Windows Snake Malware Kernel Driver Comadmin
Description
The following analytic detects the creation of the comadmin.dat file in the %windows%\system32\Com directory, which is associated with Snake Malware. This detection leverages the Endpoint.Filesystem data model to identify file creation events matching the specified path and filename. This activity is significant because the comadmin.dat file is part of Snake Malware's installation process, which includes dropping a kernel driver and a custom DLL. If confirmed malicious, this activity could allow an attacker to load a malicious driver, potentially leading to privilege escalation and persistent access to the compromised system.
- Type: TTP
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2024-05-20
- Author: Michael Haag, Splunk
- ID: 628d9c7c-3242-43b5-9620-7234c080a726
Annotations
ATT&CK
Kill Chain Phase
- Installation
- Exploitation
NIST
- DE.CM
CIS20
- CIS 10
CVE
Search
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| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) 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 Filesystem.file_path Filesystem.dest
| `drop_dm_object_name(Filesystem)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_snake_malware_kernel_driver_comadmin_filter`
Macros
The SPL above uses the following Macros:
windows_snake_malware_kernel_driver_comadmin_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Required fields
List of fields required to use this analytic.
- _time
- Filesystem.file_create_time
- Filesystem.process_id
- Filesystem.file_name
- Filesystem.file_path
- Filesystem.dest
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.
Known False Positives
False positives may be present, filter as needed.
Associated Analytic Story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
56.0 | 70 | 80 | A kernel driver comadmin.dat related to Snake Malware was written to disk on $dest$. |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
Reference
Test Dataset
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
source | version: 2