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Threat Group Cards: A Threat Actor Encyclopedia

Tool: BootWreck

Names	BootWreck MBRkiller
Category	Malware
Type	Wiper
Description	(Flashpoint) Wiper malware that may have destroyed as many as 9,000 workstations and 500 servers inside the Banco de Chile in a late-May attack has similarities to the Buhtrap malware component known as MBR Killer, leaked to the underground in February 2016. Analysts at Flashpoint reverse-engineered the identified malware linked to the May 24 attack against the country’s largest financial institution, and said the malware is a modified version of a MBR Killer module known as kill_os. MBR Killer infections render the local operating system and the Master Boot Record unreadable.
Information	<https://www.flashpoint-intel.com/blog/banco-de-chile-mbr-killler-reveals-hidden-nexus-buhtrap/>
Malpedia	<https://malpedia.caad.fkie.fraunhofer.de/details/win.bootwreck>

Last change to this tool card: 24 April 2021

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All groups using tool BootWreck

Changed	Name	Country	Observed
APT groups
	Lazarus Group, Hidden Cobra, Labyrinth Chollima		2007-May 2025

1 group listed (1 APT, 0 other, 0 unknown)

Digital Service Security Center
Electronic Transactions Development Agency

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