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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Thousands of Linux systems infected by "perfctl" malware since 2021 (arstechnica.com)

submitted 2 months ago by SuperFola to c/[email protected]

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TLDR: perfctl is a crypto mining and proxy jacking malware that exploits about 20’000 common missconfigurations to install itself on Linux servers. Mostly using a 10/10 CVE on Apache RocketMQ.

It is very persistent and can reinstall itself even when you have deleted all the perfctl and perfcc files. It hides itself by removing logs, network packets, and stopping all activity once you login to the machine.

Monitoring cpu usage using tools (I use net data on my server) can help identify infections (100% cpu usage when « idle »).

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[–] [email protected] 1 points 2 months ago* (last edited 2 months ago)

I will never understand people using 3rdparty MQ and RPC implementations. What a a PR for rocketMQ right here.

You can and you should implement your communication protocols, most of the time 3rdparties are very wasteful and a security liability. I like ZeroMQ (https://zeromq.org/), they have amazing tech guides (https://zguide.zeromq.org/). I still mostly do my own code.

I may have trust issues but sockets are not THAT hard, they're just amzaingly frustrating to debug, not as much as debuging 3rdparty code.