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T1070.001 Clear Windows Event Logs

Adversaries may clear Windows Event Logs to hide the activity of an intrusion. Windows Event Logs are a record of a computer’s alerts and notifications. There are three system-defined sources of events: System, Application, and Security, with five event types: Error, Warning, Information, Success Audit, and Failure Audit.

The event logs can be cleared with the following utility commands:

  • wevtutil cl system
  • wevtutil cl application
  • wevtutil cl security

These logs may also be cleared through other mechanisms, such as the event viewer GUI or PowerShell. For example, adversaries may use the PowerShell command Remove-EventLog -LogName Security to delete the Security EventLog and after reboot, disable future logging. Note: events may still be generated and logged in the .evtx file between the time the command is run and the reboot.1

Item Value
ID T1070.001
Sub-techniques T1070.001, T1070.002, T1070.003, T1070.004, T1070.005, T1070.006, T1070.007, T1070.008, T1070.009
Tactics TA0005
Platforms Windows
Version 1.2
Created 28 January 2020
Last Modified 12 April 2023

Procedure Examples

ID Name Description
G0007 APT28 APT28 has cleared event logs, including by using the commands wevtutil cl System and wevtutil cl Security.630
G0050 APT32 APT32 has cleared select event log entries.26
G0082 APT38 APT38 clears Window Event logs and Sysmon logs from the system.27
G0096 APT41 APT41 attempted to remove evidence of some of its activity by clearing Windows security and system events.31
S1068 BlackCat BlackCat can clear Windows event logs using wevtutil.exe.14
S0089 BlackEnergy The BlackEnergy component KillDisk is capable of deleting Windows Event Logs.10
G0114 Chimera Chimera has cleared event logs on compromised hosts.34
G0035 Dragonfly Dragonfly has cleared Windows event logs and other logs produced by tools they used, including system, security, terminal services, remote services, and audit logs. The actors also deleted specific Registry keys.32
G0053 FIN5 FIN5 has cleared event logs from victims.28
G0061 FIN8 FIN8 has cleared logs during post compromise cleanup activities.29
S0182 FinFisher FinFisher clears the system event logs using OpenEventLog/ClearEventLog APIs .2021
S0032 gh0st RAT gh0st RAT is able to wipe event logs.1112
S0697 HermeticWiper HermeticWiper can overwrite the C:\Windows\System32\winevt\Logs file on a targeted system.15
S0698 HermeticWizard HermeticWizard has the ability to use wevtutil cl system to clear event logs.15
S0203 Hydraq Hydraq creates a backdoor through which remote attackers can clear all system event logs.2425
G0119 Indrik Spider Indrik Spider has used Cobalt Strike to empty log files.33
S0607 KillDisk KillDisk deletes Application, Security, Setup, and System Windows Event Logs.10
S0532 Lucifer Lucifer can clear and remove event logs.22
S1060 Mafalda Mafalda can delete Windows Event logs by invoking the OpenEventLogW and ClearEventLogW functions.19
S0688 Meteor Meteor can use Wevtutil to remove Security, System and Application Event Viewer logs.18
S0368 NotPetya NotPetya uses wevtutil to clear the Windows event logs.89
S0365 Olympic Destroyer Olympic Destroyer will attempt to clear the System and Security event logs using wevtutil.17
C0014 Operation Wocao During Operation Wocao, the threat actors deleted all Windows system and security event logs using /Q /c wevtutil cl system and /Q /c wevtutil cl security.35
S0192 Pupy Pupy has a module to clear event logs with PowerShell.7
S0253 RunningRAT RunningRAT contains code to clear event logs.13
S0242 SynAck SynAck clears event logs.16
S0645 Wevtutil Wevtutil can be used to clear system and security event logs from the system.56
S0412 ZxShell ZxShell has a command to clear system event logs.23


ID Mitigation Description
M1041 Encrypt Sensitive Information Obfuscate/encrypt event files locally and in transit to avoid giving feedback to an adversary.
M1029 Remote Data Storage Automatically forward events to a log server or data repository to prevent conditions in which the adversary can locate and manipulate data on the local system. When possible, minimize time delay on event reporting to avoid prolonged storage on the local system.
M1022 Restrict File and Directory Permissions Protect generated event files that are stored locally with proper permissions and authentication and limit opportunities for adversaries to increase privileges by preventing Privilege Escalation opportunities.


ID Data Source Data Component
DS0017 Command Command Execution
DS0022 File File Deletion
DS0009 Process OS API Execution


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