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Zlib just made a windows app, but is it a ransomware
(www.virustotal.com)
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this post was submitted on 21 Jun 2023
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Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ
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Don't know about that app, but it is very easy to create a file that contains malicious code that is not flagged on virustotal at all.
'joe sandbox' and 'hybrid analysis' offer online services where the file gets executed to test it for malicious behaviour. Of course a seasoned malware developer can detect sandboxes and make the malware hide itself while inside the default sandboxes.
Just avoid running random binaries from untrusted sources; prefer open source or, if you must, use a hardened sandbox VM yourself to run untrusted code.
so you're saying there's no way to know if a file is safe or not, i mean there's very trusted sources in this community. how should we know then?? and is running a vm really safe? what do you mean by hardened sandbox vm?
Oh, of course there is a way. Just open the binary in radare2/rizin/ghidra and look for suspicious code. Of course this is quite time consuming to do this with a binary file, so if you compile opensource code yourself you can at least read the annotated source. If you do not have the expertise to do this, you have to choose who you trust and be careful in general.
A sandbox VM can be just a Linux or Windows VM that is running on your local hypervisor and properly firewalled and configured for security, or in a container (less secure). If a software goes rogue it will likely infect only the VM (unless it knows a hypervisor escape). Proper virtual firewalling can help protect your home LAN.
An operating system that helps you do all this without requiring too much manual work is for example QubesOS.