1type: trigger
2name: sigmahq/proc_creation_win_schtasks_appdata_local_system
3description: |
4  Detects the creation of a schtask that executes a file from C:\Users\<USER>\AppData\Local
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.Image endsWith '\\schtasks.exe' && evt.Parsed.CommandLine contains '/Create' && evt.Parsed.CommandLine contains '/RU' && evt.Parsed.CommandLine contains '/TR' && evt.Parsed.CommandLine contains 'C:\\Users\\' && evt.Parsed.CommandLine contains '\\AppData\\Local\\' && (evt.Parsed.CommandLine contains 'NT AUT' || evt.Parsed.CommandLine contains ' SYSTEM ') && not (evt.Parsed.ParentImage contains '\\AppData\\Local\\Temp\\' && evt.Parsed.ParentImage contains 'TeamViewer_.exe' && evt.Parsed.Image endsWith '\\schtasks.exe' && evt.Parsed.CommandLine contains '/TN TVInstallRestore'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1053.005
15   - attack.t1059.001
16
17  label: "Suspicious Schtasks Execution AppData Folder"
18  behavior : "windows:audit"
19  remediation: false
20
21scope:
22  type: ParentProcessId
23  expression: evt.Parsed.ParentProcessId
24
25