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Saket Upadhyay
Saket Upadhyay

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Mar 19

What exactly is {4d36e978-e325–11ce-bfc1–08002be10318} in the PowerShell script?
1

Dony Thomas

What is {4d36e978-e325–11ce-bfc1–08002be10318}?

What is {4d36e978-e325–11ce-bfc1–08002be10318}? This string is something called “ClassGuid” [3] for USB device class drivers, “Windows categorizes devices by device setup classes, which indicate the functionality of the device.”[1]; As mentioned in [1], {4d36e978-e325–11ce-bfc1–08002be10318} class id corresponds to “Communications and CDC Control (02h)”. Scope This specific driver was enabled in Windows 10 and supports Windows 10 Desktop, Mobile, and Windows 11.

1 min read

1 min read


Published in InfoSec Write-ups

·May 30, 2022

Serial Communication with Raspberry Pi Pico in Windows 10/11 via WSL

Raspberry Pi Pico “Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces” ~raspberrypi.com/documentation/microcontrollers/raspberry-pi-pico The microcontroller can be programmed in MicroPython or C/C++. For more information, check the Official Website. Setting up WSL 🪟 If you haven't already, set up WSL in your Windows 10/11 machine by following Microsoft’s official guide :

Serial Communication

3 min read

Serial Communication with Raspberry Pi Pico in Windows 10/11 via WSL
Serial Communication with Raspberry Pi Pico in Windows 10/11 via WSL
Serial Communication

3 min read


Oct 8, 2021

How to create a Certificate Signing Request in 2021 (Windows 11/10)?

How to create your own CSR for SSL implementation. What is a CSR? A certificate signing request (CSR) is the initial step to implement SSL/TLS on your server. The CSR is generated in the target server itself and contains important information about your server like — domain, country, owner details and general contact details…

Ssl

3 min read

How to create a Certificate Signing Request (CSR) in 2021 (Windows 11/10)?
How to create a Certificate Signing Request (CSR) in 2021 (Windows 11/10)?
Ssl

3 min read


Published in InfoSec Write-ups

·Jun 27, 2021

How to unpack UPX packed malware with a SINGLE breakpoint

Dynamically unpacking UPX payload from memory. What is UPX? Ultimate Packer for eXecutables (UPX) is a free and opensource executable packer. This usually is short for “runtime packers” which are also known as “self-extracting archives”. Software that unpacks itself in memory when the “packed file” is executed. Sometimes this technique is also called…

Malware

6 min read

How to unpack UPX packed malware with a SINGLE breakpoint
How to unpack UPX packed malware with a SINGLE breakpoint
Malware

6 min read


Jun 13, 2021

Using ‘symlinks’ to create embedded CLI applications in C/C++

Use one CLI application for multiple CL entry points. Our Goal To create symbolic links which will execute different code section but will point to same program. Background Theory What is a symlink? A symlink (symbolic link) is essentially a pointer to a file or folder located elsewhere, consumes little space and is very fast to create (compared…

Linux

4 min read

Using ‘symlinks’ to create embedded CLI applications in C/C++
Using ‘symlinks’ to create embedded CLI applications in C/C++
Linux

4 min read


Published in InfoSec Write-ups

·Jun 6, 2021

‘modprobe’ for digital peace of mind 🍃

Add and remove modules from the Linux Kernel for digital privacy. What is modprobe you ask? modprobe intelligently adds or removes a module from the Linux kernel. modprobe looks in the module directory /lib/modules/`uname -r` for all the modules and other files, except for the optional configuration files in the /etc/modprobe.d directory. ~(man)ual pages Kernel and Kernel Modules in Linux In…

Digital Privacy

3 min read

‘modprobe’ for digital peace of mind 🍃
‘modprobe’ for digital peace of mind 🍃
Digital Privacy

3 min read


Published in InfoSec Write-ups

·May 14, 2021

Reversing Microsoft’s Windows95 Product Key Check Mechanism

A blast into the past to see what it took to be secure 25 years ago! Disclaimer Microsoft Windows95 is the registered property of Microsoft Corporation® and released for general use on August 24, 1995. …

Reverse Engineering

8 min read

Reversing Microsoft’s Windows95 Product Key Check Mechanism.
Reversing Microsoft’s Windows95 Product Key Check Mechanism.
Reverse Engineering

8 min read


Published in InfoSec Write-ups

·May 7, 2021

5 Step Pre-built Malware Analysis Lab

Set up your own prebuilt-Windows10 based malware analysis lab in Hyper-V Creating your own malware analysis lab can be time consuming and hectic, to setup all the tools required might take 2–3 days if not a whole week for a beginner. It took me 2 weeks to develop a stable…

Malware Analysis

5 min read

5 Step Pre-built Malware Analysis Lab
5 Step Pre-built Malware Analysis Lab
Malware Analysis

5 min read


Published in InfoSec Write-ups

·Dec 8, 2020

Why RSA is NOT used to encrypt LARGE files?

Practical Understanding of Public-Key based Encryption Strategies and their Efficiency. But then why do PGP / GPG and other encryption tools have "encrypt with RSA" option? And, what’s even the use of this if we can’t use it to encrypt large files? Are you saying RSA is useless? …

Rsa

5 min read

Why RSA is NOT used to encrypt LARGE files?
Why RSA is NOT used to encrypt LARGE files?
Rsa

5 min read


Nov 21, 2020

How To Secure Your Work like a Pro.

Utilizing PGP Keys to Encrypt Everything you have. If have some super private or confidential data on your computer and don’t want anyone to have it, even if they have login access of your computer, then you already know the answer to “Why should we do this”. Now all that…

Gpg

7 min read

How To Secure Your Work like a Pro.
How To Secure Your Work like a Pro.
Gpg

7 min read

Saket Upadhyay

Saket Upadhyay

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CS Ph.D. Student @ University of Virginia.

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