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CLI Versions
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Newest: 2.0.2
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Active Rule
Potential Regsvr32 Commandline Flag Anomaly
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Regsvr32 Commandline Flag Anomaly
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: Potential Regsvr32 Commandline Flag Anomaly
id: b236190c-1c61-41e9-84b3-3fe03f6d76b0
status: test
description: Detects a potential command line flag anomaly related to "regsvr32" in which the "/i" flag is used without the "/n" which should be uncommon.
references:
- https://twitter.com/sbousseaden/status/1282441816986484737?s=12
author: Florian Roth (Nextron Systems)
date: 2019-07-13
modified: 2024-03-13
tags:
- attack.defense-evasion
- attack.t1218.010
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith: '\regsvr32.exe'
CommandLine|contains|windash: ' -i:'
filter_main_flag:
CommandLine|contains|windash: ' -n '
condition: selection and not 1 of filter_main_*
falsepositives:
- Administrator typo might cause some false positives
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_regsvr32_flags_anomaly.yml