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pyth0n1c
82 lines
2.9 KiB
YAML
82 lines
2.9 KiB
YAML
name: XSL Script Execution With WMIC
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id: 004e32e2-146d-11ec-a83f-acde48001122
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version: 1
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date: '2021-09-13'
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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 wmic.exe process or renamed wmic
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process to execute malicious xsl file. This technique was seen in FIN7 to execute
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its malicous jscript using the .xsl as the loader with the help of wmic.exe process.
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This TTP is really a good indicator for you to hunt further for FIN7 or other attacker
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that known to used this technique.
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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 `process_wmic` Processes.process
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= "*os get*" Processes.process="*/format:*" Processes.process = "*.xsl*" by Processes.parent_process_name
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Processes.parent_process Processes.process_name Processes.process_id Processes.process
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Processes.dest Processes.user | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `xsl_script_execution_with_wmic_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: unknown
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references:
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- https://www.mandiant.com/resources/fin7-pursuing-an-enigmatic-and-evasive-global-criminal-operation
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- https://attack.mitre.org/groups/G0046/
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- https://web.archive.org/web/20190814201250/https://subt0x11.blogspot.com/2018/04/wmicexe-whitelisting-bypass-hacking.html
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1220/T1220.md#atomic-test-3---wmic-bypass-using-local-xsl-file
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tags:
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analytic_story:
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- FIN7
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- Suspicious WMI Use
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confidence: 70
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/fin7/fin7_macro_js_1/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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on endpoint $dest$ by user $user$ utilizing wmic to load a XSL script.
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mitre_attack_id:
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- T1220
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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.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: 49
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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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