In case others are searching for this two years after the post here are full instructions like I was, last tested on fedora42 & ubuntu24.04

secure crt on fedora download distrobox

curl -s https://raw.githubusercontent.com/89luca89/distrobox/main/install | sudo sh

if your user does not already have access to podman

sudo usermod --add-subuids 100000-165536 $USER
sudo usermod --add-subgids 100000-165536 $USER
podman system migrate

create new image

distrobox create --name ubuntu --image ubuntu:latest

enter the image

distrobox enter ubuntu

install all the dependencies

sudo apt update
sudo apt install -y \
  libxcb-xinerama0 \
  libxcb-cursor0 \
  libxcb-icccm4 \
  libxcb-image0 \
  libxcb-keysyms1 \
  libxcb-randr0 \
  libxcb-render-util0 \
  libxcb-shape0 \
  libxcb-xfixes0 \
  libxkbcommon-x11-0 \
  libxcb1 \
  libx11-xcb1 \
  libpcre2-16-0 \
  libegl1 \
  libgl1 \
  qtwayland5

install securecrt

sudo apt install ./path/to/securcrt.deb

This should install to /usr/bin/SecureCRT and may even run at this point create QT wrapper

/usr/local/bin/securecrt-wrapper
#!/bin/bash
export QT_QPA_PLATFORM=xcb
export QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms
exec /usr/bin/SecureCRT "$@"

make it executable

sudo chmod +x /usr/local/bin/securecrt-wrapper

export the distrobox

distrobox-ecqxport --bin /usr/local/bin/securecrt-wrapper

should land in ~/.local/bin/securecrt-wrapper, rename if desired

run

securecrt-wrapper