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Active Rule
Potential Rundll32 Execution With DLL Stored In ADS
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Rundll32 Execution With DLL Stored In ADS
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Potential Rundll32 Execution With DLL Stored In ADS
id: 9248c7e1-2bf3-4661-a22c-600a8040b446
status: test
description: Detects execution of rundll32 where the DLL being called is stored in an Alternate Data Stream (ADS).
references:
- https://lolbas-project.github.io/lolbas/Binaries/Rundll32
author: Harjot Singh, '@cyb3rjy0t'
date: 2023-01-21
modified: 2023-02-08
tags:
- attack.defense-evasion
- attack.t1564.004
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
# Example:
# rundll32 "C:\ads\file.txt:ADSDLL.dll",DllMain
# Note: This doesn't cover the use case where a full path for the DLL isn't used. As it requires a more expensive regex
CommandLine|re: '[Rr][Uu][Nn][Dd][Ll][Ll]32(\.[Ee][Xx][Ee])? \S+?\w:\S+?:'
condition: all of selection_*
falsepositives:
- Unknown
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_rundll32_ads_stored_dll_execution.yml