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

Title	PowerShell Script Run in AppData
Description	Detects a suspicious command line execution that invokes PowerShell with reference to an AppData folder
ATT&CK Tactic	TA0002: Execution
ATT&CK Technique	T1059.001: PowerShell T1086: PowerShell
Data Needed	DN_0002_4688_windows_process_creation_with_commandline DN_0003_1_windows_sysmon_process_creation
Trigger	T1059.001: PowerShell
Severity Level	medium
False Positives	Administrative scripts
Development Status	experimental
References	https://twitter.com/JohnLaTwC/status/1082851155481288706 https://app.any.run/tasks/f87f1c4e-47e2-4c46-9cf4-31454c06ce03
Author	Florian Roth

Detection Rules

Sigma rule

title: PowerShell Script Run in AppData
id: ac175779-025a-4f12-98b0-acdaeb77ea85
status: experimental
description: Detects a suspicious command line execution that invokes PowerShell with reference to an AppData folder
references:
    - https://twitter.com/JohnLaTwC/status/1082851155481288706
    - https://app.any.run/tasks/f87f1c4e-47e2-4c46-9cf4-31454c06ce03
tags:
    - attack.execution
    - attack.t1059.001
    - attack.t1086      # an old one     
author: Florian Roth
date: 2019/01/09
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine:
            - '* /c powershell*\AppData\Local\\*'
            - '* /c powershell*\AppData\Roaming\\*'
    condition: selection
falsepositives:
    - Administrative scripts
level: medium

powershell

Get-WinEvent | where {($_.message -match "CommandLine.*.* /c powershell.*\\\\AppData\\\\Local\\\\.*" -or $_.message -match "CommandLine.*.* /c powershell.*\\\\AppData\\\\Roaming\\\\.*") } | select TimeCreated,Id,RecordId,ProcessId,MachineName,Message

es-qs

winlog.event_data.CommandLine.keyword:(*\\ \\/c\\ powershell*\\\\AppData\\\\Local\\\\* OR *\\ \\/c\\ powershell*\\\\AppData\\\\Roaming\\\\*)

xpack-watcher

curl -s -XPUT -H \'Content-Type: application/json\' --data-binary @- localhost:9200/_watcher/watch/ac175779-025a-4f12-98b0-acdaeb77ea85 <<EOF\n{\n  "metadata": {\n    "title": "PowerShell Script Run in AppData",\n    "description": "Detects a suspicious command line execution that invokes PowerShell with reference to an AppData folder",\n    "tags": [\n      "attack.execution",\n      "attack.t1059.001",\n      "attack.t1086"\n    ],\n    "query": "winlog.event_data.CommandLine.keyword:(*\\\\ \\\\/c\\\\ powershell*\\\\\\\\AppData\\\\\\\\Local\\\\\\\\* OR *\\\\ \\\\/c\\\\ powershell*\\\\\\\\AppData\\\\\\\\Roaming\\\\\\\\*)"\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": "winlog.event_data.CommandLine.keyword:(*\\\\ \\\\/c\\\\ powershell*\\\\\\\\AppData\\\\\\\\Local\\\\\\\\* OR *\\\\ \\\\/c\\\\ powershell*\\\\\\\\AppData\\\\\\\\Roaming\\\\\\\\*)",\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          "winlogbeat-*"\n        ]\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      "throttle_period": "15m",\n      "email": {\n        "profile": "standard",\n        "from": "root@localhost",\n        "to": "root@localhost",\n        "subject": "Sigma Rule \'PowerShell Script Run in AppData\'",\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

CommandLine.keyword:(* \\/c powershell*\\\\AppData\\\\Local\\\\* * \\/c powershell*\\\\AppData\\\\Roaming\\\\*)

splunk

(CommandLine="* /c powershell*\\\\AppData\\\\Local\\\\*" OR CommandLine="* /c powershell*\\\\AppData\\\\Roaming\\\\*")

logpoint

CommandLine IN ["* /c powershell*\\\\AppData\\\\Local\\\\*", "* /c powershell*\\\\AppData\\\\Roaming\\\\*"]

grep

grep -P '^(?:.*.* /c powershell.*\\AppData\\Local\\\\.*|.*.* /c powershell.*\\AppData\\Roaming\\\\.*)'