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https://github.com/splunk/security_content
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pyth0n1c
73 lines
3.5 KiB
YAML
73 lines
3.5 KiB
YAML
name: Windows Snake Malware Kernel Driver Comadmin
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id: 628d9c7c-3242-43b5-9620-7234c080a726
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version: 4
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date: '2024-11-13'
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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 EventID 11
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description: The following analytic detects the creation of the comadmin.dat file
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in the %windows%\system32\Com directory, which is associated with Snake Malware.
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This detection leverages the Endpoint.Filesystem data model to identify file creation
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events matching the specified path and filename. This activity is significant because
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the comadmin.dat file is part of Snake Malware's installation process, which includes
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dropping a kernel driver and a custom DLL. If confirmed malicious, this activity
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could allow an attacker to load a malicious driver, potentially leading to privilege
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escalation and persistent access to the compromised system.
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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\\*"
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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
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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 `Filesystem` 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: 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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drilldown_searches:
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- name: View the detection results for - "$dest$"
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search: '%original_detection_search% | search dest = "$dest$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: A kernel driver comadmin.dat related to Snake Malware was written to disk
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on $dest$.
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risk_objects:
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- field: dest
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type: system
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score: 56
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threat_objects: []
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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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mitre_attack_id:
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- T1547.006
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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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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:
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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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