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Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
3,707
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17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Scripting/CommandLine Process Spawned Regsvr32
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Scripting/CommandLine Process Spawned Regsvr32
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: Scripting/CommandLine Process Spawned Regsvr32
id: ab37a6ec-6068-432b-a64e-2c7bf95b1d22
related:
- id: 8e2b24c9-4add-46a0-b4bb-0057b4e6187d
type: obsolete
status: test
description: Detects various command line and scripting engines/processes such as "PowerShell", "Wscript", "Cmd", etc. spawning a "regsvr32" instance.
references:
- https://web.archive.org/web/20171001085340/https://subt0x10.blogspot.com/2017/04/bypass-application-whitelisting-script.html
- https://app.any.run/tasks/34221348-072d-4b70-93f3-aa71f6ebecad/
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-26
tags:
- attack.defense-evasion
- attack.t1218.010
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith:
- '\cmd.exe'
- '\cscript.exe'
- '\mshta.exe'
- '\powershell_ise.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\wscript.exe'
Image|endswith: '\regsvr32.exe'
filter_main_rpcproxy:
ParentImage: C:\Windows\System32\cmd.exe
CommandLine|endswith: ' /s C:\Windows\System32\RpcProxy\RpcProxy.dll'
condition: selection and not 1 of filter_main_*
falsepositives:
- Legitimate ".bat", ".hta", ".ps1" or ".vbs" scripts leverage legitimately often. Apply additional filter and exclusions as necessary
- Some legitimate Windows services
level: medium # Can be reduced to low if you experience a ton of FP
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_regsvr32_susp_parent.yml