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Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
3,707
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Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
Suspicious CustomShellHost Execution
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious CustomShellHost Execution
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: Suspicious CustomShellHost Execution
id: 84b14121-9d14-416e-800b-f3b829c5a14d
status: test
description: |
Detects the execution of CustomShellHost.exe where the child isn't located in 'C:\Windows\explorer.exe'. CustomShellHost is a known LOLBin that can be abused by attackers for defense evasion techniques.
references:
- https://github.com/LOLBAS-Project/LOLBAS/pull/180
- https://lolbas-project.github.io/lolbas/Binaries/CustomShellHost/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-19
modified: 2025-10-29
tags:
- attack.defense-evasion
- attack.t1216
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\CustomShellHost.exe'
filter_main_explorer:
Image: 'C:\Windows\explorer.exe'
condition: selection and not 1 of filter_main_*
falsepositives:
- False positives are unlikely, investigate matches carefully.
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_customshellhost_susp_exec.yml