Paying ransom fees to regain access to data in the vague hope that criminals will release files from hostage is a known phenomenon that continues to demand regular column inches. But currently, with ransomware on the rise, no company wants to get into the habit of paying out a ransom fee to access their own services. Ransomware threats reached an all-time high in 2016, increasing by 752% compared to the previous year and resulting in £815 million in losses for businesses, according to a study by Trend Micro and the Zero Day Initiative. This came as the number of ransomware families – including variants known as Bit Crypt, CryptoWall, Cerber and Jigsaw – increased from just 29 to 247 in the same timeframe, while research by CyberEdge Group found that nearly two thirds of organisations fell victim to a ransomware attack during the year.
This begs the question – how can businesses guard against the rising threat of ransomware?
The rise of ransomware
The key factor here is that malware has previously been something only skilled hackers could create, but now the ease of ransomware creation makes the process almost effortless – making it a simple task for, in theory, anyone with a computer to drop the malware and wait for the ransom pay-out. Indeed, a service known as Satan on dark web portal Tor allows anyone to create and configure a variant of malware and choose from a range of techniques, select a ransom note, choose a contact preference and track the amount of money they’ve made.
Trojan malware like Locky, TeslaCrypt and CryptoLocker are the most commonly used variations currently used to attack companies. These often breach security loopholes in web browsers and their plugins or inadvertently opened email attachments then, once inside the company, the ransomware can spread at breakneck speeds and begin to encrypt valuable data. The FBI has recommended that companies implement a solid ransomware backup and recovery strategy for effective protection against data loss caused by CryptoLocker or any other Trojan.
Repelling ransomware
The criticality of the workloads and data within business environments demands a 3-2-1 rule, whereby 3 copies of the company data should be saved on 2 different media and 1 copy should be offsite.
Here are four options for effective data backup:
1. Backup Copy Job to disk
The first option is to transfer the data from one location to another using Backup Copy Job. Here, a file is not just copied, but the individual restore points within the backup are read and written to a second disk destination. Should the primary backup be encrypted or become corrupt, the Backup Copy Job would also fail because the vendor would not be able to interpret the data.
In such a scenario, the only hope is that the second backup repository has been separated from the rest of the IT environment. One could also use a Linux-based backup repository to secure against Windows Trojans.
2. Removable hard disks
Another option is to use a removable storage device as the secondary repository. This is usually done with removable hard drives such as USB disks, which aren’t commonly recommended for security purposes but if stored in a secure location could be a viable option for avoiding ransomware. In addition, when it comes to media rotation it is possible to detect when an old piece of media is re-inserted and automatically ensure that old backup files are deleted and a new backup chain is started.
- Tape
The once-condemned tape option is becoming an increasingly popular option for IT in regards to encryption Trojans. This is because tapes do not enable direct data access, and thus provide protection against ransomware. Just like rotatable media, tapes should be exported to a secure location for optimum protection.
- Storage snapshots and replicated VMs
Organisations can enjoy additional availability and ways to implement the 3-2-1 rule with storage snapshots and replicated VMs. These are semi-offline instances of data that can be resilient against malware propagation.
Never pay a ransom again
Ransomware must be prevented where possible, detected if it gains access to systems and contained to limit damage. But only through a collaborative and integrated approach, which ensures both security policies and SLAs align with business objectives, can organisations have confidence their data is as secure and available as possible. Doing so gives them the best chance of keeping their organisation one step ahead of the cybercriminals, as they look to realise the benefits of digitisation.
