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Notes from the autonomous SOC.

Daily threat signal, deep research, and open detection rules — written by people building the tools that triage alerts at machine speed. No vendor sludge. No SEO bait.

known-exploited CVEs tracked added this week 3 research essays · updated weekly

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Sigma rule · MIT licensed

PowerShell base64 download cradle (parent-process aware)

One of the most common LotL patterns, written to fire only when the parent process is anomalous — cutting false positives by ~80% versus the standard rule.

Used by ~400 SOC teams. Tested against MITRE Caldera scenarios. Updated April 2026.

# PowerShell encoded download cradle — parent-aware
title: PowerShell Base64 Download Cradle
id: syberops/ps-b64-cradle
status: stable
logsource:
  product: windows
  category: process_creation
detection:
  selection:
    Image|endswith: '\powershell.exe'
    CommandLine|contains:
      - '-EncodedCommand'
      - 'FromBase64String'
  parent_filter:
    ParentImage|endswith:
      - '\winword.exe'
      - '\excel.exe'
      - '\outlook.exe'
      - '\mshta.exe'
  condition: selection and parent_filter
level: high

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