Executes dropped EXE

Loads dropped DLL

Unexpected DNS network traffic destination

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

Writes a Windows system DLL name to a user directory

A module named after a system DLL outside System32 can be loaded instead of the real one by a program searching that directory.

Checks installed software on the system

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

Network Service Discovery

Attempt to gather information on host's network.

Writes to the Master Boot Record (MBR)

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