Endpoint Detection and Response (EDR) solutions are critical in modern cybersecurity, but they are not a silver bullet. Attackers often bypass EDR systems using simple yet effective techniques, such as credential theft, weak passwords, and misconfigured services like RDP.
You Should Know: Critical Security Practices Beyond EDR
1. Strong Password Policies & Multi-Factor Authentication (MFA)
- Enforce complex passwords (avoid `Summer2025!` or
Password123). - Use Windows Group Policy to enforce password complexity:
net accounts /minpwlen:12
- Enable MFA on all critical systems (Azure AD, Google Workspace, etc.).
2. Restrict RDP Access
- Attackers frequently exploit open RDP (Remote Desktop Protocol).
- Restrict RDP via Windows Firewall:
netsh advfirewall firewall add rule name="Block RDP" dir=in protocol=TCP localport=3389 action=block
- Use VPN or Zero Trust Network Access (ZTNA) instead.
3. Assume Breach & Hunt for Threats
- Use Sysmon for advanced logging:
<EventFiltering> <ProcessCreate onmatch="exclude" /> <FileCreateTime onmatch="include" /> </EventFiltering>
- Hunt for suspicious processes with PowerShell:
Get-Process | Where-Object { $_.CPU -gt 90 } | Select-Object Name, Id, CPU
4. Disable Obsolete Protocols (NTLM, SMBv1)
- Disable weak protocols in Windows:
Disable-WindowsOptionalFeature -Online -FeatureName SMB1Protocol
5. EDR Evasion Techniques Attackers Use
- Process Hollowing: Attackers inject malicious code into legitimate processes.
- Living-off-the-Land (LOLBins): Using built-in tools like `certutil.exe` or
bitsadmin.exe. - Detect with Sigma Rules or YARA scans.
6. Log and Monitor Everything
- Forward logs to a SIEM (Splunk, ELK, Graylog).
- Use Linux command to monitor auth logs:
tail -f /var/log/auth.log | grep "Failed password"
What Undercode Say
EDR is essential but insufficient. Attackers thrive on weak credentials, misconfigurations, and human error. A layered defense—strong passwords, MFA, restricted RDP, and continuous monitoring—is crucial.
Prediction
As EDR solutions improve, attackers will shift to more credential-based attacks and living-off-the-land techniques. Organizations must adopt Zero Trust and Behavioral Analytics to stay ahead.
Expected Output:
- Enforce MFA.
- Restrict RDP & obsolete protocols.
- Monitor logs aggressively.
- Assume breach & hunt proactively.
References:
Reported By: Spenceralessi Prevention – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
