On the BadgerDAO Discord, many users complained that when their wallets interacted with BadgerDAO they were hit with requests for additional permissions and then transferred tokens to wallets controlled by the hackers. Unlike many other hacks of DeFi protocols, this one doesn’t appear to be an attack on the protocol itself, but rather the web interface connecting the protocol to the users’ wallets to the protocol. One unlucky user lost 900 bitcoin.īadgerDAO’s mission, as it describes it, is to “bring Bitcoin to DeFi” by creating various wrapped bitcoin products. Our investigation is ongoing and we will release further information as soon as possible.- ₿adgerDAO ? December 2, 2021īadgerDAO initially reported that $10 million had been pilfered, though reports from blockchain security and analytics company PeckShield puts that number closer to $115 million, over 2,063 bitcoins. In the advisory, Microsoft has shared mitigations that restrict the permissions on the C:\Windows\system32\config folder.Badger has received reports of unauthorized withdrawals of user funds.Īs Badger engineers investigate this, all smart contracts have been paused to prevent further withdrawals. Security researchers are also =referring to this vulnerability as 'SeriousSAM' or 'HiveNightmare.' "We are investigating and will take appropriate action as needed to help keep customers protected," Microsoft told BleepingComputer. In a security advisory released today, Microsoft has confirmed the vulnerability and is now tracking it as CVE-2021-36934. Thankfully, Microsoft has shared a temporary fix for the vulnerability that is described in the next section, Microsoft confirms vulnerability If the output displays the following permission, your Windows installation is affected by the vulnerability. To check if your Windows 10 or Windows 11 installation is affected, you can open a command prompt and enter the following command: icacls c:\windows\system32\config\sam installation of Windows but did not fix it when upgrading to new versions. Therefore, it is not clear if Microsoft fixed the permission issue when performing a clean. Strangely, Dormann stated that when installing a fresh version of Windows 10 20H2 from June, the loose permissions were not present. However, Will Dormann, a vulnerability analyst for CERT/CC, and SANS author Jeff McJunkin, said Microsoft introduced the permission changes in Windows 10 1809. It is unclear why Microsoft changed the permissions on the Registry to allow regular users to read the files. In addition to stealing NTLM hashes and elevating privileges, Delpy told BleepingComputer that this low privileged access could allow for further attacks, such as Silver Ticket attacks. These low permissions were confirmed by BleepingComputer on a fully patched Windows 10 20H2 device, as shown below. Yesterday, security researcher Jonas Lykkegaard told BleepingComputer he discovered that the Windows 10 and Windows 11 Registry files associated with the Security Account Manager (SAM), and all other Registry databases, are accessible to the 'Users' group that has low privileges on a device. This is especially true for the Security Account Manager (SAM) file as it contains the hashed passwords for all users on a system, which threat actors can use to assume their identity. The database files associated with the Windows Registry are stored under the C:\Windows\system32\config folder and are broken up into different files such as SYSTEM, SECURITY, SAM, DEFAULT, and SOFTWARE.Īs these files contain sensitive information about all user accounts on a device and security tokens used by Windows features, they should be restricted from being viewed by regular users with no elevated privileges. The Windows Registry acts as the configuration repository for the Windows operating system and contains hashed passwords, user customizations, configuration options for applications, system decryption keys, and more. Windows 10 and Windows 11 are vulnerable to a local elevation of privilege vulnerability after discovering that users with low privileges can access sensitive Registry database files.
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