Attention: We have transitioned to a new AAD or Microsoft Entra ID from the week of May 20, 2024. In case your tenant requires admin consent, please refer to this document located at Overview of user and admin consent - Microsoft Entra ID | Microsoft Learn and grant access to App ID: 6ba09155-cb24-475b-b24f-b4e28fc74365 with graph permissions for Directory.Read.All and User.Read for continued access. While the app may appear unverified, you can confirm its legitimacy by verifying the App ID provided.

We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names

Published Sep 30, 2010 | Updated Sep 15, 2017

Learn about other threats

Spoofer:Win32/Arpspoof.A

Detected by Microsoft Defender Antivirus

Aliases: Win-AppCare/Agent.38400 (AhnLab) Application.Tool.847 (BitDefender) Tool.Hijack (Dr.Web) Win32/Spy.Agent.ALD (ESET) not-a-virus:NetTool.Win32.Agent.g (Kaspersky) Generic PUP.x (McAfee) Hack.Win32.Agent.vbn (Rising AV) NetTool.Win32.Agent.g (Sunbelt Software) HackTool.Agent.GBFY (VirusBuster) Virtool:Win32/Obfuscator.BX (other)

Summary

Spoofer:Win32/Arpspoof.A is trojan that uses ARP poisoning attacks on the local network to divert HTTP traffic and inject malicious IFrames into hijacked web traffic.

To detect and remove this threat and other malicious software that may be installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following:

For more information on antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.

Spoofer:Win32/Arpspoof.A

Summary

What to do now

Technical information

Threat behavior

Installation

Payload

Prevention

Symptoms