**How to Manually Audit Your Computer for Hacks**

Computer Security: Manual Security Audit

Your computer's security is paramount, especially when dealing with potential hacks. Antivirus software is a good start, but it doesn't catch everything. A manual security audit can reveal hidden threats that antivirus software might miss. Here’s how to perform a basic manual security audit on your computer.

Why This Matters

Ensuring your computer’s security is more than just installing antivirus software. It’s about understanding the signs of a compromise and knowing how to investigate potential breaches. This knowledge can help you protect your personal and professional data from unauthorized access.

Main Discussion

Identifying Ghost Users

The first step in a manual security audit is to check for "ghost users" or unauthorized accounts. Hackers sometimes create backdoor accounts to maintain access even after you change your password. Here’s how to spot them:

On Windows:

1. Press Win + R to open the Run dialog box.
2. Type netplwiz and press Enter. This opens the User Accounts window.
3. Look for accounts you don’t recognize, such as admin1 or a random string of letters. If you find any, it could be a sign of a hacker’s backdoor.

On Mac:

1. Open System Settings and go to Users & Groups.
2. Review the list of users. If you see an unknown account, it might be a red flag.

Hunting for Background Parasites

Background parasites are malicious processes that run in the background, often launching at startup. These can be indicators of a compromised system.

On Windows:

1. Open Task Manager by pressing Ctrl + Shift + Escape.
2. Go to the Startup tab.
3. Look for unknown apps launching at boot, weird process names, or programs from publishers you don't recognize. Any of these could be a sign of trouble.

On Mac:

1. Open Activity Monitor.
2. Go to the Login Items tab.
3. Check for any unfamiliar items. If you find something suspicious, like win_driver.exe running from an unusual app data folder, it's a serious red flag.

Monitoring Network Connections

Hackers often use your computer to communicate with external servers. Monitoring your network connections can help you spot unusual activity.

On Windows:

1. Open Command Prompt as an administrator and type netstat -ano.
2. Look for established connections, especially if your browser is closed. If you see strange connections, copy the suspicious IP addresses.

On Mac:

1. Open Terminal and type lsof -i -p.
2. Review the list of connections. If you find anything suspicious, copy the IP addresses.

To check if these IPs are malicious, use a service like VirusTotal. Copy the suspicious IPs into VirusTotal to see if they are flagged as malicious. This can give you a clearer picture of whether your system is compromised.

Checking for Invisible Scheduled Tasks

Hackers often create invisible scheduled tasks to maintain persistence on your system. These tasks can run at odd hours and perform malicious actions.

On Windows:

1. Open Task Scheduler and look for tasks with boring names like "Chrome Cleanup" or fake update services.
2. If a task points to a weird .bat, .vbs, or unknown script, research it before deleting anything. Deleting the wrong file can break your operating system.

On Mac:

1. Launch the Activity Monitor and check for any unknown agents or launch demons.
2. Similar to Windows, research any suspicious scripts before making any changes.

Practical Tips

• Regular Audits: Perform regular security audits to catch potential threats early.
• Update Software: Keep your operating system and all software up to date to protect against known vulnerabilities.
• Use Strong Passwords: Ensure all your accounts have strong, unique passwords. Consider using a password manager to keep track of them.
• Enable Two-Factor Authentication (2FA): Wherever possible, enable 2FA to add an extra layer of security.

Important Takeaways

• Ghost Users: Always check for unknown user accounts, as they can be a sign of a backdoor.
• Background Processes: Regularly review your startup items and running processes to identify any unusual activity.
• Network Connections: Monitor your network connections to spot any unauthorized communication.
• Scheduled Tasks: Inspect your scheduled tasks for any suspicious activity, especially scripts running at odd hours.

Conclusion

Performing a manual security audit is a critical step in ensuring your computer’s safety. While antivirus software provides a layer of protection, it's not enough on its own. By following the steps outlined above, you can identify and address potential security threats, helping to keep your data safe.