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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
Dynamic CSharp Compile Artefact
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Dynamic CSharp Compile Artefact
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: Dynamic CSharp Compile Artefact
id: e4a74e34-ecde-4aab-b2fb-9112dd01aed0
status: test
description: |
When C# is compiled dynamically, a .cmdline file will be created as a part of the process.
Certain processes are not typically observed compiling C# code, but can do so without touching disk.
This can be used to unpack a payload for execution
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1027.004/T1027.004.md#atomic-test-2---dynamic-c-compile
author: frack113
date: 2022-01-09
modified: 2023-02-17
tags:
- attack.defense-evasion
- attack.t1027.004
logsource:
product: windows
category: file_event
detection:
selection:
TargetFilename|endswith: '.cmdline'
condition: selection
falsepositives:
- Unknown
level: low
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/file/file_event/file_event_win_csharp_compile_artefact.yml