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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
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Active Rule
Suspicious Child Process of AspNetCompiler
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Child Process of AspNetCompiler
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 Child Process of AspNetCompiler
id: 9ccba514-7cb6-4c5c-b377-700758f2f120 # SuspChild
related:
- id: 4c7f49ee-2638-43bb-b85b-ce676c30b260 # TMP File
type: similar
- id: 9f50fe98-fe5c-4a2d-86c7-fad7f63ed622 # Susp Paths
type: similar
- id: a01b8329-5953-4f73-ae2d-aa01e1f35f00 # Exec
type: similar
status: test
description: Detects potentially suspicious child processes of "aspnet_compiler.exe".
references:
- https://lolbas-project.github.io/lolbas/Binaries/Aspnet_Compiler/
- https://ijustwannared.team/2020/08/01/the-curious-case-of-aspnet_compiler-exe/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-08-14
tags:
- attack.defense-evasion
- attack.t1127
logsource:
category: process_creation
product: windows
detection:
selection_parent:
ParentImage|endswith: '\aspnet_compiler.exe'
selection_child:
# Note: add other potential suspicious child processes and paths
- Image|endswith:
- '\calc.exe'
- '\notepad.exe'
- Image|contains:
- '\Users\Public\'
- '\AppData\Local\Temp\'
- '\AppData\Local\Roaming\'
- ':\Temp\'
- ':\Windows\Temp\'
- ':\Windows\System32\Tasks\'
- ':\Windows\Tasks\'
condition: all of selection_*
falsepositives:
- Unknown
level: high
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_aspnet_compiler_susp_child_process.yml