Windows Security 4697 Alert for Obfuscated PowerShell Invoke via VAR++ LAUNCHER

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
- T1027Obfuscated Files or Information
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags Windows Security event ID 4697 where the recorded ServiceFileName contains patterns indicative of obfuscated PowerShell execution using VAR++ LAUNCHER techniques. Attackers may use this obfuscation to hinder detection and analysis while launching PowerShell payloads. The detection relies on Security audit telemetry that logs event 4697 along with the ServiceFileName string content for matching substrings.

Reporting behind it

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Windows Security 4697 Alert for Obfuscated PowerShell Invoke via VAR++ LAUNCHER

Pivot detection · T1027 · 9 related

Changelog

v2

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-security-4697-detects-var-launcher-obfuscated-powershell-in-servicefilen-4c54ba8f

title: Windows Security 4697 Alert for Obfuscated PowerShell Invoke via VAR++ LAUNCHER
id: b180f0c5-7296-4075-af53-ef34895c4e76
related:
  - id: 14bcba49-a428-42d9-b943-e2ce0f0f7ae6
    type: derived
  - id: 4c54ba8f-73d2-4d40-8890-d9cf1dca3d30
    type: derived
status: test
description: This rule flags Windows Security event ID 4697 where the recorded ServiceFileName contains patterns indicative of obfuscated PowerShell execution using VAR++ LAUNCHER techniques. Attackers may use this obfuscation to hinder detection and analysis while launching PowerShell payloads. The detection relies on Security audit telemetry that logs event 4697 along with the ServiceFileName string content for matching substrings.
references:
  - https://github.com/SigmaHQ/sigma/issues/1009
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/builtin/security/win_security_invoke_obfuscation_via_var_services_security.yml
author: Timur Zinniatullin, oscd.community, Huntrule Team
date: 2020-10-13
modified: 2022-11-29
tags:
  - attack.stealth
  - attack.t1027
  - attack.execution
  - attack.t1059.001
logsource:
  product: windows
  service: security
  definition: The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697
detection:
  selection:
    EventID: 4697
    ServiceFileName|contains|all:
      - "&&set"
      - cmd
      - /c
      - -f
    ServiceFileName|contains:
      - "{0}"
      - "{1}"
      - "{2}"
      - "{3}"
      - "{4}"
      - "{5}"
  condition: selection
falsepositives:
  - Unknown
level: high
license: DRL-1.1

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