Sigma Rule Library

Potentially Suspicious File Creation by OpenEDR's ITSMService

Detects the creation of potentially suspicious files by OpenEDR's ITSMService process. The ITSMService is responsible for remote management operations and can create files on the system through the Process Explorer or file management features. While legitimate for IT operations, creation of executable or script files could indicate unauthorized file uploads, data staging, or malicious file deployment.

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Detection logic

selection_process

Image|endswith: \COMODO\Endpoint Manager\ITSMService.exe

selection_suspicious_extensions

TargetFilename|endswith:
  - .7z
  - .bat
  - .cmd
  - .com
  - .dll
  - .exe
  - .hta
  - .js
  - .pif
  - .ps1
  - .rar
  - .scr
  - .vbe
  - .vbs
  - .zip

Condition

all of selection_*

Raw YAML

title: Potentially Suspicious File Creation by OpenEDR's ITSMService
id: 9e4b7d3a-6f2c-4e9a-8d1b-3c5e7a9f2b4d
status: experimental
description: |
    Detects the creation of potentially suspicious files by OpenEDR's ITSMService process.
    The ITSMService is responsible for remote management operations and can create files on the system through the Process Explorer or file management features.
    While legitimate for IT operations, creation of executable or script files could indicate unauthorized file uploads, data staging, or malicious file deployment.
author: '@kostastsale'
date: 2026-02-19
references:
    - https://kostas-ts.medium.com/detecting-abuse-of-openedrs-permissive-edr-trial-a-security-researcher-s-perspective-fc55bf53972c
tags:
    - attack.command-and-control
    - attack.t1105
    - attack.lateral-movement
    - attack.t1570
    - attack.t1219
logsource:
    product: windows
    category: file_event
detection:
    selection_process:
        Image|endswith: '\COMODO\Endpoint Manager\ITSMService.exe'
    selection_suspicious_extensions:
        TargetFilename|endswith:
            - '.7z'
            - '.bat'
            - '.cmd'
            - '.com'
            - '.dll'
            - '.exe'
            - '.hta'
            - '.js'
            - '.pif'
            - '.ps1'
            - '.rar'
            - '.scr'
            - '.vbe'
            - '.vbs'
            - '.zip'
    condition: all of selection_*
falsepositives:
    - Legitimate OpenEDR file management operations
    - Authorized remote file uploads by IT administrators
    - Software deployment through OpenEDR console
level: medium

False positives

  • Legitimate OpenEDR file management operations
  • Authorized remote file uploads by IT administrators
  • Software deployment through OpenEDR console

References

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