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By itsMe
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Give reaction to this post to see the hidden content. JSshell – a JavaScript reverse shell. This using to exploit XSS remotely, help to find blind XSS, …
This tool works for both Unix and Windows operating system and it can be running with both Python 2 and Python 3. This is a big update of JShell – a tool to get a JavaScript shell with XSS by s0med3v. JSshell also doesn’t require Netcat (different from other javascript shells).
New in JSshell version 2.9
Updated in the new version of JShell 2.9:
New JSshell command: cookie -> allows to view the cookies of the current user who established the shell
Support javascript function:
Fixed some bugs
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By itsMe
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Give reaction to this post to see the hidden content. Reverse PowerShell
Functions that can be used to gain Reverse Shells with PowerShell. Invoke-ReversePowerShell function can be used to connect to Start-Listener as well as netcat and Metasploit modules or whatever other listeners you use. This is a PowerShell module meaning it only contains functions/cmdlets to be imported into a PowerShell session. If you wish to execute one of the commands whenever the file is run just add the command you wish to execute to the bottom of the file.
BLUE TEAM DISCOVERY
Find-ReverseShell.ps1 can be used to search the Windows Event Log for when a Reverse Shell is created that uses a System.Net.Sockets.TcpListener object. This will discover any reverse shell that creates a TcpListener object and not just the below module. This method does not catch PowerCat.ps1 which I am still looking for a good way to discover. This part is still a work in progress.
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By itsMe
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Give reaction to this post to see the hidden content. C# Azure Function with an HTTP trigger that generates obfuscated PowerShell snippets that break or disable AMSI for the current process. The snippets are randomly selected from a small pool of techniques/variations before being obfuscated. Every snippet is obfuscated at runtime/request so that no generated output share the same signatures.
What is AMSI?
As f-secure explained in one of their excellent blog-posts:
AMSI is an interface on which applications or services (third-party included) are able to scan a script’s content for malicious usage. If a signature in the script is registered by the AMSI antimalware service provider (Windows Defender by default), it will be blocked. To put this into context, consider the following steps PowerShell takes to integrate with AMSI:
When a PowerShell process is created, AMSI.DLL is loaded from disk into its address space. Within AMSI.DLL, there’s a function known as AmsiScanBuffer(), essentially the function used to scan a script’s content. In the PowerShell command prompt, any supplied content would first be sent to AmsiScanBuffer(), before any execution takes place. Subsequently, AmsiScanBuffer() would check with the registered anti-virus to determine if any signatures have been created. If the content is deemed malicious, it would be blocked. Since AMSI relies on being loaded within the process executing the actual script, techniques to break or patch specific functions within amsi.dll are well known.
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By itsMe
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Give reaction to this post to see the hidden content. xeca is a project that creates encrypted PowerShell payloads for offensive purposes.
Creating position independent shellcode from DLL files is also possible.
How It Works
Identify and encrypt the payload. Load encrypted payload into a powershell script and save to a file named “launch.txt”
The key to decrypt the payload is saved to a file named “safe.txt”
Execute “launch.txt” on a remote host
The script will call back to the attacker defined web server to retrieve the decryption key “safe.txt”
Decrypt the payload in memory
Execute the intended payload in memory
Changelog v0.3
ETW and Script Block Logging bypass added to all payloads.
The bypasses can be disabled with –disable-etw and –disable-script-logging.
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By itsMe
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Give reaction to this post to see the hidden content. This project is a simple collection of various shellcode injection techniques, aiming to streamline the process of endpoint detection evaluation, besides challenging myself to get into the Golang world.
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