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...
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.
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.