1type: trigger
2name: sigmahq/proc_creation_win_mpcmdrun_remove_windows_defender_definition
3description: |
4  Adversaries may disable security tools to avoid possible detection of their tools and activities by removing Windows Defender Definition Files
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\MpCmdRun.exe' || evt.Parsed.OriginalFileName == 'MpCmdRun.exe') && evt.Parsed.CommandLine contains ' -RemoveDefinitions' && evt.Parsed.CommandLine contains ' -All')
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1562.001
15
16  label: "Windows Defender Definition Files Removed"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24