Wurst's Alt Manager saves your alts in an encrypted format, while most other clients store them in plain text. This makes the WurstClient more resistant against viruses and people who try to steal your Minecraft accounts.
Based on analyses from top security firms coupled with my own use of Wurst for years, I can definitively say no – Wurst hacked client does not contain any viruses or malware.
Generally, the official Wurst client, downloaded from its official website, is considered safe and virus-free. However, downloading from unofficial sources carries significant risk of malware infection.
As of Wurst 7.44, Wurst exclusively uses its own systems for doing translations and keybinds, which vanilla Minecraft can't see or read any data from. So now, any data leaks in Minecraft's translation/keybind system just won't affect Wurst at all.
The WurstClient is not a virus and the official Minecraft Wiki never claimed otherwise. The displayed claim is from an anonymous commenter on a Minecraft Wiki Q&A forum.
However, there is a huge incentive to put malware in such a popular client. This is not the main question, but can you give me advice on how to ghost cheat with this client, so I'm not banned within 0.0002 seconds?
There’s no such thing as a “safe” cheat client in Minecraft, especially in competitive eSports. Any client offering cheats inherently violates the terms of service and risks a ban, potentially leading to account suspension or permanent removal from official servers and tournaments.
If you’re detected using Wurstclient, the consequences can be severe. You may be banned from the server, and in some cases, your account may be permanently banned.
Wurst’s Alt Manager saves your alts in an encrypted format, while most other clients store them in plain text. This makes the WurstClient more resistant against viruses and people who try to steal your Minecraft accounts.