Deletes itself

Executes dropped EXE

Loads dropped DLL

Reads data files stored by FTP clients

Tries to access configuration files associated with programs like FileZilla.

Reads user/profile data of web browsers

Infostealers often target stored browser data, which can include saved credentials etc.

UPX packed file

Detects executables packed with UPX/modified UPX open source packer.

Unexpected DNS network traffic destination

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

Adds Run key to start application

Checks installed software on the system

Looks up Uninstall key entries in the registry to enumerate software on the system.

Maps connected drives based on registry

Disk information is often read in order to detect sandboxing environments.

Suspicious use of SetThreadContext