Windows Windefend: Defender Restored File from Quarantine (EventID 1009)

Alerts on Windows Defender Windefend events indicating an item was restored from quarantine (Event ID 1009).

FreeReviewedSigma · High · v2

Product: windows
Service: windefend
Author: Nasreddine Bencherchali (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2022-12-06
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags Windows Microsoft Defender (Windefend) events where the antimalware platform restored an item from quarantine. Attackers and defenders both may trigger this when artifacts are moved back to active locations after being quarantined, so repeated or unexpected restorations can indicate defense impairment or operational recovery. It relies on Windefend telemetry, specifically EventID 1009, to identify the restore action.

Reporting behind it

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Windows Windefend: Defender Restored File from Quarantine (EventID 1009)

Pivot detection · T1685 · 9 related

Changelog

v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

windows-windefend-antimalware-restores-file-from-quarantine-event-id-1009-bc92ca75

title: "Windows Windefend: Defender Restored File from Quarantine (EventID 1009)"
id: 22331656-02ba-4453-bef0-ba938445cd6b
status: test
description: This rule flags Windows Microsoft Defender (Windefend) events where the antimalware platform restored an item from quarantine. Attackers and defenders both may trigger this when artifacts are moved back to active locations after being quarantined, so repeated or unexpected restorations can indicate defense impairment or operational recovery. It relies on Windefend telemetry, specifically EventID 1009, to identify the restore action.
references:
  - https://learn.microsoft.com/en-us/defender-endpoint/troubleshoot-microsoft-defender-antivirus?view=o365-worldwide
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/builtin/windefend/win_defender_restored_quarantine_file.yml
author: Nasreddine Bencherchali (Nextron Systems), Huntrule Team
date: 2022-12-06
tags:
  - attack.defense-impairment
  - attack.t1685
logsource:
  product: windows
  service: windefend
detection:
  selection:
    EventID: 1009
  condition: selection
falsepositives:
  - Legitimate administrator activity restoring a file
level: high
license: DRL-1.1
related:
  - id: bc92ca75-cd42-4d61-9a37-9d5aa259c88b
    type: derived

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