ASPack v2.12-2.42

Detects executables packed with ASPack v2.12-2.42

Deletes itself

Loads dropped DLL

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.

Writes to the Master Boot Record (MBR)

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