Jellyfin's an awesome open source home media server. I'll show you how I use it to organize my movies and TV shows.Part 1 (how I rip media to my computer) he...
My Jellyfin server keeps getting pinged by EMOTET malware lately. Everyone here should be aware if you expose the Jellyfin port to the internet it will get data exfiltration attempts. Use strong passwords.
Oh my. You’re doing it wrong. Exposing the unencrypted connection without the proper security measures is putting yourself at risk. Regardless of how strong you set the password, the connection can still be abused in all manner of ways. If you read the jellyfin documentation, you’d see the developers clearly state you should never do this. You need to put Jellyfin behind server software. Specifically a reverse proxy. I use NGINX. You can setup your connection to be secure this way. You can now also use Cloudflare if you have cache turned off. And if you really wanna go the extra mile, route it behind a VPN. Though this makes it harder for those you share it with or some devices that don’t support VPN.
Please revise your connection. If you need help, feel free to reach out.
You always will. Welcome to the Internet. The difference is whether or not you’ve taken steps to secure your stuff. You need to understand what this malware is looking for. It’s explicitly looking for unsecured services. Such as WordPress, SQL, etc. There are inexperienced users out there that inadvertently expose themselves. I see this type of probing at work and at home. Don’t overly stress it. My home server has been running for a decade without issues. Just keep it updated and read before you make any changes if you don’t fully understand the implications.
My home based server is behind a pfsense firewall. Runs Arch. Everything is in a non-root docker container. SELinux is enforced. All domains are routed through Cloudflare. Some use Cloudflare Zero Trust.
Mines behind an NGINX reverse proxy as well. EMOTET is a very advanced malware and can get around those now. My IDS detected data exfiltration to an unknown Brazilian IP, and I have a VPN with an IP tunnel on top of my reverse proxy, as well as everything on port 443. It still found a way.
If it found a way, then your server configuration is inadequate. Are you using old ciphers or protocols? Missing headers? Wrong headers? Something doesn’t add up here.
I have a refurbished server rack system that is running Zeek and also Suricata. I have a managed switch that will duplicate all network traffic to the system that is running those applications and a JBOD setup to store the countless logs. I have scoured through nearly all the CISA documents and alert reports to copy the various Snort rules they mention in each report and also purchased a specific modem to connect with my ISP that provides a service to monitor my traffic that has Minim.
I am a cybersecurity expert and still don’t know what I’m doing most of the time, so this is literally scratching the surface, as well as only detecting threats not really stopping them which requires more knowledge.
This is the biggest downfall of Emby/Jellyfin IMO. It’s a tradeoff from being reliant on Plex’s authentication servers, but requires a lot of technical knowledge to setup correctly (rather than just port forwarding and relying on a strong password).
I have a refurbished server rack system that is running Zeek and also Suricata. I have a managed switch that will duplicate all network traffic to the system that is running those applications and a JBOD setup to store the countless logs. I have scoured through nearly all the CISA documents and alert reports to copy the various Snort rules they mention in each report and also purchased a specific modem to connect with my ISP that provides a service to monitor my traffic that has Minim.
I am a cybersecurity expert and still don’t know what I’m doing most of the time, so this is literally scratching the surface, as well as only detecting threats not really stopping them which requires more knowledge.
My Jellyfin server keeps getting pinged by EMOTET malware lately. Everyone here should be aware if you expose the Jellyfin port to the internet it will get data exfiltration attempts. Use strong passwords.
Oh my. You’re doing it wrong. Exposing the unencrypted connection without the proper security measures is putting yourself at risk. Regardless of how strong you set the password, the connection can still be abused in all manner of ways. If you read the jellyfin documentation, you’d see the developers clearly state you should never do this. You need to put Jellyfin behind server software. Specifically a reverse proxy. I use NGINX. You can setup your connection to be secure this way. You can now also use Cloudflare if you have cache turned off. And if you really wanna go the extra mile, route it behind a VPN. Though this makes it harder for those you share it with or some devices that don’t support VPN.
Please revise your connection. If you need help, feel free to reach out.
I have nginx setup and acessing through a Cloudflare tunnel but still getting EMOTET issues detected by my IDS.
May I ask what I should look for in the log files to detect this (and so I can configure fail2ban correctly)?
First read this
Then use the following:
alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (msg:“[CIS] Emotet C2 Traffic Using Form Data to Send Passwords”; content:“POST”; http_method; content:“Content-Type|3a 20|multipart/form-data|3b 20|boundary=”; http_header; fast_pattern; content:“Content-Disposition|3a 20|form-data|3b 20|name=|22|”; http_client_body; content:!“------WebKitFormBoundary”; http_client_body; content:!“Cookie|3a|”; pcre:“/:?(chrome|firefox|safari|opera|ie|edge) passwords/i”; reference:url,cofense.com/flash-bulletin-emotet-epoch-1-changes-c2-communication/; sid:1; rev:2;)
And the following:
alert tcp any any -> any $HTTP_PORTS (msg:“EMOTET:HTTP URI GET contains ‘/wp-content/###/’”; sid:00000000; rev:1; flow:established,to_server; content:“/wp-content/”; http_uri; content:“/”; http_uri; distance:0; within:4; content:“GET”; nocase; http_method; urilen:<17; classtype:http-uri; content:“Connection|3a 20|Keep-Alive|0d 0a|”; http_header; metadata:service http;)
And also this one:
alert tcp any any -> any $HTTP_PORTS (msg:“EMOTET:HTTP URI GET contains ‘/wp-admin/###/’”; sid:00000000; rev:1; flow:established,to_server; content:“/wp-admin/”; http_uri; content:“/”; http_uri; distance:0; within:4; content:“GET”; nocase; http_method; urilen:<15; content:“Connection|3a 20|Keep-Alive|0d 0a|”; http_header; classtype:http-uri; metadata:service http;)
You always will. Welcome to the Internet. The difference is whether or not you’ve taken steps to secure your stuff. You need to understand what this malware is looking for. It’s explicitly looking for unsecured services. Such as WordPress, SQL, etc. There are inexperienced users out there that inadvertently expose themselves. I see this type of probing at work and at home. Don’t overly stress it. My home server has been running for a decade without issues. Just keep it updated and read before you make any changes if you don’t fully understand the implications.
My home based server is behind a pfsense firewall. Runs Arch. Everything is in a non-root docker container. SELinux is enforced. All domains are routed through Cloudflare. Some use Cloudflare Zero Trust.
Mines behind an NGINX reverse proxy as well. EMOTET is a very advanced malware and can get around those now. My IDS detected data exfiltration to an unknown Brazilian IP, and I have a VPN with an IP tunnel on top of my reverse proxy, as well as everything on port 443. It still found a way.
If it found a way, then your server configuration is inadequate. Are you using old ciphers or protocols? Missing headers? Wrong headers? Something doesn’t add up here.
Don’t expose anything directly to the Internet except a VPN with strong auth.
Get a reverse proxy and strong passwords if you share with your loved ones.
There’s Wireshark for Android. Put your public key on the phone and you’re almost done.
edit: right, Wireguard
You’re thinking of WireGuard. WireGuard is a packet capture software.
You’re thinking of Wireshark. WireGuard is a VPN.
(Yes! Someone bit!) You’re thinking of TorGuard. Wireshark is when discovery channel spends a whole week talking about sharks.
Nothing like using someone’s own comment structure to correct their correction. All in good fun though.
I’ve got one, I prefer the VPN method.
Why not use a reverse proxy to keep everything on port 443 behind your own domain or duckdns? /gen
Can you link a good resource for me to set this up myself ? To many similar but different guides and my ADD makes it impossible to reach the goal.
Look up Caddy V2 probably the most dead simple reverse proxy I’ve seen and they have solid documentation
I do this already and also am inside an encrypted Cloudflare tunnel… Still getting EMOTET warnings from my IDS.
How are you detecting/monitoring it. I would like to do the same in my server
I have a refurbished server rack system that is running Zeek and also Suricata. I have a managed switch that will duplicate all network traffic to the system that is running those applications and a JBOD setup to store the countless logs. I have scoured through nearly all the CISA documents and alert reports to copy the various Snort rules they mention in each report and also purchased a specific modem to connect with my ISP that provides a service to monitor my traffic that has Minim.
I am a cybersecurity expert and still don’t know what I’m doing most of the time, so this is literally scratching the surface, as well as only detecting threats not really stopping them which requires more knowledge.
This is the biggest downfall of Emby/Jellyfin IMO. It’s a tradeoff from being reliant on Plex’s authentication servers, but requires a lot of technical knowledge to setup correctly (rather than just port forwarding and relying on a strong password).
Plex was how last pass got hacked. https://www.howtogeek.com/147554/lastpass-data-breach-shows-why-plex-updates-are-important/
You still need to do stuff even if it is plex.
Get a reverse proxy. Ping me if you need details. All my stuff is hidden behind port 443.
Use it behind a VPN
How can you see that?
deleted by creator
That link doesn’t work :/
I will simply copy/paste here then:
Tailscale works nicely as well
deleted by creator