1type: trigger
2name: sigmahq/proc_creation_win_office_onenote_embedded_script_execution
3description: |
4  Detects the execution of malicious OneNote documents that contain embedded scripts. When a user clicks on a OneNote attachment and then on the malicious link inside the ".one" file, it exports and executes the malicious embedded script from specific directories. 
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.ParentImage endsWith '\\onenote.exe' && (evt.Parsed.Image endsWith '\\cmd.exe' || evt.Parsed.Image endsWith '\\cscript.exe' || evt.Parsed.Image endsWith '\\mshta.exe' || evt.Parsed.Image endsWith '\\powershell.exe' || evt.Parsed.Image endsWith '\\pwsh.exe' || evt.Parsed.Image endsWith '\\wscript.exe') && (evt.Parsed.CommandLine contains '\\exported\\' || evt.Parsed.CommandLine contains '\\onenoteofflinecache_files\\'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1218.001
15
16  label: "OneNote.EXE Execution of Malicious Embedded Scripts"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24