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tccontre
100 lines
3.5 KiB
YAML
100 lines
3.5 KiB
YAML
name: Windows Disable Memory Crash Dump
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id: 59e54602-9680-11ec-a8a6-acde48001122
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version: 1
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date: '2022-02-25'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: The following analytic identifies a process that is attempting to disable
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the ability on Windows to generate a memory crash dump. This was recently identified
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being utilized by HermeticWiper. To disable crash dumps, the value must be set to
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0. This feature is typically modified to perform a memory crash dump when a computer
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stops unexpectedly because of a Stop error (also known as a blue screen, system
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crash, or bug check).
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search: '| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Registry
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where (Registry.registry_path="*\\CurrentControlSet\\Control\\CrashControl\\CrashDumpEnabled")
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AND Registry.registry_value_data="0x00000000" by _time span=1h Registry.dest Registry.user
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Registry.registry_path Registry.registry_value_name Registry.registry_value_data
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Registry.process_guid Registry.registry_key_name | `drop_dm_object_name(Registry)`
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|join process_guid [| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Processes
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by _time span=1h Processes.process_id Processes.process_name Processes.process Processes.dest
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Processes.parent_process_name Processes.parent_process Processes.process_guid |
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`drop_dm_object_name(Processes)` | fields _time dest user parent_process_name parent_process
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process_name process_path process process_guid registry_path registry_value_name
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registry_value_data registry_key_name] | table _time dest user parent_process_name
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parent_process process_name process_path process process_guid registry_path registry_value_name
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registry_value_data registry_key_name | `windows_disable_memory_crash_dump_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 Filesystem responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Filesystem` and `Registry`
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node.
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known_false_positives: unknown
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references:
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- https://blog.talosintelligence.com/2022/02/threat-advisory-hermeticwiper.html
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- https://docs.microsoft.com/en-us/troubleshoot/windows-server/performance/memory-dump-file-options
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tags:
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analytic_story:
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- Data Destruction
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- Ransomware
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- Hermetic Wiper
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- Windows Registry Abuse
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 100
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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/hermetic_wiper/sysmon.log
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impact: 90
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kill_chain_phases:
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- Exploitation
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message: A process $process_name$ was identified attempting to disable memory crash
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dumps on $dest$.
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mitre_attack_id:
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- T1485
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nist:
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- DE.CM
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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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- Filesystem.file_create_time
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- Filesystem.process_id
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- Filesystem.file_name
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- Filesystem.user
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- Filesystem.file_path
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- Filesystem.dest
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- Processes.process_id
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- Processes.process_name
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- Processes.process
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- Processes.dest
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.process_guid
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risk_score: 90
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security_domain: endpoint
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asset_type: Endpoint
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