Deletes itself

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

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

Checks for any installed AV software in registry

Checks installed software on the system

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

Writes to the Master Boot Record (MBR)

Bootkits write to the MBR to gain persistence at a level below the operating system.

Checks system information in the registry

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