Adversaries may overwrite or corrupt the flash memory contents of system BIOS or other firmware in devices attached to a system in order to render them inoperable or unable to boot, thus denying the availability to use the devices and/or the system.(Citation: Symantec Chernobyl W95.CIH) Firmware is software that is loaded and executed from non-volatile memory on hardware devices in order to initialize and manage device functionality. These devices may include the motherboard, hard drive, or video cards. In general, adversaries may manipulate, overwrite, or corrupt firmware in order to deny the use of the system or devices. For example, corruption of firmware responsible for loading the operating system for network devices may render the network devices inoperable.(Citation: dhs_threat_to_net_devices)(Citation: cisa_malware_orgs_ukraine) Depending on the device, this attack may also result in [Data Destruction](https://attack.mitre.org/techniques/T1485).

Linked Issues

Issuelinks
Linktype Issue
is related to Techniques
is blocked by Update Software
is blocked by Firmware Modification via Flash Tool or Corrupted Firmware Upload
is blocked by Privileged Account Management
is blocked by Boot Integrity
is blocked by Asset Inventories
is blocked by Configuration Change Control
is blocked by Access Restriction For Change
is blocked by Secure Baseline Configurations
is blocked by Endpoint File Integrity Monitoring (FIM)
is blocked by Separation of Duties (SoD)
is blocked by Identification & Authentication for Organizational Users
is blocked by Cryptographic Module Authentication
is blocked by Account Management
is blocked by Access Enforcement
is blocked by Least Privilege
is blocked by Criticality Analysis During Development
is blocked by Security, Compliance & Resilience Testing Throughout Development
is blocked by Developer Configuration Management
is blocked by Software & Firmware Patching
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