Rundll32 Execution Without CommandLine Parameters
Detects suspicious start of rundll32.exe without any parameters as found in CobaltStrike beacon activity
Detection logic
selection
CommandLine|endswith:
- \rundll32.exe
- \rundll32.exe"
- \rundll32filter
ParentImage|contains:
- \AppData\Local\
- \Microsoft\Edge\Condition
selection and not filterRaw YAML
title: Rundll32 Execution Without CommandLine Parameters
id: 1775e15e-b61b-4d14-a1a3-80981298085a
status: test
description: Detects suspicious start of rundll32.exe without any parameters as found in CobaltStrike beacon activity
references:
- https://www.cobaltstrike.com/help-opsec
- https://twitter.com/ber_m1ng/status/1397948048135778309
author: Florian Roth (Nextron Systems)
date: 2021-05-27
modified: 2023-08-31
tags:
- attack.stealth
- attack.t1202
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|endswith:
- '\rundll32.exe'
- '\rundll32.exe"'
- '\rundll32'
filter:
ParentImage|contains:
- '\AppData\Local\'
- '\Microsoft\Edge\'
condition: selection and not filter
falsepositives:
- Possible but rare
level: highFalse positives
- Possible but rare