splApache-2.0from splunk/security_content
Detect mshta inline hta execution
The following analytic detects the execution of "mshta.exe" with inline protocol handlers such as "JavaScript", "VBScript", and "About". It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line arguments and process details. This activity is significant because mshta.exe can be exploited to execute malicious scripts, potentially leading to unauthorized code execution. If confirmed malicious, this could allow an attacker to execute arbitrary code, escalate privileges, or establish persistence within the environment, posing a severe security risk.
Quality
67
FP risk
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Rule sourcedetections/endpoint/detect_mshta_inline_hta_execution.yml
| tstats `security_content_summariesonly` count values(Processes.process)
as process values(Processes.parent_process) as parent_process min(_time) as firstTime
max(_time) as lastTime from datamodel=Endpoint.Processes where
`process_mshta`
Processes.process IN ("*vbscript*", "*javascript*", "*about*")
by Processes.action Processes.dest Processes.original_file_name Processes.parent_process
Processes.parent_process_exec Processes.parent_process_guid Processes.parent_process_id
Processes.parent_process_name Processes.parent_process_path Processes.process
Processes.process_exec Processes.process_guid Processes.process_hash
Processes.process_id Processes.process_integrity_level Processes.process_name
Processes.process_path Processes.user Processes.user_id Processes.vendor_product
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `detect_mshta_inline_hta_execution_filter`