Ultrasurf.exe |top| Jun 2026

| | Legitimate ultrasurf.exe | Fake/Malware | | :--- | :--- | :--- | | File Size | ~1–2 MB | Over 5 MB or under 500 KB | | Digital Signature | Signed by "UltraReach Internet Corp" | Unsigned or fake signer | | Network Behavior | Connects only to ports 80, 443, 9666 | Connects to IRC, unknown C2 servers | | Persistence | No registry changes (portable) | Adds startup entries, scheduled tasks | | Browser Changes | Only proxy settings | Changes homepage, installs extensions |

UltraSurf ( ultrasurf.exe ) is a lightweight, portable software tool originally created to help internet users in China bypass the Great Firewall. Over the years, it has evolved into a global privacy tool used by millions. ultrasurf.exe

In its legitimate form, ultrasurf.exe is a safe and legal privacy tool. However, because it creates an encrypted tunnel, it is sometimes flagged by antivirus software or corporate firewalls as "potentially unwanted software" (PUA) or a "riskware." This is because network administrators cannot see what the user is transferring through the tunnel. | | Legitimate ultrasurf