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

Title	Taskmgr as Parent
Description	Detects the creation of a process from Windows task manager
ATT&CK Tactic	TA0005: Defense Evasion
ATT&CK Technique	T1036: Masquerading
Data Needed	DN_0002_4688_windows_process_creation_with_commandline DN_0003_1_windows_sysmon_process_creation
Trigger	T1036: Masquerading
Severity Level	low
False Positives	Administrative activity
Development Status	experimental
References	There are no documented References for this Detection Rule yet
Author	Florian Roth

Detection Rules

Sigma rule

title: Taskmgr as Parent
id: 3d7679bd-0c00-440c-97b0-3f204273e6c7
status: experimental
description: Detects the creation of a process from Windows task manager
tags:
    - attack.defense_evasion
    - attack.t1036
author: Florian Roth
date: 2018/03/13
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage: '*\taskmgr.exe'
    filter:
        Image:
            - '*\resmon.exe'
            - '*\mmc.exe'
            - '*\taskmgr.exe'
    condition: selection and not filter
fields:
    - Image
    - CommandLine
    - ParentCommandLine
falsepositives:
    - Administrative activity
level: low

es-qs

(ParentImage.keyword:*\\\\taskmgr.exe AND (NOT (Image.keyword:(*\\\\resmon.exe OR *\\\\mmc.exe OR *\\\\taskmgr.exe))))

xpack-watcher

curl -s -XPUT -H \'Content-Type: application/json\' --data-binary @- localhost:9200/_watcher/watch/3d7679bd-0c00-440c-97b0-3f204273e6c7 <<EOF\n{\n  "metadata": {\n    "title": "Taskmgr as Parent",\n    "description": "Detects the creation of a process from Windows task manager",\n    "tags": [\n      "attack.defense_evasion",\n      "attack.t1036"\n    ],\n    "query": "(ParentImage.keyword:*\\\\\\\\taskmgr.exe AND (NOT (Image.keyword:(*\\\\\\\\resmon.exe OR *\\\\\\\\mmc.exe OR *\\\\\\\\taskmgr.exe))))"\n  },\n  "trigger": {\n    "schedule": {\n      "interval": "30m"\n    }\n  },\n  "input": {\n    "search": {\n      "request": {\n        "body": {\n          "size": 0,\n          "query": {\n            "bool": {\n              "must": [\n                {\n                  "query_string": {\n                    "query": "(ParentImage.keyword:*\\\\\\\\taskmgr.exe AND (NOT (Image.keyword:(*\\\\\\\\resmon.exe OR *\\\\\\\\mmc.exe OR *\\\\\\\\taskmgr.exe))))",\n                    "analyze_wildcard": true\n                  }\n                }\n              ],\n              "filter": {\n                "range": {\n                  "timestamp": {\n                    "gte": "now-30m/m"\n                  }\n                }\n              }\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": "root@localhost",\n        "subject": "Sigma Rule \'Taskmgr as Parent\'",\n        "body": "Hits:\\n{{#ctx.payload.hits.hits}}Hit on {{_source.@timestamp}}:\\n            Image = {{_source.Image}}\\n      CommandLine = {{_source.CommandLine}}\\nParentCommandLine = {{_source.ParentCommandLine}}================================================================================\\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.keyword:*\\\\taskmgr.exe AND (NOT (Image.keyword:(*\\\\resmon.exe *\\\\mmc.exe *\\\\taskmgr.exe))))

splunk

(ParentImage="*\\\\taskmgr.exe" NOT ((Image="*\\\\resmon.exe" OR Image="*\\\\mmc.exe" OR Image="*\\\\taskmgr.exe"))) | table Image,CommandLine,ParentCommandLine

logpoint

(event_id="1" ParentImage="*\\\\taskmgr.exe"  -(Image IN ["*\\\\resmon.exe", "*\\\\mmc.exe", "*\\\\taskmgr.exe"]))

grep

grep -P '^(?:.*(?=.*.*\\taskmgr\\.exe)(?=.*(?!.*(?:.*(?=.*(?:.*.*\\resmon\\.exe|.*.*\\mmc\\.exe|.*.*\\taskmgr\\.exe))))))'