Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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pySigma Versions
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Newest: 1.3.3
Translation Workspace
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Active Rule
Potentially Suspicious Execution Of Regasm/Regsvcs With Uncommon Extension
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
Potentially Suspicious Execution Of Regasm/Regsvcs With Uncommon Extension
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: Potentially Suspicious Execution Of Regasm/Regsvcs With Uncommon Extension
id: e9f8f8cc-07cc-4e81-b724-f387db9175e4
related:
- id: cc368ed0-2411-45dc-a222-510ace303cb2
type: derived
status: test
description: Detects potentially suspicious execution of the Regasm/Regsvcs utilities with an uncommon extension.
references:
- https://www.fortiguard.com/threat-signal-report/4718?s=09
- https://lolbas-project.github.io/lolbas/Binaries/Regasm/
- https://lolbas-project.github.io/lolbas/Binaries/Regsvcs/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-02-13
tags:
- attack.defense-evasion
- attack.t1218.009
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith:
- '\Regsvcs.exe'
- '\Regasm.exe'
- OriginalFileName:
- 'RegSvcs.exe'
- 'RegAsm.exe'
selection_extension:
CommandLine|contains:
# Note: Add more potentially uncommon extensions
- '.dat'
- '.gif'
- '.jpeg'
- '.jpg'
- '.png'
- '.txt'
condition: all of selection_*
falsepositives:
- Unknown
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_regasm_regsvcs_uncommon_extension_execution.yml