Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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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
Suspicious IIS URL GlobalRules Rewrite Via AppCmd
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious IIS URL GlobalRules Rewrite Via AppCmd
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 IIS URL GlobalRules Rewrite Via AppCmd
id: 7c8af9b2-dcae-41a2-a9db-b28c288b5f08
status: test
description: Detects usage of "appcmd" to create new global URL rewrite rules. This behaviour has been observed being used by threat actors to add new rules so they can access their webshells.
references:
- https://twitter.com/malmoeb/status/1616702107242971144
- https://learn.microsoft.com/en-us/answers/questions/739120/how-to-add-re-write-global-rule-with-action-type-r
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-22
tags:
- attack.defense-evasion
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\appcmd.exe'
- OriginalFileName: 'appcmd.exe'
selection_cli:
CommandLine|contains|all:
- 'set'
- 'config'
- 'section:system.webServer/rewrite/globalRules'
- 'commit:'
condition: all of selection_*
falsepositives:
- Legitimate usage of appcmd to add new URL rewrite rules
level: medium
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_iis_appcmd_susp_rewrite_rule.yml