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 Jun 07, 2010 | Updated Sep 15, 2017

Learn about other threats

Backdoor:Win32/Yonsole.B

Detected by Microsoft Defender Antivirus

Aliases: W32/OnlineGames.EI.gen!Eldorado (Command) Backdoor.Win32.Torr.bvp (Kaspersky) BackDoor.Generic12.AMPZ (AVG) Trojan.Generic.3769058 (BitDefender) Win32/Tnega.AJE (CA) Win32/Farfli.AC (ESET) Backdoor.Win32.Inject (Ikarus) PWS-OnlineGames.im (McAfee) Backdoor.Win32.Undef.gop (Rising AV) Troj/Bckdr-RCK (Sophos)

Summary

Backdoor:Win32/Yonsole.B is a trojan that allows unauthorized access and control of an affected computer, and connects to a remote host for instructions.

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.

Backdoor:Win32/Yonsole.B

Summary

What to do now

Technical information

Threat behavior

Installation

Payload

Prevention

Symptoms