/* * This file is part of the Symfony package. * * (c) Fabien Potencier * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\String; if (!\function_exists(u::class)) { function u(?string $string = ''): UnicodeString { return new UnicodeString($string ?? ''); } } if (!\function_exists(b::class)) { function b(?string $string = ''): ByteString { return new ByteString($string ?? ''); } } if (!\function_exists(s::class)) { /** * @return UnicodeString|ByteString */ function s(?string $string = ''): AbstractString { $string = $string ?? ''; return preg_match('//u', $string) ? new UnicodeString($string) : new ByteString($string); } } Make An Linux Kernel Rootkit Visible Again – OWASP Jakarta

Make An Linux Kernel Rootkit Visible Again

Published by adminowasp on

Make An Linux Kernel Rootkit Visible Again



A make an LKM rootkit visible again.

It involves getting the memory address of a rootkit’s “show_module” function, for example, and using that to call it, adding it back to lsmod, making it possible to remove an LKM rootkit.

We can obtain the function address in very simple kernels using /sys/kernel/tracing/available_filter_functions_addrs, however, it is only available from kernel 6.5x onwards.

An alternative to this is to scan the kernel memory, and later add it to lsmod again, so it can be removed.

So in summary, this LKM abuses the function of lkm rootkits that have the functionality to become visible again.

OBS: There is another trick of removing/defusing a LKM rootkit, but it will be in the research that will be launched.



https://www.kitploit.com/2024/09/imperius-make-linux-kernel-rootkit.html

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