For example, any recent Dell's BIOS images can be extracted with a script in found in BIOSUtilities repo.Īs a handy sample, here is the Dell BIOS image we will analyze in thisĪs highlighted, the function is set as a callback for theĮvent that is called right before the OS boot loader starts. There are two easy ways to get a BIOS image to analyze:Įxtracting from an update package or using CHIPSEC.īIOS images may be extracted from BIOS update packages OEMs Out of curiosity, I started to reverse engineer it, then decided to write up the steps I took because I believed this area needed more engineers' scrutiny and tutorials for it. I read multiple articles about its internals in the pastīut did not know much about the modules embedded in the firmware. Persistence technology isĮmbedded in more than half a billion devices worldwide. The firmware, replacing the hard drive, reimaging the device, or resetting theĭevice back to factory settings, Persistence technology will trigger anĪutomatic reinstallation of the software client. If the software client is removed from a device through flashing The Persistence module is activated once the Absolute agent Persistence technology, which is embedded into the firmware of most computers, Absolute's flagship product is the Absolute Platform,įormerly known as Data and Device Security (DDS).
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