Techniques
Sample rules
Linux Indicator Removal Service File Deletion
- source: splunk
- technicques:
- T1070.004
- T1070
Description
This analytic looks for suspicious linux processes that delete service unit configuration files. This technique was seen in several malware to delete service configuration files to corrupt a services or security product as part of its defense evasion. This TTP detection can be a good indicator of possible malware try to kill several services or a wiper like AwfulShred shell script that wipes the targeted linux host
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name = "rm" AND Processes.process = "*rm *" AND Processes.process = "*.service" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `linux_indicator_removal_service_file_deletion_filter`