1type: trigger
2name: sigmahq/proc_creation_win_pua_nsudo
3description: |
4  Detects the use of NSudo tool for command execution
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\NSudo.exe' || evt.Parsed.Image endsWith '\\NSudoLC.exe' || evt.Parsed.Image endsWith '\\NSudoLG.exe' || evt.Parsed.OriginalFileName in ['NSudo.exe', 'NSudoLC.exe', 'NSudoLG.exe']) && (evt.Parsed.CommandLine contains '-U:S ' || evt.Parsed.CommandLine contains '-U:T ' || evt.Parsed.CommandLine contains '-U:E ' || evt.Parsed.CommandLine contains '-P:E ' || evt.Parsed.CommandLine contains '-M:S ' || evt.Parsed.CommandLine contains '-M:H ' || evt.Parsed.CommandLine contains '-U=S ' || evt.Parsed.CommandLine contains '-U=T ' || evt.Parsed.CommandLine contains '-U=E ' || evt.Parsed.CommandLine contains '-P=E ' || evt.Parsed.CommandLine contains '-M=S ' || evt.Parsed.CommandLine contains '-M=H ' || evt.Parsed.CommandLine contains '-ShowWindowMode:Hide'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1569.002
15
16  label: "PUA - NSudo Execution"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24