Techniques
Sample rules
Windows MSIExec DLLRegisterServer
- source: splunk
- technicques:
- T1218.007
Description
The following analytic identifies the usage of msiexec.exe using the /y switch parameter, which grants the ability for msiexec to load DLLRegisterServer. Upon triage, review parent process and capture any artifacts for further review.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where `process_msiexec` Processes.process IN ("*/y*", "*-y*") by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.original_file_name Processes.process Processes.process_id Processes.parent_process_id
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_msiexec_dllregisterserver_filter`
Windows MSIExec Unregister DLLRegisterServer
- source: splunk
- technicques:
- T1218.007
Description
The following analytic identifies the usage of msiexec.exe using the /z switch parameter, which grants the ability for msiexec to unload DLLRegisterServer. Upon triage, review parent process and capture any artifacts for further review.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where `process_msiexec` Processes.process IN ("*/z*", "*-z*") by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.original_file_name Processes.process Processes.process_id Processes.parent_process_id
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_msiexec_unregister_dllregisterserver_filter`