J Jymit

Program Analysis Resources

(draft; work in progress)

Running Hashcat on Google Cloud's GPU-based VMs

In February 2017, Google announced the availability GPU-based VMs. I spun up a few of these instances, and ran some benchmarks. Along the way, I wrote down the steps taken to provision these VM instances, and install relevant drivers.

Update April 2019: Updated instructions to use instances with the Tesla T4 GPUs.

Kafka Cheat Sheet

Display Topic Information

$ kafka-topics.sh --describe --zookeeper localhost:2181 --topic beacon
Topic:beacon	PartitionCount:6	ReplicationFactor:1	Configs:
	Topic: beacon	Partition: 0	Leader: 1	Replicas: 1	Isr: 1
	Topic: beacon	Partition: 1	Leader: 1	Replicas: 1	Isr: 1

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

	<a[1]href[2]=[3]"[4]java[5]script:[6]alert(1)">

	[1]
	Bytes:
	\x09 \x0a \x0c \x0d \x20 \x2f

	<a/href="javascript:alert(1)">
	<a\x09href="javascript:alert(1)">

	[2,3]

	-----------------------------------------------------------------------------------------------------
	Common Ways to Run a Bash Script

	You can execute a Bash script in several different ways, each affecting:

	Which shell runs it,

	Whether a new shell process is created,

	Which environment variables are used, and

	#!/usr/bin/env bash
	set -o errexit
	set -o nounset
	set -o pipefail

	# For one project only
	# Please make sure to run `gcloud config set project <project_id> first`

	command -v gcloud >/dev/null 2>&1 \|\| \
	{ echo >&2 "I require gcloud but it's not installed. Aborting.";exit 1; }

	Set-ExecutionPolicy Unrestricted;
	iex ((New-Object System.Net.WebClient).DownloadString('http://boxstarter.org/bootstrapper.ps1'));
	get-boxstarter -Force;
	Install-BoxstarterPackage -PackageName 'https://gist.github.com/OALabs/afb619ce8778302c324373378abbaef5/raw/4006323180791f464ec0a8a838c7b681f42d238c/oalabs_x86vm.ps1';

	[POWERSHELL-DOWNLOAD-HUNT]
	dispatch.earliest_time = -24h@h
	dispatch.latest_time = now
	dispatchAs = user
	display.general.type = statistics
	display.page.search.mode = verbose
	display.page.search.tab = statistics
	display.visualizations.charting.chart = bar
	display.visualizations.show = 0
	search = FileName=powershell.exe (CommandLine=DownloadFile OR CommandLine=invoke-webrequest) \| stats values(CommandLine) as "commands" by ComputerName

J Jymit

Program Analysis Resources

Running Hashcat on Google Cloud's GPU-based VMs

Kafka Cheat Sheet

Requirements

Prerequisites