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https://github.com/splunk/security_content
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Michael Haag
55 lines
2.5 KiB
YAML
55 lines
2.5 KiB
YAML
name: Windows Snake Malware Kernel Driver Comadmin
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id: 628d9c7c-3242-43b5-9620-7234c080a726
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version: 1
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date: '2023-05-11'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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data_source:
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- Sysmon Event ID 13
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description: 'The following analytic identifies the comadmin.dat file written to disk, which is related to Snake Malware. From the report, Snakes installer drops the kernel driver and a custom DLL which is used to load the driver into a
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single AES encrypted file on disk. Typically, this file is named comadmin.dat and is stored in the %windows%\system32\Com directory.'
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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.Filesystem where Filesystem.file_path="*\\windows\\system32\\com\\*" AND Filesystem.file_name="comadmin.dat" by Filesystem.file_create_time Filesystem.process_id Filesystem.file_name
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Filesystem.file_path Filesystem.dest | `drop_dm_object_name(Filesystem)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_snake_malware_kernel_driver_comadmin_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Filesystem` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
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known_false_positives: False positives may be present, filter as needed.
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references:
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- https://media.defense.gov/2023/May/09/2003218554/-1/-1/0/JOINT_CSA_HUNTING_RU_INTEL_SNAKE_MALWARE_20230509.PDF
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tags:
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analytic_story:
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- Snake Malware
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asset_type: Endpoint
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atomic_guid:
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- e5cb5564-cc7b-4050-86e8-f2d9eec1941f
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confidence: 80
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impact: 70
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message: A kernel driver comadmin.dat related to Snake Malware was written to disk on $dest$.
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mitre_attack_id:
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- T1547.006
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observable:
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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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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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risk_score: 56
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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.file_path
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- Filesystem.dest
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/snakemalware/comadmin_windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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