Drive Badger: open source platform for covert data exfiltration operations, ranging from small computers to big servers.

contact@drivebadger.com

Drive Badger is able to automatically detect and decrypt Bitlocker-encrypted partitions, but only using recovery keys. It doesn't support other Bitlocker methods: PIN, password, FVEK files, TPM interactions etc., as these methods cannot be automated.

How to provide decryption keys?

See keys-bitlocker-demo repository. It contains a sample bitlocker.keys file.

You can configure multiple such repositories - each such repository should:

  • be cloned to /opt/drivebadger/config/keys-bitlocker-yourchosenname local directory on your Drive Badger persistent partition
  • contain bitlocker.keys file with proper contents (see below)

Local directory doesn't need to contain .git subdirectory, in fact it can be just "floating" directory (created by hand or script, without repository). However if it does, then you can update it automatically using /opt/drivebadger/update.sh (in just 1 step for all repositories).

Do you have more information about these keys?

If you have decryption keys associated (directly or indirectly) with particular drive serial numbers, you can save such keys in keys directory.

If you have any additional useful information about particular keys, allowing you to split them in some way (eg. into cities, buildings, floors, company departments, employee specialties) into smaller groups, you can try:

  • split them into separate repositories
  • configure these repositories across many Drive Badger devices, according to your attack plan

bitlocker.keys file format

bitlocker.keys file can contain:

  • Bitlocker recovery keys, one per line
  • comments starting from # sign (without leading spaces)
  • empty lines

Example bitlocker.keys file:

# my laptop 1
123456-123456-123456-123456-123456-123456-123456-123456

# my laptop 2
987654-321987-987654-321987-987654-321987-987654-321987

How the keys are matched to encrypted partitions

As opposed to other encryption schemes, Bitlocker encrypted partitions are not detected by systemd/udevd and not accessible via UUID. Therefore, they are detected in a special way, after processing all partitions that have assigned UUID:

  • each UUID-less partition is checked against the concatenated list of recovery passwords from all bitlocker.keys files
  • when a matching key is found, it's saved in keys directory - so it can be easily reused

From the founder...

Being in IT security business for almost 25 years, I realized, that breaking protections (or preventing it) is becoming less and less important. We are not living in Outlook Express times anymore...
The key point is the ability to keep the privileges permanent, once obtained. This becomes more and more difficult, as IT systems get more and more complicated - and this is exactly the goal of Drive Badger project: to give non-ITSEC people the ability to keep either the privileges, or the outcome of the successful break-in.