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105 lines
4.6 KiB
Markdown
105 lines
4.6 KiB
Markdown
---
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title: "Disabling Task Manager"
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excerpt: "Disable or Modify Tools, Impair Defenses"
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categories:
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- Endpoint
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last_modified_at: 2021-03-31
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toc: true
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toc_label: ""
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tags:
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- Disable or Modify Tools
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- Defense Evasion
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- Impair Defenses
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- Defense Evasion
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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- Endpoint
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---
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[Try in Splunk Security Cloud](https://www.splunk.com/en_us/cyber-security.html){: .btn .btn--success}
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#### Description
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This search is to identifies modification of registry to disable the task manager of windows operating system. this event or technique are commonly seen in malware such as RAT, Trojan, TrojanSpy or worm to prevent the user to terminate their process.
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- **Type**: TTP
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- **Product**: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
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- **Datamodel**: [Endpoint](https://docs.splunk.com/Documentation/CIM/latest/User/Endpoint)
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- **Last Updated**: 2021-03-31
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- **Author**: Teoderick Contreras, Splunk
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- **ID**: dac279bc-9202-11eb-b7fb-acde48001122
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#### [ATT&CK](https://attack.mitre.org/)
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| ID | Technique | Tactic |
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| ----------- | ----------- |--------------- |
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| [T1562.001](https://attack.mitre.org/techniques/T1562/001/) | Disable or Modify Tools | Defense Evasion |
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| [T1562](https://attack.mitre.org/techniques/T1562/) | Impair Defenses | Defense Evasion |
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#### Search
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```
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| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Registry where Registry.registry_path= "*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\DisableTaskMgr" Registry.registry_value_data = "0x00000001" by Registry.registry_path Registry.registry_key_name Registry.registry_value_data Registry.dest
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| `drop_dm_object_name(Registry)`
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `disabling_task_manager_filter`
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```
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#### Associated Analytic Story
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* [Windows Defense Evasion Tactics](/stories/windows_defense_evasion_tactics)
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#### How To Implement
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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 `Registry` node. Also make sure that this registry was included in your config files ex. sysmon config to be monitored.
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#### Required field
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* _time
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* Registry.registry_key_name
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* Registry.registry_path
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* Registry.user
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* Registry.dest
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* Registry.registry_value_name
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#### Kill Chain Phase
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* Exploitation
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#### Known False Positives
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admin may disable this application for non technical user.
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#### RBA
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| Risk Score | Impact | Confidence | Message |
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| ----------- | ----------- |--------------|--------------|
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| 42.0 | 70 | 60 | The Windows Task Manager was disabled on $dest$ by $user$. |
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#### Reference
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* [https://any.run/report/ea4ea08407d4ee72e009103a3b77e5a09412b722fdef67315ea63f22011152af/a866d7b1-c236-4f26-a391-5ae32213dfc4#registry](https://any.run/report/ea4ea08407d4ee72e009103a3b77e5a09412b722fdef67315ea63f22011152af/a866d7b1-c236-4f26-a391-5ae32213dfc4#registry)
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* [https://blog.talosintelligence.com/2020/05/threat-roundup-0424-0501.html](https://blog.talosintelligence.com/2020/05/threat-roundup-0424-0501.html)
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#### Test Dataset
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Replay any dataset to Splunk Enterprise by using our [`replay.py`](https://github.com/splunk/attack_data#using-replaypy) tool or the [UI](https://github.com/splunk/attack_data#using-ui).
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Alternatively you can replay a dataset into a [Splunk Attack Range](https://github.com/splunk/attack_range#replay-dumps-into-attack-range-splunk-server)
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* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-security.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-security.log)
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* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log)
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* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log)
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[*source*](https://github.com/splunk/security_content/tree/develop/detections/endpoint/disabling_task_manager.yml) \| *version*: **1** |