Technical articles I have written over the years (I don't write too often).
ELF
in-memory-only fd-less ELF execution (with Perl)
vx
House of Pain: A practical approach for an x86-64 ELF virus
Linux.Linkin.pl: Another Perl x64 ELF virus
perljam.pl: A Perl x64 ELF virus
Perl
Executing assembly shellcode on-the-fly with Perl
Perl hacking I: PEEK & POKE & XSUB
Exploits
Prontus LFI (spanish)
Prontus RCE (CVE-2019-15503) (spanish)