Detection rules › Sigma
Whoami.EXE Execution From Privileged Process
Detects the execution of "whoami.exe" by privileged accounts that are often abused by threat actors
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Discovery | T1033 System Owner/User Discovery |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
Rule body yaml
title: Whoami.EXE Execution From Privileged Process
id: 79ce34ca-af29-4d0e-b832-fc1b377020db
related:
- id: 80167ada-7a12-41ed-b8e9-aa47195c66a1
type: obsolete
status: test
description: Detects the execution of "whoami.exe" by privileged accounts that are often abused by threat actors
references:
- https://speakerdeck.com/heirhabarov/hunting-for-privilege-escalation-in-windows-environment
- https://web.archive.org/web/20221019044836/https://nsudo.m2team.org/en-us/
author: Florian Roth (Nextron Systems), Teymur Kheirkhabarov
date: 2022-01-28
modified: 2023-12-04
tags:
- attack.privilege-escalation
- attack.discovery
- attack.t1033
logsource:
category: process_creation
product: windows
detection:
selection_img:
- OriginalFileName: 'whoami.exe'
- Image|endswith: '\whoami.exe'
selection_user:
User|contains:
- 'AUTHORI'
- 'AUTORI'
- 'TrustedInstaller'
condition: all of selection_*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- OriginalFileName: 'whoami.exe'
- Image|endswith: '\whoami.exe'
Stage 2: selection_user
selection_user:
User|contains:
- 'AUTHORI'
- 'AUTORI'
- 'TrustedInstaller'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Image | ends_with |
|
OriginalFileName | eq |
|
User | match |
|