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Indexed Rules
3,707
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Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Execute Code with Pester.bat
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Execute Code with Pester.bat
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: Execute Code with Pester.bat
id: 59e938ff-0d6d-4dc3-b13f-36cc28734d4e
status: test
description: Detects code execution via Pester.bat (Pester - Powershell Modulte for testing)
references:
- https://twitter.com/Oddvarmoe/status/993383596244258816
- https://github.com/api0cradle/LOLBAS/blob/d148d278f5f205ce67cfaf49afdfb68071c7252a/OSScripts/pester.md
author: Julia Fomina, oscd.community
date: 2020-10-08
modified: 2023-11-09
tags:
- attack.execution
- attack.t1059.001
- attack.defense-evasion
- attack.t1216
logsource:
category: process_creation
product: windows
detection:
powershell_module:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
CommandLine|contains|all:
- 'Pester'
- 'Get-Help'
cmd_execution:
Image|endswith: '\cmd.exe'
CommandLine|contains|all:
- 'pester'
- ';'
get_help:
CommandLine|contains:
- 'help'
- '\?'
condition: powershell_module or (cmd_execution and get_help)
falsepositives:
- Legitimate use of Pester for writing tests for Powershell scripts and modules
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_lolbin_pester_1.yml