arp-scan.exe

arp-scan Command-Line Network Scanner (Windows)

Application ProcessSafeNetwork Scanner
CPU Usage
2-12%
Memory
20-120 MB
Location
C:\Program Files\arp-scan\arp-scan.exe
Publisher
The Honeynet Project

Quick Answer

arp-scan.exe is safe. It's a Windows port of a network ARP scanner used for local subnet discovery, typically invoked from a command prompt or script.

Is it a Virus?
 NO - Safe
Must be in C:\Program Files\arp-scan\arp-scan.exe or C:\Program Files (x86)\arp-scan\arp-scan.exe
Can I Disable?
 YES
arp-scan.exe is a command-line network scanner and does not persist as a background service unless invoked by a script or task
Privileges
 Requires Admin
Requires administrative privileges to access raw sockets on Windows for ARP probing

What is arp-scan.exe?

arp-scan.exe is the Windows port of a fast ARP network scanner. It sends ARP requests on your local network to identify devices, collecting IPs, MAC addresses, and vendor data. It’s a command-line tool used for inventory, security audits, and quick network discovery.

This tool sends ARP probes on the chosen interface and parses replies to list active hosts with IP, MAC, and vendor information. It requires admin rights to access raw sockets and operates from the command line for automation.

Quick Fact: arp-scan originated as a lightweight discovery utility; it performs rapid ARP scans to enumerate hosts without needing full packet capture tools.

Types of arp-scan Processes

Is arp-scan.exe Safe?

Yes, arp-scan.exe is Safe when downloaded from legitimate sources and used on networks you own or have explicit permission to scan.

Is arp-scan.exe a Virus or Malware?

The legitimate arp-scan.exe is not a virus. Malware may mimic the name, so verify signature and origin.

How to Tell if arp-scan.exe is Legitimate or Malware

  1. File Location:: Must be in C:\Program Files\arp-scan\arp-scan.exe or C:\Program Files (x86)\arp-scan\arp-scan.exe. Any arp-scan.exe elsewhere is suspicious.
  2. Digital Signature:: Right-click the file -> Properties -> Digital Signatures. Should show a legitimate publisher such as "The Honeynet Project" or an official arp-scan signer.
  3. Resource Usage:: Normal idle usage is 0-1% CPU; during a scan expect 2-12% CPU and 20-60 MB memory.
  4. Behavior:: arp-scan.exe should not install services or modify system settings. If it runs in the background without a user-initiated scan, investigate.

Red Flags: If arp-scan.exe is located in unusual folders (e.g., Temp, AppData), runs when you’re not scanning, has no valid signature, or uses abnormal resources, scan with dedicated antivirus. Look for similarly named files like "arp-scan64.exe" from untrusted sources.

Why Is arp-scan.exe Running on My PC?

arp-scan.exe runs when a scan is initiated from a terminal, script, or a management tool. It may also be invoked by automated inventory tasks or security audits.

Reasons it's running:

Can I Disable or Remove arp-scan.exe?

Yes, you can disable arp-scan.exe. It’s safe to remove or block if you do not use network discovery; ensure you have alternatives for inventory and security checks.

How to Stop arp-scan.exe

How to Uninstall arp-scan

Common Problems: High CPU or Memory Usage

If arp-scan.exe is consuming excessive resources or producing unexpected results during a scan:

Common Causes & Solutions

Quick Fixes:
1. Quick Fixes:
2. 1. Run a targeted scan: arp-scan.exe -I <interface> <subnet> (e.g., arp-scan -I eth0 192.168.1.0/24)
3. 2. Limit scope and timeout: use options to reduce duration and scope.
4. 3. Ensure admin privileges are used only when required.
5. 4. Update to the latest arp-scan version from trusted sources.
6. 5. Run in a controlled window to avoid network congestion.

Frequently Asked Questions

What is arp-scan.exe and is it safe to run on Windows?

arp-scan.exe is a Windows port of a network ARP scanner. It’s safe when obtained from trusted sources and used with permission on networks you own.

How do I install arp-scan on Windows?

To install arp-scan on Windows, download a trusted Windows port package or build from source if provided by the project, then place arp-scan.exe in a directory you control and run from a command prompt with appropriate privileges.

Can I legally use arp-scan.exe on my network?

Yes, you can run arp-scan.exe to discover devices on your local network. Always ensure you have authorization to scan the network to avoid policy violations.

Will antivirus detect arp-scan.exe as malware?

Antivirus software may flag network scanning tools; ensure you download from legitimate sources and corroborate with digital signatures. If flagged, verify the signer and file integrity.

What information does arp-scan.exe provide?

arp-scan.exe outputs a list of IPs, MAC addresses, and vendor data for hosts that replied to ARP probes. Use the results to inventory devices and identify unknown hosts.

What should I do if I don’t want arp-scan.exe on my system?

If you don’t need ARP-based discovery, you can remove or block arp-scan.exe and rely on your organization's asset management tools or approved network scanners.

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