Downloader, self signed certificate in certificate chain

[skysail]

You need to make sure that whatever is adding a self-signed certificate to your chain stops doing that. Do you use any antivirus? See this for more details:

@skysail

Proxies

Issue
Your internet connection is behind a proxy or is being intercepted. There are multiple reasons why this might be the case, here are a few examples:

• You are using a work computer that has a proxy set up by default
• You are using a proxy for personal/security reasons
• Your anti-virus is intercepting all traffic to scan for malware
• Your anti-virus/network security software has installed a self-signed certificate to encrypt insecure connections
• You have tried to reverse-engineer our or someone else’s applications using reverse-proxy tools like Wireshark, Charles, and the BURP suite and then forgot to turn it off.
• You have been infected with malware that is now actively deploying a MITM (Man-in-the-middle) attack towards you.

Proposed solutions

• Disable any proxies
• Investigate if turning off any anti-virus solves the issue
• Disable any active reverse proxies
• Investigate if your antivirus has any features related to scanning/intercepting network traffic. If it does, try to find related settings and turn them off temporarily to see if that resolves the issue.
• Run virus scans for the whole system. Also, run a rootkit scanner such as this one .

Kind Regards,
Malte