title: Suspicious eventlog clear or configuration using wevtutil
description: Detects clearing or configuration of eventlogs uwing wevtutil. Might be used by ransomwares during the attack (seen by NotPetya and others)
author: Ecco
date: 2019/09/26
tags:
    - attack.execution
    - attack.t1070  
    - car.2016-04-002  
level: high
logsource:
    category: process_creation
    product: windows
detection:
    selection_binary_1:
        Image: '*\wevtutil.exe'
    selection_binary_2:
        OriginalFileName: 'wevtutil.exe'
    selection_clear_1:
        CommandLine: '* cl *'
    selection_clear_2:
        CommandLine: '* clear-log *'
    selection_disable_1:
        CommandLine: '* sl *'
    selection_disable_2:
        CommandLine: '* set-log *'
    condition: (1 of selection_binary_*) and (1 of selection_clear_* or 1 of selection_disable_*)
    
falsepositives:
    - Admin activity
    - Scripts and administrative tools used in the monitored environment