huntrule

Windows Uninstall CrowdStrike Falcon Sensor via WindowsSensor.exe /uninstall /quiet

Flags Windows processes uninstalling CrowdStrike Falcon Sensor using WindowsSensor.exe with /uninstall and /quiet.

FreeReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
frack113 (SigmaHQ), DRL 1.1
Published
2021-07-12
Updated
2026-07-30
AnalysisDetection

ATT&CK techniques

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule matches process creation events where the command line contains WindowsSensor.exe along with /uninstall and /quiet, indicating an attempt to remove the CrowdStrike Falcon Sensor without user interaction. Disabling or uninstalling security tooling can reduce detection and monitoring coverage, helping an attacker avoid visibility. It relies on Windows process creation telemetry with command-line fields to identify the specific uninstall pattern.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange
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Suspicious Windows Defender Exclusion via Add-MpPreference (via process_creation)
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Windows Defender Disabled via DisableAntiSpyware Registry Key
Suspicious Vulnerable Intel Ethernet Driver Load for BYOVD via SCATTERED SPIDER (via driver_load)
Malicious Defender Disable And Executable Exclusion Via Registry
Malicious UAC Disable via EnableLUA Registry Modification (via registry_set)
Malicious AMSI and ETW Patching via PowerShell Script
Malicious PowMix AMSI Bypass via amsiInitFailed
Windows Uninstall CrowdStrike Falcon Sensor via WindowsSensor.exe /uninstall /quiet
Pivot detection · T1685 · 9 related

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