![]() Despite these available security measures, platform manufacturers are not obligated to use them. For example, it offers a framework for secure boot, authenticated variables at boot-time, and TPM initialization security. Unified Extensible Firmware Interface (UEFI) provides many necessary features for mitigating evil maid attacks. The compromised firmware can then be configured to send keystrokes to the attacker remotely. ![]() These vulnerabilities allow an attacker to boot from an external drive and compromise the firmware. Additionally, it does not support secure boot. Its architecture is old, updates and Option ROMs are unsigned, and configuration is unprotected. Legacy BIOS is considered insecure against evil maid attacks. The attacker can then access the victim's data. In either case, when the victim inputs their password on the false device, the device sends the password to the attacker, who is in possession of the original device. If the device has a lock screen, however, the process becomes more difficult as the attacker must acquire the background picture to put on the lock screen of the mimicking device. If the original device has a bootloader password, then the attacker only needs to acquire a device with an identical bootloader password input screen. The attacker simply needs to connect to the hardware device in order to access the information.Īn evil maid attack can also be done by replacing the victim's device with an identical device. Īnother method of attack is through a DMA attack in which an attacker accesses the victim's information through hardware devices that connect directly to the physical address space. In order to successfully complete the attack, the attacker must return to the device once it has been unattended a second time to steal the now-accessible data. Once the password is input, the compromised firmware sends the password to the attacker and removes itself after a reboot. The compromised firmware often provides the victim with a fake password prompt identical to the original. However, if the device is password protected, as with full disk encryption, the firmware of the device needs to be compromised, usually done with an external drive. If the victim's device does not have password protection or authentication, an intruder can turn on the computer and immediately access the victim's information. The attacker can then proceed to tamper with the system. The attack begins when the victim leaves their device unattended. He was instructed to buy new ones before leaving and dispose of them when he returned so that any physical attempts to retrieve data would be ineffective. agencies to leave his devices in the U.S. In 2009, Symantec CTO Mark Bregman was advised by several U.S. government to be more wary of physical attacks. Although the allegations have yet to be confirmed or denied, the incident caused the U.S. He left his computer unattended during a trade talk in Beijing, and he suspected that his device had been compromised. Commerce Secretary Carlos Gutierrez was allegedly targeted by an evil maid attack during a business trip to China. He talked about the WhisperCore Android distribution and its ability to provide disk encryption for Androids. Defreez, a computer security professional, first mentioned the possibility of an evil maid attack on Android smartphones in 2011. ![]() The post detailed a method for compromising the firmware on an unattended computer via an external USB flash drive – and therefore bypassing TrueCrypt disk encryption. In a 2009 blog post, security analyst Joanna Rutkowska coined the term "Evil Maid Attack" due to hotel rooms being a common place where devices are left unattended.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |