Windows

Do you know all of the default Windows file formats? I’ve certainly seen a few in my time, though I can’t say I’ve seen a corpus of all the samples in one place.

Where we last left off, I had done an initial reverse engineering pass of Windows Update Delivery Optimization see: DOing Harm. I got familiar with the protocol, how peer discovery works, etc… but mainly only looked at the first handshake as that was most interesting to me at the time.

There’s this thing called Windows Delivery Optimization which allows “you to get Windows updates and Microsoft Store apps from sources in addition to Microsoft, like other PCs on your local network, or PCs on the internet that are downloading the same files.”

Earlier this month, I came back around to seriously considering an attempt at bitsquatting. While the prior link goes into great depth on the topic, I will attempt to give a very high level overview here: