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P4T12ICK
70 lines
2.5 KiB
YAML
70 lines
2.5 KiB
YAML
name: Check Elevated CMD using whoami
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id: a9079b18-1633-11ec-859c-acde48001122
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version: 1
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date: '2021-09-15'
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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 search is to detect a suspicious whoami execution to check if the
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cmd or shell instance process is with elevated privileges. This technique was seen
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in FIN7 js implant where it execute this as part of its data collection to the infected
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machine to check if the running shell cmd process is elevated or not. This TTP is
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really a good alert for known attacker that recon on the targetted host. This command
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is not so commonly executed by a normal user or even an admin to check if a process
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is elevated.
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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 = "*whoami*"
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Processes.process = "*/group*" Processes.process = "* find *" Processes.process
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= "*12288*" by Processes.dest Processes.user Processes.parent_process Processes.process_name
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Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `check_elevated_cmd_using_whoami_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. Tune and filter known instances where renamed rundll32.exe may be used.
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known_false_positives: unknown
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references: []
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tags:
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analytic_story:
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- FIN7
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confidence: 80
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context:
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- Source:Endpoint
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- Stage:Execution
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/fin7/fin7_js_2/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: Process name $process_name$ with commandline $process$ in $dest$
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mitre_attack_id:
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- T1033
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observable:
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- name: dest
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type: Endpoint
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role:
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- Victim
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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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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.parent_process_name
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- Processes.parent_process
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- Processes.process_name
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- Processes.process_id
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- Processes.process
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- Processes.dest
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- Processes.user
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risk_score: 56
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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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