Detection rules › Sigma
PowerShell Script Run in AppData
Detects a suspicious command line execution that invokes PowerShell with reference to an AppData folder
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.001 Command and Scripting Interpreter: PowerShell |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: PowerShell Script Run in AppData
id: ac175779-025a-4f12-98b0-acdaeb77ea85
status: test
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
author: Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community
date: 2019-01-09
modified: 2022-07-14
tags:
- attack.execution
- attack.t1059.001
logsource:
category: process_creation
product: windows
detection:
selection1:
CommandLine|contains:
- 'powershell.exe'
- '\powershell'
- '\pwsh'
- 'pwsh.exe'
selection2:
CommandLine|contains|all:
- '/c '
- '\AppData\'
CommandLine|contains:
- 'Local\'
- 'Roaming\'
condition: all of selection*
falsepositives:
- Administrative scripts
level: medium
Stages and Predicates
Stage 0: condition
all of selection*Stage 1: selection1
selection1:
CommandLine|contains:
- 'powershell.exe'
- '\powershell'
- '\pwsh'
- 'pwsh.exe'
Stage 2: selection2
selection2:
CommandLine|contains|all:
- '/c '
- '\AppData\'
CommandLine|contains:
- 'Local\'
- 'Roaming\'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|