed when TeamViewer starts a session started by a remote host. Once a connection has been started, an investigator can verify the connection details by viewing the "incoming_connections.txt" log file in the TeamViewer folder.

Sigma rule (View on GitHub)

 1title: Remote Access Tool - Team Viewer Session Started On Windows Host
 2id: ab70c354-d9ac-4e11-bbb6-ec8e3b153357
 3related:
 4    - id: 1f6b8cd4-3e60-47cc-b282-5aa1cbc9182d
 5      type: similar
 6    - id: f459ccb4-9805-41ea-b5b2-55e279e2424a
 7      type: similar
 8status: test
 9description: |
10    Detects the command line executed when TeamViewer starts a session started by a remote host.
11    Once a connection has been started, an investigator can verify the connection details by viewing the "incoming_connections.txt" log file in the TeamViewer folder.    
12references:
13    - Internal Research
14author: Josh Nickels, Qi Nan
15date: 2024-03-11
16tags:
17    - attack.persistence
18    - attack.initial-access
19    - attack.t1133
20logsource:
21    category: process_creation
22    product: windows
23detection:
24    selection:
25        Image: 'TeamViewer_Desktop.exe'
26        ParentImage: 'TeamViewer_Service.exe'
27        CommandLine|endswith: 'TeamViewer_Desktop.exe --IPCport 5939 --Module 1'
28    condition: selection
29falsepositives:
30    - Legitimate usage of TeamViewer
31level: low

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