atomic-threat-coverage/Atomic_Threat_Coverage/Detection_Rules/sysmon_powersploit_schtasks.md

Title	Default PowerSploit Schtasks Persistence
Description	Detects the creation of a schtask via PowerSploit Default Configuration
ATT&CK Tactic	TA0002: Execution TA0003: Persistence
ATT&CK Technique	T1053: Scheduled Task T1086: PowerShell
Data Needed	DN_0024_21_windows_sysmon_WmiEvent DN_0022_19_windows_sysmon_WmiEvent DN_0010_6_windows_sysmon_driver_loaded DN_0015_11_windows_sysmon_FileCreate DN_0008_4_windows_sysmon_sysmon_service_state_changed DN_0014_10_windows_sysmon_ProcessAccess DN_0018_14_windows_sysmon_RegistryEvent DN_0007_3_windows_sysmon_network_connection DN_0016_12_windows_sysmon_RegistryEvent DN_0011_7_windows_sysmon_image_loaded DN_0021_18_windows_sysmon_PipeEvent DN_0023_20_windows_sysmon_WmiEvent DN_0017_13_windows_sysmon_RegistryEvent DN_0019_15_windows_sysmon_FileCreateStreamHash DN_0020_17_windows_sysmon_PipeEvent DN_0003_1_windows_sysmon_process_creation DN_0012_8_windows_sysmon_CreateRemoteThread DN_0006_2_windows_sysmon_process_changed_a_file_creation_time DN_0013_9_windows_sysmon_RawAccessRead DN_0009_5_windows_sysmon_process_terminated
Trigger	T1053: Scheduled Task T1086: PowerShell
Severity Level	high
False Positives	False positives are possible, depends on organisation and processes
Development Status	experimental
References	https://github.com/0xdeadbeefJERKY/PowerSploit/blob/8690399ef70d2cad10213575ac67e8fa90ddf7c3/Persistence/Persistence.psm1
Author	Markus Neis
Other Tags	attack.privelege_escalation attack.s0111 attack.s0111 attack.g0022 attack.g0022 attack.g0060 attack.g0060

Detection Rules

Sigma rule

title: Default PowerSploit Schtasks Persistence 
status: experimental
description: Detects the creation of a schtask via PowerSploit Default Configuration 
references:
    - https://github.com/0xdeadbeefJERKY/PowerSploit/blob/8690399ef70d2cad10213575ac67e8fa90ddf7c3/Persistence/Persistence.psm1
author: Markus Neis
date: 2018/03/06
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        ParentImage:
            - '*\Powershell.exe'
        CommandLine:
            - '*\schtasks.exe*/Create*/RU*system*/SC*ONLOGON*'
            - '*\schtasks.exe*/Create*/RU*system*/SC*DAILY*'
            - '*\schtasks.exe*/Create*/RU*system*/SC*ONIDLE*'
            - '*\schtasks.exe*/Create*/RU*system*/SC*HOURLY*'
    condition: selection
tags:
    - attack.execution
    - attack.persistence
    - attack.privelege_escalation
    - attack.t1053
    - attack.t1086
    - attack.s0111
    - attack.g0022
    - attack.g0060
falsepositives:
    - False positives are possible, depends on organisation and processes
level: high

Kibana query

(ParentImage.keyword:(*\\\\Powershell.exe) AND CommandLine.keyword:(*\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*ONLOGON* *\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*DAILY* *\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*ONIDLE* *\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*HOURLY*))

X-Pack Watcher

curl -s -XPUT -H \'Content-Type: application/json\' --data-binary @- localhost:9200/_xpack/watcher/watch/Default-PowerSploit-Schtasks-Persistence <<EOF\n{\n  "trigger": {\n    "schedule": {\n      "interval": "30m"\n    }\n  },\n  "input": {\n    "search": {\n      "request": {\n        "body": {\n          "size": 0,\n          "query": {\n            "query_string": {\n              "query": "(ParentImage.keyword:(*\\\\\\\\Powershell.exe) AND CommandLine.keyword:(*\\\\\\\\schtasks.exe*\\\\/Create*\\\\/RU*system*\\\\/SC*ONLOGON* *\\\\\\\\schtasks.exe*\\\\/Create*\\\\/RU*system*\\\\/SC*DAILY* *\\\\\\\\schtasks.exe*\\\\/Create*\\\\/RU*system*\\\\/SC*ONIDLE* *\\\\\\\\schtasks.exe*\\\\/Create*\\\\/RU*system*\\\\/SC*HOURLY*))",\n              "analyze_wildcard": true\n            }\n          }\n        },\n        "indices": []\n      }\n    }\n  },\n  "condition": {\n    "compare": {\n      "ctx.payload.hits.total": {\n        "not_eq": 0\n      }\n    }\n  },\n  "actions": {\n    "send_email": {\n      "email": {\n        "to": null,\n        "subject": "Sigma Rule \'Default PowerSploit Schtasks Persistence\'",\n        "body": "Hits:\\n{{#ctx.payload.hits.hits}}{{_source}}\\n================================================================================\\n{{/ctx.payload.hits.hits}}",\n        "attachments": {\n          "data.json": {\n            "data": {\n              "format": "json"\n            }\n          }\n        }\n      }\n    }\n  }\n}\nEOF\n

Graylog

(ParentImage:("*\\\\Powershell.exe") AND CommandLine:("*\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*ONLOGON*" "*\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*DAILY*" "*\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*ONIDLE*" "*\\\\schtasks.exe*\\/Create*\\/RU*system*\\/SC*HOURLY*"))