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Remote Access Tool - ScreenConnect Temporary File — Sigma Rule

Sigma rule 0afecb6e-6223-4a82-99fb-bf5b981e92a5. Remote Access Tool - ScreenConnect Temporary File — Sigma Rule. Detects the creation of files in a specific location by ScreenConnect RMM. ScreenConnect has feature to remotely execute binaries on a target machine. These binaries will be dropped to ":\Users\<username>\Documents\ConnectWiseControl\Temp\" before execution.

Rule metadata and linked tags

testlowfile_eventwindowsattack.executionattack.t1059.003

Author: Ali Alwashali. Source status: test; severity: low. Source dates: 2023-10-10 / not supplied.

{
  "category": "file_event",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: cfafb63825f4d48e58b1552b641991d3b98334767458572c06805a8e66aa5273

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Remote Access Tool - ScreenConnect Temporary File
id: 0afecb6e-6223-4a82-99fb-bf5b981e92a5
related:
    - id: b1f73849-6329-4069-bc8f-78a604bb8b23
      type: similar
status: test
description: |
    Detects the creation of files in a specific location by ScreenConnect RMM.
    ScreenConnect has feature to remotely execute binaries on a target machine. These binaries will be dropped to ":\Users\<username>\Documents\ConnectWiseControl\Temp\" before execution.
references:
    - https://github.com/SigmaHQ/sigma/pull/4467
author: Ali Alwashali
date: 2023-10-10
tags:
    - attack.execution
    - attack.t1059.003
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|endswith: '\ScreenConnect.WindowsClient.exe'
        TargetFilename|contains: '\Documents\ConnectWiseControl\Temp\'
    condition: selection
falsepositives:
    - Legitimate use of ScreenConnect
# Note: Incase the level if ScreenConnect is not used
level: low

Original YAML and metadata in JSON

False positives

  • Legitimate use of ScreenConnect

Source references

Connected ecosystem references

Exact source-tagged techniques

Telemetry review

Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.