Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a live sigma-cli backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,707
Ready to search
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
Dllhost.EXE Initiated Network Connection To Non-Local IP Address
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Dllhost.EXE Initiated Network Connection To Non-Local IP Address
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: Dllhost.EXE Initiated Network Connection To Non-Local IP Address
id: cfed2f44-16df-4bf3-833a-79405198b277
status: test
description: |
Detects Dllhost.EXE initiating a network connection to a non-local IP address.
Aside from Microsoft own IP range that needs to be excluded. Network communication from Dllhost will depend entirely on the hosted DLL.
An initial baseline is recommended before deployment.
references:
- https://redcanary.com/blog/child-processes/
- https://nasbench.medium.com/what-is-the-dllhost-exe-process-actually-running-ef9fe4c19c08
author: bartblaze
date: 2020-07-13
modified: 2024-07-16
tags:
- attack.defense-evasion
- attack.t1218
- attack.execution
- attack.t1559.001
- detection.threat-hunting
logsource:
category: network_connection
product: windows
detection:
selection:
Image|endswith: '\dllhost.exe'
Initiated: 'true'
filter_main_local_ranges:
DestinationIp|cidr:
- '::1/128' # IPv6 loopback
- '10.0.0.0/8'
- '127.0.0.0/8'
- '172.16.0.0/12'
- '192.168.0.0/16'
- '169.254.0.0/16'
- 'fc00::/7' # IPv6 private addresses
- 'fe80::/10' # IPv6 link-local addresses
filter_main_msrange:
DestinationIp|cidr:
- '20.184.0.0/13' # Microsoft Corporation
- '20.192.0.0/10' # Microsoft Corporation
- '23.72.0.0/13' # Akamai International B.V.
- '51.10.0.0/15' # Microsoft Corporation
- '51.103.0.0/16' # Microsoft Corporation
- '51.104.0.0/15' # Microsoft Corporation
- '52.224.0.0/11' # Microsoft Corporation
- '150.171.0.0/19' # Microsoft Corporation
- '204.79.197.0/24' # Microsoft Corporation'
condition: selection and not 1 of filter_main_*
falsepositives:
- Communication to other corporate systems that use IP addresses from public address spaces
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-threat-hunting/windows/network_connection/net_connection_win_dllhost_non_local_ip.yml