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Microsoft Defender XDR has demonstrated its capability to detect multi-stage cyberattacks targeting Operational Technology (OT) devices. When a compromised Defender for Endpoint device (Risk Level: High 🟥) communicates with an OT device, it triggers an automated incident response. The Automatic Attack Disruption feature can halt such attacks at machine speed, enhancing security for critical infrastructure.
You Should Know:
1. Key Defender XDR Commands for Incident Response
To investigate and respond to OT-related threats using Microsoft Defender XDR, security teams can use the following PowerShell and Linux commands:
- Check compromised devices in Defender for Endpoint:
Get-MachineInvestigation -DeviceName "CompromisedDevice"
- Isolate a high-risk device:
Start-MachineIsolation -DeviceName "CompromisedDevice" -Comment "OT Attack Mitigation"
- List active incidents in Defender XDR:
Get-Incident -Severity High
2. Linux Commands for OT Security Monitoring
Since OT devices often run on Linux-based systems, these commands help in threat detection:
- Check active network connections (useful for detecting lateral movement):
netstat -tulnp | grep "suspicious_ip"
- Monitor process activity for anomalies:
ps aux | grep -E "malicious_process|unexpected_service"
- Analyze logs for unauthorized access attempts:
grep "Failed password" /var/log/auth.log
3. Windows Security Commands for OT Protection
- Scan for malicious activities using Windows Defender:
MpCmdRun.exe -Scan -ScanType 3
- Check firewall rules for suspicious outbound connections:
Get-NetFirewallRule | Where-Object { $<em>.Action -eq "Allow" -and $</em>.Direction -eq "Outbound" }
What Undercode Say:
Microsoft Defender XDR’s integration with Defender for IoT strengthens OT security by automating attack disruption. Security teams must:
– Monitor lateral movement from IT to OT networks.
– Use PowerShell and Linux commands for real-time threat hunting.
– Leverage Automatic Attack Disruption to minimize breach impact.
For further reading:
Expected Output:
A structured incident report with automated remediation actions, including device isolation and attack disruption logs.
( extended with verified commands and security practices.)
References:
Reported By: Derkvanderwoude Bettertogether – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
