Detection rules › Sigma
Security Privileges Enumeration Via Whoami.EXE
Detects a whoami.exe executed with the /priv command line flag instructing the tool to show all current user privileges. This is often used after a privilege escalation attempt.
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: Security Privileges Enumeration Via Whoami.EXE
id: 97a80ec7-0e2f-4d05-9ef4-65760e634f6b
status: test
description: Detects a whoami.exe executed with the /priv command line flag instructing the tool to show all current user privileges. This is often used after a privilege escalation attempt.
references:
- https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/whoami
author: Florian Roth (Nextron Systems)
date: 2021-05-05
modified: 2023-02-28
tags:
- attack.privilege-escalation
- attack.discovery
- attack.t1033
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\whoami.exe'
- OriginalFileName: 'whoami.exe'
selection_cli:
CommandLine|contains:
- ' /priv'
- ' -priv'
condition: all of selection_*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith: '\whoami.exe'
- OriginalFileName: 'whoami.exe'
Stage 2: selection_cli
selection_cli:
CommandLine|contains:
- ' /priv'
- ' -priv'
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 |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|
OriginalFileName | eq |
|