Q1 2026 Threat Landscape: Vulnerability Exploitation Surpasses Phishing — Strategic Shift Detection

---
title: Web Server Spawning System Shell
id: 8a2b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects web server processes spawning cmd.exe, powershell.exe, or bash shells, a common indicator of web shell or vulnerability exploitation.
references:
  - https://attack.mitre.org/techniques/T1190/
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.initial_access
  - attack.t1190
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    ParentImage|endswith:
      - '\w3wp.exe'
      - '\httpd.exe'
      - '\nginx.exe'
      - '\php-cgi.exe'
    Image|endswith:
      - '\cmd.exe'
      - '\powershell.exe'
      - '\pwsh.exe'
  condition: selection
falsepositives:
  - Legitimate administrative debugging by developers
level: high
---
title: Rapid File Encryption Activity
id: 9b3c4d5e-6f7a-8b9c-0d1e-2f3a4b5c6d7e
status: experimental
description: Detects mass encryption of files indicative of aggressive encryption-based ransomware operations mentioned in the threat report.
references:
  - https://attack.mitre.org/techniques/T1486/
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.impact
  - attack.t1486
logsource:
  category: file_change
  product: windows
detection:
  selection:
    TargetFilename|contains:
      - '.encrypted'
      - '.locked'
    Image|endswith:
      - '\cmd.exe'
      - '\powershell.exe'
      - '\rundll32.exe'
  timeframe: 5m
  condition: selection | count() > 50
falsepositives:
  - Legitimate backup compression operations
level: critical

// Hunt for suspicious child processes of common web services
DeviceProcessEvents
| where Timestamp > ago(7d)
| where InitiatingProcessFileName in~("w3wp.exe", "httpd.exe", "nginx.exe", "java.exe", "tomcat.exe")
| where ProcessFileName in~("cmd.exe", "powershell.exe", "pwsh.exe", "bash", "sh")
| project Timestamp, DeviceName, AccountName, InitiatingProcessFileName, ProcessFileName, ProcessCommandLine, FolderPath
| order by Timestamp desc

-- Hunt for web servers spawning shells or unusual network connections
SELECT Pid, Name, CommandLine, Exe, Username, Parent.Pid AS ParentPid, Parent.Name AS ParentName
FROM pslist()
WHERE Parent.Name =~ "w3wp" OR Parent.Name =~ "httpd" OR Parent.Name =~ "nginx"
  AND (Name =~ "cmd" OR Name =~ "powershell" OR Name =~ "bash")

# Script to audit common internet-facing services and check for recent patches
Write-Host "Starting Exposure Management Audit..." -ForegroundColor Cyan

# Check for IIS
$iisCheck = Get-WindowsFeature -Name Web-Server
if ($iisCheck.Installed) {
    Write-Host "[!] IIS is installed. Ensure all CVEs are patched." -ForegroundColor Yellow
    Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like "*IIS*" } | Select-Object Name, Version
}

# Check for common vulnerable services (Example: Apache/Nginx on Windows)
$services = @("Apache", "nginx")
foreach ($svc in $services) {
    $serviceStatus = Get-Service | Where-Object { $_.Name -like "*$svc*" }
    if ($serviceStatus) {
        Write-Host "[!] Found service: $($serviceStatus.Name). Verify version against CVE database." -ForegroundColor Yellow
    }
}

# Check for recent Windows Updates (Last 30 days)
$hotfixes = Get-HotFix | Where-Object { $_.InstalledOn -gt (Get-Date).AddDays(-30) }
if (-not $hotfixes) {
    Write-Host "[WARNING] No patches installed in the last 30 days. System may be vulnerable to recent exploits." -ForegroundColor Red
} else {
    Write-Host "[OK] Recent patches found." -ForegroundColor Green
}