Can Malware/Virus Lock Set a Firmware Password

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iMac Intel 27インチ Retina 5Kディスプレイ (Mid 2017)

モデル番号A1419 / EMC 3070 / Mid 2017 / 3.4, 3.5もしくは3.8 GHz Core i5もしくは4.2 GHz Core i7 Kaby Lakeプロセッサ (ID iMac18,3) / Retina 5Kディスプレイ。システムは類似しているため、修理ガイドについては旧モデルのiMac Intel 27インチ Retina 5Kディスプレイ (Late 2014 & 2015) を参照してください。

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Andy @andy37429

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投稿日: 2019年7月22日

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Can Malware/Virus Lock Set a Firmware Password

Hi,

I think I already know the answer to this questions, however I’ve been given a 2017 iMac with a Firmware Password set won't boot up at all (just showing the Firmware Password Lock). The previous owner is convinced that they have been “Hacked” and the Malware has Set the Password. As far as I’m aware, you can’t set the Firmware Password from within the OS. I’d could see a drive Encryption happening but not a Firmware Utility Password.

However the Mac won’t boot up, so it’s starting to puzzle me. As Firmware Passwords wouldn’t lock the Boot Drive, would they?

Any help would be greatly appreciated. I’m thinking of just swapping the EFI chip, would this work?

Many thanks

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The previous owner was not the real owner! The hardware password is not settable remotely. It must be keyed in via the keyboard and can't be altered via a trojan or malware.

Dan さんによる2019年7月22日

Andy, thanks for sharing your thoughts.

William さんによる2020年3月9日

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The previous owner was not the real owner! The hardware password is not settable remotely. It must be keyed in via the keyboard and can't be altered via a trojan or malware. — Dan

P Schmied @pssst3 評価: 110 3 · Answer 1 · 2019-07-22T08:48:47-07:00

P Schmied @pssst3

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Firmware isn’t normally programmed through the OS of the device that runs it, but before it loads. I doubt that a virus did this. But anything like a password set by the user that can be programmed through a device’s hardware before the user’s OS loads can become damaged. It could be a simple as one bit of data stored data being bad because of a failed cell or a static discharge.

There must be a way to physically reinitialize its BIOS to the factory settings or remove power from the chip that stores the password. The danger of doing this is that if the drive is encrypted, you may lose access to the encrypted contents of the drive.

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iMac Intel 27インチ Retina 5Kディスプレイ (Mid 2017)

Can Malware/Virus Lock Set a Firmware Password

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