Detection rules › Sigma
New User Created Via Net.EXE With Never Expire Option
Detects creation of local users via the net.exe command with the option "never expire"
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1136.001 Create Account: Local Account |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
Rule body yaml
title: New User Created Via Net.EXE With Never Expire Option
id: b9f0e6f5-09b4-4358-bae4-08408705bd5c
related:
- id: cd219ff3-fa99-45d4-8380-a7d15116c6dc
type: derived
status: test
description: Detects creation of local users via the net.exe command with the option "never expire"
references:
- https://thedfirreport.com/2022/07/11/select-xmrig-from-sqlserver/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-12
modified: 2023-02-21
tags:
- attack.persistence
- attack.t1136.001
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith:
- '\net.exe'
- '\net1.exe'
- OriginalFileName:
- 'net.exe'
- 'net1.exe'
selection_cli:
CommandLine|contains|all:
- 'user'
- 'add'
- 'expires:never'
condition: all of selection_*
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith:
- '\net.exe'
- '\net1.exe'
- OriginalFileName:
- 'net.exe'
- 'net1.exe'
Stage 2: selection_cli
selection_cli:
CommandLine|contains|all:
- 'user'
- 'add'
- 'expires:never'
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 |
|