Query: detect Detects the use of reg.exe to disable the Event Tracing for Windows (ETW) Autologger session for Windows Defender API an in logs
Matching passage: Sigma rule: Detects the use of reg.exe to disable the Event Tracing for Windows (ETW) Autologger session for Windows Defender API an. Logsource: windows / process_creation. Rule: title: Disabling Windows Defender WMI Autologger Session via Reg.exe id: a1b2c3d4-e5f6-a7b8-c9d0-e1f2a3b4c5d6 related: - id: f37b4bce-49d0-4087-9f5b-58bffda77316 type: similar status: experimental description: 'Detects the use of reg.exe to disable the Event Tracing for Windows (ETW) Autologger session for Windows Defender API and Audit events. By setting the ''Start'' value to ''0'' for the ''DefenderApiLogger'' or ''DefenderAuditLogger'' session, an attacker can prevent these critical security events from being logged, effectively blinding monitoring tools that rely on this data. This is a powerful defense evasion technique. ' references: - https://research.splunk.com/endpoint/76406a0f-f5e0-4167-8e1f-337fdc0f1b0c/ - https://docs.microsoft.com/en-us/windows/win32/etw/configuring-and-starting-an-autologger-session - https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/ - https://blog.malwarebytes.com/malwarebytes-news/2021/02/lazyscripter-from-empire-to-double-rat/ - https://www.binarly.io/blog/design-issues-of-modern-edrs-bypassing-etw-based-solutions author: Matt Anderson (Huntress) date: 2025-07-09 tags: - attack.defense-impairment - attack.t1685 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \reg.exe - OriginalFileName: reg.exe selection_reg_path: CommandLine|contains: - \Control\WMI\Autologger\DefenderApiLogger\Start - \Control\WMI\Autologger\DefenderAuditLogger\Start selection_reg_add: CommandLine|contains|all: - add - '0' filter_main_enable: CommandLine|contains: '0x00000001' condition: all of selection_* and not 1 of filter_main_* falsepositives: - Highly unlikely level: high
Near-miss passage: Sigma rule: Detects PowerShell command line contents that include a suspicious abnormal casing in the Net.Webclient (e.g. nEt.WEbCli. Logsource: windows / process_creation. Rule: title: Net WebClient Casing Anomalies id: c86133ad-4725-4bd0-8170-210788e0a7ba status: test description: Detects PowerShell command line contents that include a suspicious abnormal casing in the Net.Webclient (e.g. nEt.WEbCliEnT) string as used in obfuscation techniques references: - https://app.any.run/tasks/b9040c63-c140-479b-ad59-f1bb56ce7a97/ author: Florian Roth (Nextron Systems) date: 2022-05-24 modified: 2023-01-05 tags: - attack.execution - attack.t1059.001 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \powershell.exe - \pwsh.exe - OriginalFileName: - PowerShell.EXE - pwsh.dll selection_encoded: CommandLine|contains: - TgBlAFQALgB3AEUAQg - 4AZQBUAC4AdwBFAEIA - OAGUAVAAuAHcARQBCA - bgBFAHQALgB3AGUAYg - 4ARQB0AC4AdwBlAGIA - uAEUAdAAuAHcAZQBiA - TgBFAHQALgB3AGUAYg - OAEUAdAAuAHcAZQBiA - bgBlAFQALgB3AGUAYg - 4AZQBUAC4AdwBlAGIA - uAGUAVAAuAHcAZQBiA - TgBlAFQALgB3AGUAYg - OAGUAVAAuAHcAZQBiA - bgBFAFQALgB3AGUAYg - 4ARQBUAC4AdwBlAGIA - uAEUAVAAuAHcAZQBiA - bgBlAHQALgBXAGUAYg - 4AZQB0AC4AVwBlAGIA - uAGUAdAAuAFcAZQBiA - bgBFAHQALgBXAGUAYg - 4ARQB0AC4AVwBlAGIA - uAEUAdAAuAFcAZQBiA - TgBFAHQALgBXAGUAYg - OAEUAdAAuAFcAZQBiA - bgBlAFQALgBXAGUAYg - 4AZQBUAC4AVwBlAGIA - uAGUAVAAuAFcAZQBiA - TgBlAFQALgBXAGUAYg - OAGUAVAAuAFcAZQBiA - bgBFAFQALgBXAGUAYg - 4ARQBUAC4AVwBlAGIA - uAEUAVAAuAFcAZQBiA - bgBlAHQALgB3AEUAYg - 4AZQB0AC4AdwBFAGIA - uAGUAdAAuAHcARQBiA - TgBlAHQALgB3AEUAYg - OAGUAdAAuAHcARQBiA - bgBFAHQALgB3AEUAYg - 4ARQB0AC4AdwBFAGIA - uAEUAdAAuAHcARQBiA - TgBFAHQALgB3AEUAYg - OAEUAdAAuAHcARQBiA - bgBlAFQALgB3AEUAYg - 4AZQBUAC4AdwBFAGIA - uAGUAVAAuAHcARQBiA - TgBlAFQALgB3AEUAYg - OAGUAVAAuAHcARQBiA - bgBFAFQALgB3AEUAYg - 4ARQBUAC4AdwBFAGIA - uAEUAVAAuAHcARQBiA - TgBFAFQALgB3AEUAYg - OAEUAVAAuAHcARQBiA - bgBlAHQALgBXAEUAYg - 4AZQB0AC4AVwBFAGIA - uAGUAdAAuAFcARQBiA - TgBlAHQALgBXAEUAYg - OAGUAdAAuAFcARQBiA - bgBFAHQALgBXAEUAYg - 4ARQB0AC4AVwBFAGIA - uAEUAdAAuAFcARQBiA - TgBFAHQALgBXAEUAYg - OAEUAdAAuAFcARQBiA - bgBlAFQALgBXAEUAYg - 4AZQBUAC4AVwBFAGIA - uAGUAVAAuAFcARQBiA - TgBlAFQALgBXAEUAYg - OAGUAVAAuAFcARQBiA - bgBFAFQALgBXAEUAYg - 4ARQBUAC4AVwBFAGIA - uAEUAVAAuAFcARQBiA - TgBFAFQALgBXAEUAYg - OAEUAVAAuAFcARQBiA - bgBlAHQALgB3AGUAQg - 4AZQB0AC4AdwBlAEIA - uAGUAdAAuAHcAZQBCA - TgBlAHQALgB3AGUAQg - OAGUAdAAuAHcAZQBCA - bgBFAHQALgB3AGUAQg - 4ARQB0AC4AdwBlAEIA - uAEUAdAAuAHcAZQBCA - TgBFAHQALgB3AGUAQg - OAEUAdAAuAHcAZQBCA - bgBlAFQALgB3AGUAQg - 4AZQBUAC4AdwBlAEIA - uAGUAVAAuAHcAZQBCA - TgBlAFQALgB3AGUAQg - OAGU