This commit is contained in:
Detection Testing Service
2021-05-07 15:29:25 +00:00
@@ -6,21 +6,21 @@ author: Teoderick Contreras, Splunk
type: batch
datamodel:
- Endpoint
description: This search is to detect a suspicious commandline that disable a net user account.
This technique may used by the adversaries or attacker to interrupt availability of such users to do their malicious act.
description: This search is to detect a suspicious commandline that disable a net
user account. This technique may used by the adversaries or attacker to interrupt
availability of such users to do their malicious act.
search: '| tstats `security_content_summariesonly` values(Processes.process) as process
values(Processes.parent_process) as parent_process values(Processes.process_id)
as process_id count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
where Processes.process_name="net.exe" OR Processes.process_name="net1.exe" AND Processes.process="*user*" AND Processes.process="*/active:no*"
by Processes.process_name Processes.dest Processes.user Processes.parent_process_name
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `disabling_net_user_account_filter`'
where Processes.process_name="net.exe" OR Processes.process_name="net1.exe" AND
Processes.process="*user*" AND Processes.process="*/active:no*" by Processes.process_name
Processes.dest Processes.user Processes.parent_process_name | `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `disabling_net_user_account_filter`'
how_to_implement: To successfully implement this search, you need to be ingesting
logs with the process name, parent process, and command-line executions from your
endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
Sysmon TA. Tune and filter known instances where renamed net.exe/net1.exe may be used.
Sysmon TA. Tune and filter known instances where renamed net.exe/net1.exe may be
used.
known_false_positives: unknown
references:
- https://thedfirreport.com/2020/04/20/sqlserver-or-the-miner-in-the-basement/
@@ -40,7 +40,10 @@ tags:
- Processes.process_name
- Processes.dest
- Processes.user
- Processes.parent_process_name
- Processes.parent_process_name
- Processes.process_id
- Processes.parent_process
security_domain: endpoint
security_domain: endpoint
automated_detection_testing: passed
dataset:
- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/xmrig_miner/windows-sysmon.log