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Spencer Alessi, a Senior Pentester at SecurIT360, emphasizes that the most effective way to mitigate cyber attacks is to control identity, minimize privileges, and verify everything. Attackers rely on access—whether through stolen credentials, excessive privileges, or weak authentication. By enforcing least privilege, strong passwords, MFA, and zero-trust principles, organizations can drastically increase the cost of attacks and deter adversaries.
You Should Know:
1. Identity Control (Linux/Windows)
- Linux:
List all users cat /etc/passwd Check sudo privileges sudo -l Disable unused accounts sudo usermod --expiredate 1 [bash] Enforce password policies sudo vi /etc/login.defs
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Windows:
List local admins net localgroup Administrators Disable inactive users net user [bash] /active:no Enforce password policies secedit /export /cfg secpolicy.inf
2. Minimizing Privileges
-
Linux:
Remove user from sudo group sudo deluser [bash] sudo Restrict root access sudo passwd -l root
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Windows:
Remove admin rights Remove-LocalGroupMember -Group "Administrators" -Member "[bash]" Enable LAPS (Local Admin Password Solution) Install-Module -Name LAPS
3. Verification (MFA & Logging)
-
Linux (SSH + MFA):
Install Google Authenticator sudo apt install libpam-google-authenticator Configure SSH for MFA sudo nano /etc/pam.d/sshd
Add:
auth required pam_google_authenticator.so
– Windows (MFA via Azure AD):
Enforce MFA for all users Connect-MsolService Set-MsolUser -UserPrincipalName [email protected] -StrongAuthenticationRequirements @{"State"="Enabled"}
4. Monitoring & Logging
- Linux (Auditd):
Install auditd sudo apt install auditd Track sudo commands sudo auditctl -a always,exit -F arch=b64 -S execve -F path=/usr/bin/sudo
- Windows (Event Logging):
Enable detailed logging auditpol /set /subcategory:"Logon" /success:enable /failure:enable
What Undercode Say:
The foundation of cybersecurity is access control. Attackers exploit weak identities, excessive privileges, and lax verification. By implementing zero-trust policies, enforcing MFA, and monitoring logs, organizations can significantly reduce attack surfaces.
Prediction:
As identity-based attacks (like pass-the-hash, Golden Ticket) rise, AI-driven identity governance will become critical. Expect more automated privilege management tools in 2024-2025.
Expected Output:
Sample Linux privilege audit sudo grep -E 'sudo|admin' /etc/group sudo cat /var/log/auth.log | grep "FAILED"
Sample Windows privilege audit Get-LocalGroupMember -Group "Administrators" Get-WinEvent -LogName Security -FilterXPath "[System[EventID=4624]]"
Relevant URLs:
References:
Reported By: Spenceralessi If – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
