Windows-Defender

A critical local race condition (EDB-52612) exists in Microsoft Windows Defender's MsMpEng.exe, specifically between its cleanup routine (`MpCleanCallbackFunction`) and Volume Shadow Copy creation, allowing Local Privilege Escalation (LPE) to NT AUTHORITY\SYSTEM and temporary disabling of antivirus protection through a use-after-free vulnerability, with a public exploit demonstrating the risk.

A technique brief describes how adversaries may use `wmic.exe` to tamper with Windows Defender settings, specifically to add exclusions via the `\root\Microsoft\Windows\Defender` WMI namespace, reducing the host's security posture and enabling further malicious activity.

An attacker modifies the Windows registry to disable Windows Defender Controlled Folder Access, a defense evasion technique that weakens protections against unauthorized access and ransomware.

A PowerShell command attempting to remove the Windows Defender directory is detected via PowerShell Script Block Logging, potentially indicating an attacker's attempt to disable endpoint protection for further malicious activities.

Attackers modify the Windows Registry to disable the Windows Defender Submit Samples Consent feature, preventing sample submission for analysis and enabling potential system compromise.

An attacker disables Windows Defender's signature retirement feature by modifying a registry key, potentially reducing its effectiveness in detecting threats by allowing older, less relevant signatures to persist.

An attacker modifies the Windows registry to disable the Windows Defender Scan On Update feature, potentially evading detection and establishing persistence.

The following analytic detects modifications to the Windows registry that disable the Windows Defender real-time signature delivery feature, preventing timely malware definition updates and potentially leading to system compromise.

Attackers disable Windows Defender Network Protection by modifying the `EnableNetworkProtection` registry value, potentially bypassing network-based threat detection and enabling data exfiltration or further system compromise.

An attacker modifies the Windows Defender MpEngine registry value to disable key features, potentially allowing malware to evade detection.

Attackers may disable Windows Defender's ability to compute file hashes by modifying the EnableFileHashComputation registry value, impairing its malware detection capabilities.

An attacker can potentially evade Windows Defender by manipulating Protected Process Light (PPL) attributes, allowing malicious processes to operate with elevated privileges and avoid security scans.

An attacker modifies the Windows Registry to disable Windows Defender's Enhanced Notification feature, preventing users from receiving security alerts and potentially allowing malicious activities to go unnoticed, ultimately enabling persistence and evasion.

This analytic detects a Windows registry modification that disables the Windows Defender Controlled Folder Access feature, potentially allowing attackers to bypass a key security control and gain unauthorized access to sensitive files.

Adversaries tamper with Windows Defender's Attack Surface Reduction (ASR) rules or threat default actions using Add-MpPreference or Set-MpPreference commands, aiming to bypass the security tool for undetected malicious code execution.

Attackers are using PowerShell commands with specific Set-MpPreference parameters to disable Windows Defender's real-time behavior monitoring, a common tactic for malware to evade detection and persist on compromised systems.

An attacker modifies the Windows registry to disable the Windows Defender Submit Samples Consent feature, preventing the submission of suspicious files for analysis, and potentially evading detection.

Detection of modifications to the Windows registry that change the Windows Defender Quick Scan Interval, potentially impairing its ability to detect malware promptly.

Attackers use PowerShell commands with `Add-MpPreference` or `Set-MpPreference` to create Windows Defender exclusions, allowing malware to execute undetected.

This analytic identifies attempts to disable Windows Defender real-time behavior monitoring via PowerShell commands using `Set-MpPreference`, commonly used by malware to evade detection and potentially leading to data exfiltration or system compromise.