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P4T12ICK
83 lines
2.8 KiB
YAML
83 lines
2.8 KiB
YAML
name: Disabling Net User Account
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id: c0325326-acd6-11eb-98c2-acde48001122
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version: 2
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date: '2021-05-04'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This analytic will identify a suspicious command-line that disables a
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user account using the `net.exe` utility native to Windows. This technique may used
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by the adversaries to interrupt availability of such users to do their malicious
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act.
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search: '| tstats `security_content_summariesonly` values(Processes.process) as process
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values(Processes.parent_process) as parent_process values(Processes.process_id)
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as process_id count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
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where `process_net` AND Processes.process="*user*" AND Processes.process="*/active:no*"
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by Processes.process_name Processes.original_file_name Processes.dest Processes.user
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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)` | `disabling_net_user_account_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: unknown
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references:
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- https://thedfirreport.com/2020/04/20/sqlserver-or-the-miner-in-the-basement/
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tags:
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analytic_story:
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- XMRig
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confidence: 60
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context:
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- Source:Endpoint
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- Stage:Persistence
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/xmrig_miner/windows-sysmon.log
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impact: 70
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kill_chain_phases:
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- Exploitation
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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disabling a user account on endpoint $dest$ by user $user$.
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mitre_attack_id:
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- T1531
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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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- name: process_name
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type: Process
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role:
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- Child 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_name
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- Processes.parent_process
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- Processes.original_file_name
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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_path
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- Processes.process_path
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- Processes.parent_process_id
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risk_score: 42
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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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asset_type: Endpoint
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