Category Archives: security

A deeper look at Equation Editor CVE-2017-11882 with encoded Shellcode

Our sample today comes from My Online Security @dvk01uk from this Twitter thread Here.  The First one I had started to work on comes from this Twitter thread  here from April 26 of 2019. The encoding on the shellcode uses … Continue reading

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A look at a bmp file with embedded shellcode

The sample today is from PaulM @melsonp While watching his BSIDES Augusta talk from 2018  Here,  at that the end he shows a picture file that gets downloaded from a layered PowerShell script. He was kind enough to send me … Continue reading

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A Look under the hood of a batch encrypted file

The sample in question today is thanks to a Twitter thread by Nick Carr @ItsReallyNick and Daniel Bohannon @danielhbohannon of FireEye located Here about this builder being used to encode batch scripts. After downloading the sample from VirusBay @virusbay_io that … Continue reading

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Understanding Invoke- “X” Special Character Encoding

I say Invoke- “X” because it can be found in both Invoke-Obfuscation and in Invoke-Dosfucation. We can find a reference to the encoding scheme in this Twitter thread Here where @danielhbohannon references the the blog post from 2010 by @mutaguchi … Continue reading

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What is in this file ?

The other day I was pinged about a very large .jason file that appeared to contain a large  Base 64 string that took up almost all of the file. There was a problem extracting the base64 string do to the … Continue reading

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A closer look at “NetSupport”(Rat) top 2 layers

This post is based on the blog post by FireEye located Here. I was given a private .saz to look at by someone else that gave me the entire infection chain. In this post I will only be doing 2 … Continue reading

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Hidden .Net Resources “Are Your Tools Finding Them” ?

This file was found thru Twitter https://twitter.com/0x7fff9/status/936301229612961792 and https://beta.virusbay.io/sample/browse/106366f1fe0f39232bc86be49ecbad4a This sample appears to be a test piece of Ransomware written in dot Net with 2 binary resources that do not show up in normal tools. No obfuscation was used to … Continue reading

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