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
Tune Translation
Active Rule
System Info Discovery via Sysinfo Syscall
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
System Info Discovery via Sysinfo Syscall
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: System Info Discovery via Sysinfo Syscall
id: b207d563-a1d9-4275-b349-77d1eb55aa6d
status: experimental
description: |
Detects use of the sysinfo system call in Linux, which provides a snapshot of key system statistics such as uptime, load averages, memory usage, and the number of running processes.
Malware or reconnaissance tools might leverage sysinfo to fingerprint the system - gathering data to determine if it's a viable target.
references:
- https://github.com/CheraghiMilad/bypass-Neo23x0-auditd-config/blob/f1c478a37911a5447d5ffcd580f22b167bf3df14/sysinfo-syscall/README.md
- https://man7.org/linux/man-pages/man2/sysinfo.2.html
author: Milad Cheraghi
date: 2025-05-30
modified: 2025-12-05
tags:
- attack.discovery
- attack.t1057
- attack.t1082
logsource:
product: linux
service: auditd
definition: |
Required auditd configuration:
-a always,exit -F arch=b64 -S sysinfo -k discovery_sysinfo_syscall
-a always,exit -F arch=b32 -S sysinfo -k discovery_sysinfo_syscall
detection:
selection:
type: 'SYSCALL'
SYSCALL: 'sysinfo'
filter_optional_splunk:
exe|endswith: '/bin/splunkd'
condition: selection and not 1 of filter_optional_*
falsepositives:
- Legitimate administrative activity
level: low
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/auditd/syscall/lnx_auditd_susp_discovery_sysinfo_syscall.yml