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Use a virtual machine if it's a computer virus; never open it on your physical machine. As a precaution, download them on your VM.
If it's an APK file, use an emulator.
More information on Virtual Machines (VM)
More information on APK Emulators
Scroll past the following section to see about this community.
Pynx Technologies is a company that has cybersecurity tools, pentesting tools, etc. It sells at the moment SSkullzv2 and Skullzv3.
Root Password Phishing (Bash) Alias Command Version Instructions by Lynx
Example Login Program (Python), (Password is "password"), by Lynx
Cerbios Ransomware (Python) by Pynx
SSH Brute (Python | ZIP) by Pynx
Tokyo Chat by Pynx