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mvelazco
91 lines
3.6 KiB
YAML
91 lines
3.6 KiB
YAML
name: Rubeus Command Line Parameters
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id: cca37478-8377-11ec-b59a-acde48001122
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version: 1
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date: '2022-02-01'
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author: Mauricio Velazco, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: Rubeus is a C# toolset for raw Kerberos interaction and abuses. It is
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heavily adapted from Benjamin Delpys Kekeo project and Vincent LE TOUXs MakeMeEnterpriseAdmin
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project. This analytic looks for the use of Rubeus command line arguments utilized
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in common Kerberos attacks like exporting and importing tickets, forging silver
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and golden tickets, requesting a TGT or TGS, kerberoasting, password spraying, etc.
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Red teams and adversaries alike use Rubeus for Kerberos attacks within Active Directory
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networks. Defenders should be aware that adversaries may customize the source code
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of Rubeus and modify the command line parameters. This would effectively bypass
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this analytic.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where (Processes.process = "*ptt /ticket*"
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OR Processes.process = "* monitor /interval*" OR Processes.process ="* asktgt* /user:*" OR
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Processes.process ="* asktgs* /service:*" OR Processes.process ="* golden* /user:*"
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OR Processes.process ="* silver* /service:*" OR Processes.process ="* kerberoast*"
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OR Processes.process ="* asreproast*" OR Processes.process = "* renew* /ticket:*"
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OR Processes.process = "* brute* /password:*" OR Processes.process = "* brute* /passwords:*"
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OR Processes.process ="* harvest*") by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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Processes.parent_process_name | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `rubeus_command_line_parameters_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: Although unlikely, legitimate applications may use the same
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command line parameters as Rubeus. Filter as needed.
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references:
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- https://github.com/GhostPack/Rubeus
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- https://web.archive.org/web/20210725005734/http://www.harmj0y.net/blog/redteaming/from-kekeo-to-rubeus/
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- https://attack.mitre.org/techniques/T1550/003/
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- https://en.hackndo.com/kerberos-silver-golden-tickets/
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tags:
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analytic_story:
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- Active Directory Kerberos Attacks
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asset_type: Endpoint
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confidence: 60
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context:
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- Source:Endpoint
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- Stage:Privilege Escalation
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1550.003/rubeus/windows-sysmon.log
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impact: 60
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kill_chain_phases:
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- Exploitation
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message: Rubeus command line parameters were used on $dest$
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mitre_attack_id:
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- T1550
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- T1550.003
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- T1558
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- T1558.003
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- T1558.004
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observable:
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- name: user
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type: User
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role:
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- Victim
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.dest
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- Processes.user
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- Processes.parent_process
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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- Processes.parent_process_name
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risk_score: 36
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security_domain: endpoint
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supported_tas:
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- Splunk_TA_microsoft_sysmon
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