Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a live sigma-cli backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,707
Ready to search
Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
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Active Rule
New Self Extracting Package Created Via IExpress.EXE
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
New Self Extracting Package Created Via IExpress.EXE
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: New Self Extracting Package Created Via IExpress.EXE
id: c2b478fc-09bf-40b2-8768-ab3ec8d61c9a
status: test
description: |
Detects the "iexpress.exe" utility creating self-extracting packages.
Attackers where seen leveraging "iexpress" to compile packages on the fly via ".sed" files.
Investigate the command line options provided to "iexpress" and in case of a ".sed" file, check the contents and legitimacy of it.
references:
- https://strontic.github.io/xcyclopedia/library/iexpress.exe-D594B2A33EFAFD0EABF09E3FDC05FCEA.html
- https://en.wikipedia.org/wiki/IExpress
- https://decoded.avast.io/janvojtesek/raspberry-robins-roshtyak-a-little-lesson-in-trickery/
- https://www.virustotal.com/gui/file/602f4ae507fa8de57ada079adff25a6c2a899bd25cd092d0af7e62cdb619c93c/behavior
author: Joseliyo Sanchez, @Joseliyo_Jstnk
date: 2024-02-05
tags:
- attack.defense-evasion
- attack.t1218
- detection.threat-hunting
logsource:
category: process_creation
product: windows
detection:
selection_1_parent:
ParentImage|endswith: '\iexpress.exe'
selection_1_img:
- Image|endswith: '\makecab.exe'
- OriginalFileName: 'makecab.exe'
selection_2_img:
- Image|endswith: '\iexpress.exe'
- OriginalFileName: 'IEXPRESS.exe'
selection_2_cli:
CommandLine|contains: ' /n '
condition: all of selection_1_* or all of selection_2_*
falsepositives:
- Administrators building packages using iexpress.exe
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-threat-hunting/windows/process_creation/proc_creation_win_iexpress_execution.yml