The following analytic identifies path traversal command-line execution. This technique was seen in malicious document that execute malicious code using msdt.exe and path traversal technique that serve as defense evasion. This TTP is a good pivot to look for more suspicious process and command-line that runs before and after this execution. This may help you to find possible downloaded malware or other lolbin execution.
- Type: TTP
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2022-06-01
- Author: Teoderick Contreras, Splunk
- ID: 58fcdeb1-728d-415d-b0d7-3ab18a275ec2
|T1059||Command and Scripting Interpreter||Execution|
Kill Chain Phase
- CIS 3
- CIS 5
- CIS 16
1 2 3 4 5 6 | tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes where Processes.process="*\/..\/..\/..\/*" OR Processes.process="*\\..\\..\\..\\*" OR Processes.process="*\/\/..\/\/..\/\/..\/\/*" by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.original_file_name Processes.process_id Processes.parent_process_id Processes.process_hash | `drop_dm_object_name("Processes")` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_command_and_scripting_interpreter_path_traversal_exec_filter`
The SPL above uses the following Macros:
windows_command_and_scripting_interpreter_path_traversal_exec_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
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
Processes 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
Not known at this moment.
Associated Analytic story
|90.0||90||100||A parent process $parent_process_name$ has spawned a child $process_name$ with path traversal commandline $process$ in $dest$|
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
source | version: 2