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Thunderbird possible Trojan

  • 2 replies
  • 0 have this problem
  • 1 view
  • Last reply by dhunt21

dhunt21
dhunt21
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Whenever I launch Thunderbird, Microsoft Defender (and Malwarebytes) warns me of a possible virus. Scanning my system doesn't seem to find anything. Firefox appears to work normally. Following is info on warning - Malwarebytes www.malwarebytes.com

-Log Details- Protection Event Date: 7/30/22 Protection Event Time: 3:51 PM Log File: 1ba35f88-105a-11ed-9026-f48e38edb898.json

-Software Information- Version: 4.5.12.204 Components Version: 1.0.1725 Update Package Version: 1.0.57967 License: Trial

-System Information- OS: Windows 10 (Build 19044.1826) CPU: x64 File System: NTFS User: System

-Blocked Website Details- Malicious Website: 1 , C:\Program Files\Mozilla Thunderbird\thunderbird.exe, Blocked, -1, -1, 0.0.0, ,

-Website Data- Category: RiskWare Domain: start.thunderbrowse.com IP Address: 45.33.20.235 Port: 80 Type: Outbound File: C:\Program Files\Mozilla Thunderbird\thunderbird.exe


(end)

Whenever I launch Thunderbird, Microsoft Defender (and Malwarebytes) warns me of a possible virus. Scanning my system doesn't seem to find anything. Firefox appears to work normally. Following is info on warning - Malwarebytes www.malwarebytes.com -Log Details- Protection Event Date: 7/30/22 Protection Event Time: 3:51 PM Log File: 1ba35f88-105a-11ed-9026-f48e38edb898.json -Software Information- Version: 4.5.12.204 Components Version: 1.0.1725 Update Package Version: 1.0.57967 License: Trial -System Information- OS: Windows 10 (Build 19044.1826) CPU: x64 File System: NTFS User: System -Blocked Website Details- Malicious Website: 1 , C:\Program Files\Mozilla Thunderbird\thunderbird.exe, Blocked, -1, -1, 0.0.0, , -Website Data- Category: RiskWare Domain: start.thunderbrowse.com IP Address: 45.33.20.235 Port: 80 Type: Outbound File: C:\Program Files\Mozilla Thunderbird\thunderbird.exe (end)

Chosen solution

I discovered that the Thunderbird start page had been hijacked and redirected Thunderbird to thunderbrowse.com which Malwarebytes identified as a high risk site and blocked. I didn't realize that Thunderbird even had a start page, but once I figured it out, it was an easy fix. Thanks for the help.

Dan

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All Replies (2)

david
david
  • Top 10 Contributor
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My guess - and it's just a guess - is that you may have accessed the thunderbrowse website, intentionally or unintentionally. Malwarebytes usually identifies a file to remove. This is not a Thunderbird problem. My suggestion is to follow the Malwarebytes suggestion, and that may require a reinstallation. Another option often offered is to ignore the warning if you feel that there is no threat. I also use the Windows antivirus and Malwarebytes and that has been my experience.

dhunt21
dhunt21 Question owner
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Chosen Solution

I discovered that the Thunderbird start page had been hijacked and redirected Thunderbird to thunderbrowse.com which Malwarebytes identified as a high risk site and blocked. I didn't realize that Thunderbird even had a start page, but once I figured it out, it was an easy fix. Thanks for the help.

Dan