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Source: h-online

At the Black Hat security conference, Austrian IT security specialist Peter Kleissner presented a bootkit called Stoned which is capable of bypassing the TrueCrypt partition and system encryption. A bootkit combines a rootkit with the ability to modify a PC’s Master Boot Record, enabling the malware to be activated even before the operating system is started.

Available as source code, Kleissner’s bootkit can infect any currently available 32-bit variety of Windows from Windows 2000 to Windows Vista and the Windows 7 release candidate. Stoned injects itself into the Master Boot Record (MBR), a record which remains unencrypted even if the hard disk itself is fully encrypted. During startup, the BIOS first calls the bootkit, which in turn starts the TrueCrypt boot loader. Kleissner says that he neither modified any hooks, nor the boot loader, itself to bypass the TrueCrypt encryption mechanism. The bootkit rather uses a “double forward” to redirect I/O interrupt 13h, which allows it to insert itself between the Windows calls and TrueCrypt. Kleissner tailored the bootkit for TrueCrypt using the freely available TrueCrypt source code.

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Comments on: "Bootkit bypasses hard disk encryption" (2)

  1. Dagenham said:

    Sounds interesting and creepy also. Have you tried the bootkit? At the moment, I do not have an encrypted system.

    • notictech said:

      I haven’t but i try to encrypt my hd once and it was a mess çause I restart the PC before it complete the full hd encryption. well nothing is completely secured in this day’s. God bless

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