Alexandre Gomes alexandreags

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

DLL Execution via Excel.Application RegisterXLL() method

A DLL can be loaded and executed via Excel by initializing the Excel.Application COM object and passing a DLL to the RegisterXLL method. The DLL path does not need to be local, it can also be a UNC path that points to a remote WebDAV server.

When delivering via WebDAV, it should be noted that the DLL is still written to disk but the dropped file is not the one loaded in to the process. This is the case for any file downloaded via WebDAV, and they are stored at: C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV\.

The RegisterXLL function expects an XLL add-in which is essentially a specially crafted DLL with specific exports. More info on XLL's can be found on MSDN

The XLL can also be executed by double-clicking the .xll file, however there is a security warning. @rxwx has more notes on this here inc

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	yum --enablerepo=extras install epel-release
	yum -y install patch dkms kernel-devel perl
	yum update

	curl -o ena_linux_1.5.0.tar.gz https://codeload.github.com/amzn/amzn-drivers/tar.gz/ena_linux_1.5.0
	tar zxvf ena_linux_1.5.0.tar.gz
	mv amzn-drivers-ena_linux_1.5.0 /usr/src/ena-1.5.0

	cat <<EOF > /usr/src/ena-1.5.0/dkms.conf
	PACKAGE_NAME="ena"

	#!/usr/bin/env node

	require(__dirname+"/processor-usage.js").startWatching();

	var shouldRun = true;
	var desiredLoadFactor = .5;

	function blockCpuFor(ms) {
	var now = new Date().getTime();
	var result = 0

	#!/bin/bash
	ROOT_UID=0
	SUCCESS=0
	E_USEREXISTS=70

	# Run as root, of course. (this might not be necessary, because we have to run the script somehow with root anyway)
	if [ "$UID" -ne "$ROOT_UID" ]
	then
	echo "Must be root to run this script."
	exit $E_NOTROOT