Detection rules › Sigma
Rundll32 Execution Without Parameters
Detects rundll32 execution without parameters as observed when running Metasploit windows/smb/psexec exploit module
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1569.002 System Services: Service Execution |
| Lateral Movement | T1021.002 Remote Services: SMB/Windows Admin Shares, T1570 Lateral Tool Transfer |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: Rundll32 Execution Without Parameters
id: 5bb68627-3198-40ca-b458-49f973db8752
status: test
description: Detects rundll32 execution without parameters as observed when running Metasploit windows/smb/psexec exploit module
references:
- https://bczyz1.github.io/2021/01/30/psexec.html
author: Bartlomiej Czyz, Relativity
date: 2021-01-31
modified: 2023-02-28
tags:
- attack.lateral-movement
- attack.t1021.002
- attack.t1570
- attack.execution
- attack.t1569.002
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine:
- 'rundll32.exe'
- 'rundll32'
condition: selection
falsepositives:
- False positives may occur if a user called rundll32 from CLI with no options
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine:
- 'rundll32.exe'
- 'rundll32'
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 | eq |
|