We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ابحث في الدعم

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Trojan loves Firefox?

  • 2 (ردّان اثنان)
  • 1 has this problem
  • 6 views
  • آخر ردّ كتبه csylvester

more options

I bought this computer from a 'professional' refurbisher. None of my other computers show a Trojan infection, and MS Security Essentials shows a Trojan in the 6/6D cache of Firefox. I've tried MSSE, Malwarebytes, SuperAntiSpyware, & Trojan Remover. Only MSSE sees the Trojan, and after I delete it it pops back up. Manually deleted file, then even uninstalled Firefox & re-installed it. After a day, the Trojan was back. Thoughts, please? Thanks. Chuck

I bought this computer from a 'professional' refurbisher. None of my other computers show a Trojan infection, and MS Security Essentials shows a Trojan in the 6/6D cache of Firefox. I've tried MSSE, Malwarebytes, SuperAntiSpyware, & Trojan Remover. Only MSSE sees the Trojan, and after I delete it it pops back up. Manually deleted file, then even uninstalled Firefox & re-installed it. After a day, the Trojan was back. Thoughts, please? Thanks. Chuck

الحل المُختار

Hi,

It could be a cache entry from a visited website. You can upload the particular file to VirusTotal for a comprehensive analysis with many different scan engines. If MS Security Essentials has an option to send results you could send it and if it was a false positive the warning would likely disappear at the next signature update. You can also do a scan with another online/standalone AV scanner:

Norton

Trend

Kaspersky

F-Secure

Bitdefender

Read this answer in context 👍 0

All Replies (2)

more options

الحل المُختار

Hi,

It could be a cache entry from a visited website. You can upload the particular file to VirusTotal for a comprehensive analysis with many different scan engines. If MS Security Essentials has an option to send results you could send it and if it was a false positive the warning would likely disappear at the next signature update. You can also do a scan with another online/standalone AV scanner:

Norton

Trend

Kaspersky

F-Secure

Bitdefender

more options

Thanks for taking the time to reply! After several more scans/deletions, the file has stopped appearing (thanks, Lord!).