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In a stunning breach of national cybersecurity, the National Labor Relations Board’s DNS servers were hijacked from April 12–14, 2025, allowing malicious actors full Command and Control (C2) of the agency’s network.
Despite the gravity, this marks the first time ever the National Labor Relations Board secured its DNS—on April 14, 2025. The incident mirrors the Federal Aviation Administration’s catastrophic January 11, 2023 failure, falsely dubbed a “technical glitch,” when C2 was lost over critical NOTAM systems, grounding national air traffic.
These aren’t isolated mishaps—they’re damning evidence of a systemic collapse in cybersecurity practices across federal agencies.
Meanwhile, Cybersecurity and Infrastructure Security Agency’s M-19-01 directive, regulatory mandates, and even common best practices are being flagrantly ignored.
The public and bipartisan leadership are being misled and left vulnerable by government agencies and offices, either unwilling or incapable of safeguarding essential digital infrastructure.
This is more than negligence—it’s a national emergency.
You Should Know:
DNS Security Best Practices
1. Enable DNSSEC (Domain Name System Security Extensions)
sudo apt install bind9 sudo named-checkconf /etc/bind/named.conf sudo systemctl enable --now bind9
Ensures DNS responses are authenticated and tamper-proof.
2. Monitor DNS Traffic for Anomalies
tcpdump -i eth0 port 53 -w dns_traffic.pcap
Analyze DNS queries for signs of hijacking or C2 communication.
3. Implement DNS Filtering
Use tools like Pi-hole to block malicious domains:
curl -sSL https://install.pi-hole.net | bash
4. Restrict Zone Transfers
In BIND (`/etc/bind/named.conf.options`):
allow-transfer { trusted-IP; };
5. Use Strong DNS Server Configurations
Disable recursion for external queries:
recursion no;
Detecting & Mitigating C2 Attacks
- Check for Unauthorized DNS Changes
dig +short NS example.gov
- Block Known Malicious IPs
iptables -A INPUT -s malicious-IP -j DROP
- Log DNS Queries for Forensic Analysis
sudo journalctl -u bind9 --no-pager -n 50
Windows DNS Security
- Enable DNS Cache Locking
Set-DNSServerCache -LockingPercent 100
- Audit DNS Events
Get-WinEvent -LogName "DNS Server" | Where-Object {$_.ID -eq 150}
What Undercode Say
The repeated DNS hijacking incidents highlight systemic failures in U.S. critical infrastructure security. Proactive measures like DNSSEC, DNS filtering, and strict access controls are non-negotiable. Federal agencies must enforce M-19-01 compliance, conduct red-team exercises, and adopt Zero Trust architectures.
Key Commands to Strengthen DNS Security:
- Linux:
sudo ufw allow from trusted-IP to any port 53 sudo systemctl restart bind9
- Windows:
Add-DnsServerTrustAnchor -Name "example.gov" -PublicKey "KEY_DATA"
Expected Output:
A hardened DNS infrastructure with real-time monitoring, preventing unauthorized C2 takeover.
References:
Reported By: Stuart Wood – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
