Using Ubuntu MRT to Fix Malware on a Windows Machine: *Nix Saves Windows

A family member brought me their malware-infested machine.  It was the worst infection I had seen in a while. First off, this device had some annoying malware, including: Continue reading “Using Ubuntu MRT to Fix Malware on a Windows Machine: *Nix Saves Windows”

OS X Recovery Partition: Customizing With Different Apps

Originally, I wanted to use Casper Imaging  from the Recovery partition.  So this post is based off of this article and this feature request on JAMF Nation.  At the end, I realized I probably wouldn’t be able to add this app to the Recovery HD until JAMF updates it to 64-bit.  However, this process seems to work for other 64-bit apps.  The example I use in this walkthrough is Continue reading “OS X Recovery Partition: Customizing With Different Apps”

Raspberry Pi + Cantenna: Ultimate 2.4GHz Wardriving and Long-range WiFi Access

Want to turn your Raspberry Pi into a portable antenna / wireless router that can be used to pick up WiFi signals from great distances?  I did.  I will walkthrough how to make the 2.4GHz cantenna using some cheap components and then setup the Pi as a router so you could search for WiFi access points, connect to them, and potentially relay the signal. Great for wardriving or just connecting to your home Wi-Fi from out in the backyard. Continue reading “Raspberry Pi + Cantenna: Ultimate 2.4GHz Wardriving and Long-range WiFi Access”

OS X: Roll-your-own Malware Detection

[UPDATE 2014-10-20]: This tricks seems to cause high CPU usage in Yosemite, try using launchd instead.

[UPDATE 2014-10-02]: defend yourself from becoming a zombie courtesy of Mac.BackDoor.iWorm

[UPDATE]: Use this trick to fend off the new malware XLSCmd

Macs are not immune to malware.  Authors of malicious software often try to get a LaunchDaemon or LaunchAgent installed onto your computer in one or more of the following locations: Continue reading “OS X: Roll-your-own Malware Detection”

Automator: Scale Down Large Images From the Contextual-menu

Automator seems to be one of those unknown or ignored Apple-made apps.  But it is very powerful and can save you a lot of time.  It has also been part of OS X for a long time.


To save time by automatically scaling down images (while keeping the original file) to a pre-set size as opposed to manually editing each one.

Requirements For This Walkthrough


  1. Mac with OS X
  2. Large image files


  1. Automator workflow

Knowledge, Skills, and Abilities

  • Ability to navigate throughout a computer OS
  • Knowledge of basic computer terminology

Step-by-step Instructions

Create the Automator Workflow

You can also download a a pre-built workflow.

  1. Create a folder for the scaled-down images to go
  2. Open /Applications/Automator
  3. Create a workflow similar to the following: (editing the folder and size fields)jacob_salmela_automator_workflow_reduce_image
  4. Click File > Save
  5. Save as something like Reduce to 800×600

Use The New Contextual Service

  1. Right-click a large image file
  2. Click Reduce to 800×600jacob_salmela_resize
  3. Watch the magic happen

The scaled-down image will now be revealed in the folder you designated.  The original remains in-tact.  This operation can also be completed on many files at once.  In this example, the picture was 1.8MB and was reduced to 144K.