PowerShell Download Cradle
highWindowsSingle eventexperimentalsigma.powershell_download_cradle · v1.0.0
What it detects
PowerShell in-memory download cradle (Net.WebClient / IEX)
MITRE ATT&CK mapping
- T1059.001Command and Scripting Interpreter: PowerShell· Execution
False positives and triage
Converted from Sigma; review before enabling.
The rule
Declarative YAML read by the detection engine — data, never executed. Confidence 70%. Source: rules/sigma/sigma.powershell_download_cradle.yaml, licensed under the Detection Rule License 1.1.
id: sigma.powershell_download_cradle
version: 1.0.0
status: experimental
severity: high
confidence: 0.7
platforms:
- windows
mitre_techniques:
- T1059.001
description: PowerShell in-memory download cradle (Net.WebClient / IEX) — Sigma sample
match:
event_category: process
process_path_contains_any:
- \powershell.exe
command_line_contains_any:
- Net.WebClient
- DownloadString
- DownloadFile
- IEX(
false_positive_guidance: Converted from Sigma; review before enabling.
Adapted from the SigmaHQ rule “PowerShell Download Cradle”, distributed under the Detection Rule License 1.1. SigmaHQ.
Related detections
Run this rule on your own logs — offline
KIROSEC runs this rule and the rest of the library over Windows, Linux, macOS and cloud audit logs on the analyst's own machine. Every alert links to the events that raised it, and nothing leaves the device.