Phoenix Studio
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
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Active Rule
Injected Browser Process Spawning Rundll32 - GuLoader Activity
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Injected Browser Process Spawning Rundll32 - GuLoader Activity
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: Injected Browser Process Spawning Rundll32 - GuLoader Activity
id: 89e1490f-1a3e-452a-bbb8-b68a5f58072f
status: test
description: |
Detects the execution of installed GuLoader malware on the host.
GuLoader is initiating network connections via the rundll32.exe process that is spawned via a browser parent(injected) process.
references:
- Internal Research
author: '@kostastsale'
date: 2023-08-07
tags:
- attack.privilege-escalation
- attack.defense-evasion
- attack.t1055
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith:
- '\chrome.exe'
- '\firefox.exe'
- '\msedge.exe'
Image|endswith: '\rundll32.exe'
CommandLine|endswith: '\rundll32.exe'
condition: selection
falsepositives:
- Unlikely
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2023/Malware/GuLoader/proc_creation_win_malware_guloader_execution.yml