Ransomware Backup: How To Get Your Data Back
Ransomware attacks have led to many companies losing sensitive or critical data. While preventive measures are the best solution for ransomware, once an attack has already occurred, the best chance to recover the data is to maintain regular data backups. It is crucial to protect your data. You can also take steps to ensure that backups are not encrypted by ransomware.
What is Ransomware Attack?
Ransomware is malware that blocks users from accessing their files. Ransomware is a type of malware that infects computers by searching for files that are valuable and then encrypting them. Files are encrypted with asymmetric key encryption. An attacker holds the key to decrypt them.
Ransomware displays ransomware to its victims. It usually replaces their desktop backgrounds or places a text file with instructions inside the files it has attacked. Ransomware demands payment in cryptocurrency. This will keep the attack anonymous.
WannaCry ransomware warning
The ransom notice usually specifies a deadline by which the victim’s files must be destroyed. Many times, attackers refuse to release files even after victims have paid the ransom.
Ransomware can be classified as WannaCry (Cerber, Cryptolocker, and NotPetya), Ryuk, Ryuk, and Cerber.
Who is Ransomware’s Target?
Ransomware can be used to target anyone: home users, small businesses, large companies, government agencies or public officials, celebrities, politicians, etc.
- Academic organizations–these organizations are a prime target for ransomware and other types of cyberattacks. These organizations have smaller IT and security teams than similar-sized businesses, budget constraints, and high volumes of sensitive data, such as intellectual property and financial data of students, staff, and faculty.
- Healthcare–hospitals and medical devices often use outdated computing devices and software, which may not be patched or suitably updated, making them relatively easy to breach. Cybercriminals are well aware that hospital data can be difficult to access and could pose a threat to patients’ lives. Ransomware is used to attack hospitals, assuming that staff at the hospital will immediately restore the data.
- HR departments–human resources systems have access to personnel and financial records that make them attractive targets for ransomware attacks. Hackers are often able to hack into HR systems pretending they are job applicants. Human resources departments are often tricked into opening an email job application and then executing a malware-infected attachment.
- Government agencies–attackers target governments for obvious reasons, due to their prominence and the sensitive personal data they hold. They believe government agencies will pay the ransom quickly because they can’t afford to lose data of political or public significance.
- Mobile Devices-mobile devices can contain sensitive personal data such as photos and videos, login credentials to online services, and financial data. Access to mobile payments is also possible. Attackers prefer to block access to mobile devices and demand ransom to allow access. Mobile devices are frequently automatically backed up to the cloud so they can be used to request access.
Ransomware: How to Protect Backups
Data backup is the best way to protect yourself against Ransomware. You can recover your data quickly and safely if you have a backup that isn’t affected by ransomware.
These are the best ways to protect your backups from ransomware
- Maintain an offline backup–keep a secondary offline backup copy. Ransomware can infect any system that has internet access. Although your end-users won’t be backup administrators, there are ways that backups could become infected. This will mean that there is no way to restore data as both the backup and main copy will be encrypted. This risk can be mitigated by having an offline backup. It is possible to make backups using traditional tapes that are difficult for Ransomware to access.
- Use immutable storage–also known as WORM (Write-Once-Read-Many), immutable object storage can store data in a bucket and lock it to prevent further modification. Many disk-based backup systems protect data at the block level and use modified block monitoring to safeguard files when they are modified. However, ransomware can change many storage blocks so your back system might end up backing up encrypted files. Immutable storage ensures backups remain unchanged.
- Endpoint protection using backup servers Modern endpoint protection platforms can detect ransomware processes before they infect a system. They can quickly lock down infected systems, and isolate them from network traffic to stop ransomware from spreading. This is important for all organizational endpoints, but it is particularly useful on the backup server.
- Increase your backup frequency – This determines your recovery objective (RPO). The ransomware attack can cause data loss at a certain frequency. Consider the potential loss of all data from the backups, regardless of whether you back up every day or every few hours. Consider backing up mission-critical data at least once per hour.
Use the 3-2-1 Backup Strategy for Ransomware Prevention
The 3-2-1 rule can be used as a best practice for backup and recovery. It can also help to mitigate ransomware threats. Although no backup strategy is perfect, the 3-2-1 rule is the best way to avoid data loss.
This is how 3-2-1 backup works.
- Keep at least three copies of your information, one main copy and two back-ups.
- You can use 2 different media formats, such as SSD drive or cloud storage.
- Keep one copy offsite – The best option is to save data to a tape and then deposit it in a secure place. Another option is to automatically take a snapshot of data and store it in a disaster recovery area.
Cloudian offers Ransomware-Resilient Backup
Cloudian(r), HyperStore(r), is a large-capacity object storage device. It can store up to 1.5 Petabytes within a 4U Chassis device. This allows you to store as many as 18 Petabytes inside a single rack. HyperStore has fully redundant cooling and power, as well as performance features such as 1.92TB SSD, drives that store metadata and 10Gb Ethernet ports to speed up data transfer.
You can deploy clouding storage devices:
- Used as a backup target in data protection applications such as Rubrik, Commvault, and VERITAS.
- Enterprise sync and share solution that allows client systems to synchronize their data and keep a copy on a central repository.
- Client systems use to save important files.
Cloudian offers two methods to protect your data against Ransomware:
- Write once, read many (WORM). Cloudian guarantees that data cannot be modified or deleted after it has been written. Ransomware is ineffective because the data can’t be altered. Cloudian storage devices can provide WORM as a system-level function. Three ways to deploy WORM-equipped storage:
- Data Versioning – Cloudian creates new copies of data for changes, but retains the original copy for a specific period. A copy of an unencrypted file can still be found if malware encrypts it.
Learn how to lower your storage total cost of ownership with our TCO calculator.