In my opinion, there is no reason to believe that hotfix.exe is a keylogger. file.net is probably wrong. As you can see, the file has a 0/55 detection ratio on VirusTotal. Furthermore, according to these three sources, the file is related to ASP.NET Security Update for Microsoft .NET Framework 1.1 Service Pack 1
/Microsoft .NET Framework 1.1 Hotfix (KB886903).
As you can see from our very own Uninstall Programs Database
(highlights are mine):
And this is from the official Microsoft download page
Description: Add or Remove Programs entry for Microsoft .NET Framework 1.1 Hotfix (KB886903). This security update for .NET Framework 1.1 addresses a vulnerability in ASP.NET that could allow elevation of privilege and information disclosure.
A canonicalization vulnerability exists in ASP.NET that could allow an attacker to bypass the security of an ASP.NET Web site and gain unauthorized access. An attacker who successfully exploited this vulnerability could take a variety of actions, depending on the specific contents of the website.
Uninstall Command: "C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\Updates\hotfix.exe" "C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\Updates\M886903\M886903Uninstall.msp"
And this is from the KB page:
A security issue has been identified that could allow an attacker to compromise a computer running .NET Framework 1.1 SP1.
Microsoft has released security bulletin MS05-004. The security bulletin contains all the relevant information about the security update, including file manifest information and deployment options. To view the complete security bulletin, visit the following Microsoft Web site:
Additionally, please read very carefully what file.net said about hotfix.exe (highlights are mine):
If hotfix.exe is located in a subfolder of the user's profile folder, the security rating is 60% dangerous. The file size is 895,488 bytes (50% of all occurrences) or 564,736 bytes. There is no file information. The program has no visible window. It is not a Windows system file. Hotfix.exe is able to record keyboard and mouse inputs and monitor applications.
The user's profile folder is %userprofile%, commonly C:\Users\yourusername\, not %WinDir%.
I personally don't use XP currently, so I don't know whether if hotfix.exe will be in the same directory it should be, if I install all Windows Updates. Curiously, what made you so concerned about this file?
P.S. If you'd like we can run some malware scanners to ensure your computer is clean.
Edited by bwv848, 22 November 2016 - 08:19 PM.