Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
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Active Rule
Serv-U Exploitation CVE-2021-35211 by DEV-0322
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Serv-U Exploitation CVE-2021-35211 by DEV-0322
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: Serv-U Exploitation CVE-2021-35211 by DEV-0322
id: 75578840-9526-4b2a-9462-af469a45e767
status: test
description: Detects patterns as noticed in exploitation of Serv-U CVE-2021-35211 vulnerability by threat group DEV-0322
references:
- https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit/
author: Florian Roth (Nextron Systems)
date: 2021-07-14
modified: 2022-12-18
tags:
- attack.persistence
- attack.t1136.001
- cve.2021-35211
- detection.emerging-threats
# - threat_group.DEV-0322
logsource:
category: process_creation
product: windows
detection:
selection_whoami:
CommandLine|contains: 'whoami'
selection_cmd_1:
CommandLine|contains:
- './Client/Common/'
- '.\Client\Common\'
selection_cmd_2:
CommandLine|contains: 'C:\Windows\Temp\Serv-U.bat'
condition: selection_whoami and 1 of selection_cmd*
falsepositives:
- Unlikely
level: critical
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2021/Exploits/CVE-2021-35211/proc_creation_win_exploit_cve_2021_35211_servu.yml