Adversaries may corrupt or wipe the disk data structures on a hard drive necessary to boot a system; targeting specific critical systems or in large numbers in a network to interrupt availability to system and network resources.

Adversaries may attempt to render the system unable to boot by overwriting critical data located in structures such as the master boot record (MBR) or partition table.[1],[2],[3],[4],[5] The data contained in disk structures may include the initial executable code for loading an operating system or the location of the file system partitions on disk. If this information is not present, the computer will not be able to load an operating system during the boot process, leaving the computer unavailable. Disk Structure Wipe may be performed in isolation, or along with Disk Content Wipe if all sectors of a disk are wiped.

On a network devices, adversaries may reformat the file system using Network Device CLI commands such as format.[6]

To maximize impact on the target organization, malware designed for destroying disk structures may have worm-like features to propagate across a network by leveraging other techniques like Valid Accounts, OS Credential Dumping, and SMB/Windows Admin Shares.[1],[2],[3],[4]

References

  1. Symantec. (2012, August 16). The Shamoon Attacks. Retrieved March 14, 2019.
  2. FireEye. (2016, November 30). FireEye Responds to Wave of Destructive Cyber Attacks in Gulf Region. Retrieved November 17, 2024.
  3. Falcone, R.. (2016, November 30). Shamoon 2: Return of the Disttrack Wiper. Retrieved January 11, 2017.
  4. Kaspersky Lab. (2017, March 7). From Shamoon to StoneDrill: Wipers attacking Saudi organizations and beyond. Retrieved March 14, 2019.
  5. Falcone, R. (2018, December 13). Shamoon 3 Targets Oil and Gas Organization. Retrieved March 14, 2019.
  6. Cisco. (2022, August 16). format - Cisco IOS Configuration Fundamentals Command Reference. Retrieved July 13, 2022.

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