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Terramaster NAS Devices Being Attacked By Deadbolt Ransomware

Deadbolt Ransomware Attacking NAS Drives Again – This time it is Terramaster

It pains me to make this post, but yes, Deadbolt ransomware has once again attacked NAS drives and this time the target is Terramaster devices. Although exact details on the attack vector of this ransomware are yet to be confirmed (though I will be updating this article as more information arrives), it looks like a very similar attack to those that affected Asustor last week, using very similar display methods of highlighting the means of paying the ransom, as well as similar ways that people have been alerted to it on their individual systems. Likely candidates at the time of writing point to this either being based around a UPnP weakness (similar to a previous ransomware exploit that was used) or weak network management (either in the ports used or in 3rd party applications poking holes in your firewall etc in order to facilitate remote access). As mentioned, the details are still rather murky and the first reported hit by users online was around 10 hours ago, so similarities in how people have arranged their network/system services are slowly getting pieced together. If you DO own a Terramaster NAS drive right now, I would make the following recommendations:

IF your Terramaster NAS is COMPLETELY isolated from the internet (and you are 100% certain of this, eg you directly PC-to-NAS interface your system OR you run the NAS on an isolated vLAN in your network behind a bunch of layers), then you can largely ignore the above.

 

UPDATED 02/03 08:00 GMT

Since the deadbolt ransomware’s first targetted attacks yesterday, Terramaster has rolled out a new firmware update (TOS version 4.2.30) and they strongly recommend users who have not yet been affected to upgrade now. The update will be available from the usual system settings, software update menu from within the TOS web browser GUI in the window below:

Also, you can choose to manually download the TOS 4.2.30 update directly on TerraMaster official website->SUPPORT->DOWNLOAD page (see image below) here – https://support.terra-master.com/download/

It is VERY IMPORTANT that users understand the following details before they update their Terramaster NAS to this latest firmware updated version:

Back to the Original Article.

What Do We Know About the Terramaster NAS Deadbolt Ransomware Attack?

The bulk of the details even at this early stage of the terramaster NAS deadbolt ransomware attack bear alot of similarities to those of the Asustor attack last week (Read the article on that plus all the updates and MOST IMPORTANTLY the comments of that article as there is alot of information on how people have responded/adapted to when this hit them). Most users understood that their Terramaster NAS system was in the process of being hit by deadbolt Ransomware in two very clear ways, one arguably worse than the other. The first was that many of the more value series Terramster NAS systems (2/4 Bay systems at the Dual-Core level) had a sharp and very noticeable rise in system fan activity (and HDD LED lights kicking off incessantly) as the encryption command pushed the system very hard indeed. If you were fortunate enough to spot this early, then there is a reasonable chance that the % of files encrypted would be very low. However, a larger proportion of users found their NAS system was mostly/completely encrypted overnight (or whilst they were out of sight/earshot of the NAS) and their first knowledge of the attack was to be greeted by this (now depressingly familiar in 2022) deadbolt login screen:

Important Message for TERRAMASTER
All your affected customers have been targeted using a zero-day vulnerability in your product. We offer you two options to mitigate this (and future) damage:

1) Make a bitcoin payment of 5 BTC to bc1qhkeecsgmzf2965fg57ll3enqyj7y094lxl5nzm:

You will receive all details about this zero-day vulnerability so it can be patched. A detailed report will be sent to support@terra-master.com.

2) Make a bitcoin payment of 15 BTC to bc1qhkeecsgmzf2965fg57ll3enqyj7y094lxl5nzm:

You will receive a universal decryption master key (and instructions) that can be used to unlock all your clients their files. Additionally, we will also send you all details about the zero-day vulnerability to support@terra-master.com.

Upon receipt of payment for either option, all information will be sent to you in a timely fashion.

There is no way to contact us.
These are our only offers.
Thanks for your consideration.

Greetings,
DEADBOLT team.

If you are unsure if you have been hit by the deadbolt ransomware attack (i.e. you can still login fine and the login screen has not changed) but want to do a quick checklist on things to monitor. Here is a brief to-do list:

Currently (01/03/22 930AM GMT) Terramaster has yet to issue a formal statement on this or a firmware update, but the attack is around 12 hours old at most. Still, this is now the 3rd Deadbolt attack to hit NAS brands in the last 6 months (Asustor and QNAP previously) and alongside the earlier attack of a vulnerability in TOS at the start of the year. There are hopes that the current TOS 5.0 update (still in Beta) will feature improvements in it’s network security and how much access installed apps have to the core system administration.

What Does Terramaster Advise to Prevent the Deadbolt Ransomware?

Terramaster has responded to this recent Deadbolt ransomware attack of their NAS systems with the following statement:

Recently, we have received reports of some TNAS devices being attacked by Deadbolt Ransomware. Based on the case analysis, we initially concluded that this was an external attack against TNAS devices. To protect your data from Deadbolt, please take action now!

If your NAS works normally, we suggest you take the following countermeasures:

1. Upgrade your TOS to the latest version;

2. Install good anti-virus software on your computer, TNAS device and router to help you detect and resist malicious threats;

3. Disable port forwarding on your router. After disabling this function, you will not be able to access TNAS through the TNAS device bound to the DDNS external network.

4. Disable the UPnP function on your TNAS. After disabling, your PC, multimedia box, TV and other devices may not be able to access TNAS through UPnP protocol, please use DLNA, NFS, SMB protocol to access TNAS instead.

For more detailed measures, please refer to the following link:

https://www.terra-master.com/global/press/index/view/id/1143/

 

If you find that your NAS has unfortunately been affected by Deadbolt Ransomware, please follow the steps as below:

  1. Remove the LAN network cable from your TNAS device immediately.

  2. Power off your TNAS; x.86 models: short press the power button; ARM models: long-press the power button 3 seconds.

  3. Do not initialize your NAS as this will erase your data. 

  4. Please contact the online support on our official website or email to support@terra-master.com directly.

Additionally, there is a great deal of activity in the last 12 hours on the official support forums on this, with a Terramaster Customer Representative issuing the following response to an initial enquiry on deadbolt ransomware attacks:

Right now, Asustor has yet to issue further information on recovery on this (unless I have updated this article above with further information), but I would recommend following the steps provided by other NAS brands in the wake of a ransomware attack such as this:

Until the attack vector is established, I would recommend going ‘all in’ on updating your security settings. Although a lot of the changes relating to password changes seem unrelated to this, without having a complete throughline on similarities between users, it is best to dot every i and cross every t!

Is There A Solution, Restoration or Recovery Method Currently Available to Deadbolt Affected Terramaster NAS?

As it stands, there is no resolution available from Terramaster NAS if your files have been encrypted by Deadbolt ransomware. other than paying the ransom (which would suck!) many are looking at methods of recovery using linux based mounting of the drives and accessing any snapshots in a BTRFS volume (or using PhotoRec/TeskDisk in the hope of reverting the files), but even then, there is little currently possible to recover affected files. That may not always be the case and I would still recommend keeping the encrypted files (in a 2nd location if you need to format your terramaster for continued use) as recovery methods might become available in weeks/months from now. Terramaster issued an updated press release on this with further instructions on disabling specific services, We suggest you take the following countermeasures:

  1. Upgrade your TOS to the latest version;
  2. Install good anti-virus software on your computer, TNAS device and router to help you detect and resist malicious threats;
  3. Disable port forwarding on your router. After disabling this function, you will not be able to access TNAS through the TNAS device bound to the DDNS external network.
  4. Disable the UPnP function on your TNAS. After disabling, your PC, multimedia box, TV and other devices may not be able to access TNAS through UPnP protocol, please use DLNA, NFS, SMB protocol to access TNAS instead.

  1. Disable RDP, SSH and Telnet when not in use;

Additional Changes Here:

  1. Change the default port of FTP. When you use the FTP protocol to access, please pay attention to bringing the port, such as ftp://192.168.0.1:1990.

  1. Set a high security level password for all users;
  2. Disable the system default admin account, re-create a new admin account, and set an advanced password;
    Note: For versions after TOS 4.2.09, you can set the administrator account without using the default admin username when installing the system. If it was upgraded from a version before TOS 4.2.09, you need to reset the system configuration, then you can customize the user name.

  3. Enable firewall and only allow trusted IP addresses and ports to access your device;
    a. Go to Control Panel > General Settings > Security > Firewall.
    b. Create a firewall rule and choose the operation of allow or deny.
    c. Fill in the IP range you allow or deny access to. If you fill in the network you want to deny access to, please fill in the subnet address correctly, otherwise it may cause your existing devices to be unable to access TNAS.

  1. Avoid using default port numbers 5443 for https and 8181 for http. After changing, please enter IP:Port in the browser address bar, such as 192.168.0.1:8186.
  2. Enable automatic IP block in TOS Control Panel to block IP addresses with too many failed login attempts;

  1. Backing up data is the best way to deal with malicious attacks; always back up data, at least one backup to another device. It is strongly recommended to adopt a 3-2-1 backup strategy.

 

If your Terramaster NAS was NOT affected, I would still recommend disabling remote/internet access., as the act vectors are not clear and there are reports from some users right now that state that they had the latest firmware, they were still hit. Therefore right now there is so much unconfirmed info here to allow remote access (in my opinion) and until further info is made available, I strongly recommend disconnecting your Terramaster NAS from the internet (wire AND via the software settings) and getting your backups in order. I will update this article soon as more information becomes available.

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