Detection rules › Sigma

Potentially Suspicious File Creation by OpenEDR's ITSMService

Status
experimental
Severity
medium
Log source
category file_event, product windows
Author
@kostastsale
Source
github.com/SigmaHQ/sigma

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.

Known false positives

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

MITRE ATT&CK coverage

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 11: FileCreate

Rule body

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

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_process

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

Stage 2: selection_suspicious_extensions

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

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Imageends_with
  • \COMODO\Endpoint Manager\ITSMService.exe
field:"Image" kind:ends_with value:"\COMODO\Endpoint Manager\ITSMService.exe"
TargetFilenameends_with
  • .7z corpus 5 (sigma 5)
  • .bat corpus 17 (sigma 17)
  • .cmd corpus 8 (sigma 8)
  • .com corpus 4 (sigma 4)
  • .dll corpus 24 (sigma 24)
  • .exe corpus 21 (sigma 20, splunk 1)
  • .hta corpus 14 (sigma 14)
  • .js corpus 10 (sigma 10)
  • .pif
  • .ps1 corpus 17 (sigma 17)
  • .rar corpus 5 (sigma 5)
  • .scr corpus 8 (sigma 8)
  • .vbe corpus 16 (sigma 16)
  • .vbs corpus 18 (sigma 18)
  • .zip corpus 7 (sigma 6, splunk 1)
field:"TargetFilename" kind:ends_with