Newest Ransomware Trend: Attackers Move Faster with Partial Encryption
Check Point Software – News Desk
Partial encryption, also referred to as intermittent encryption or targeted encryption, is a technique used by certain ransomware groups, such as BlackCat mentioned in the provided text.
Unlike full encryption, where all files are encrypted and rendered inaccessible, partial encryption selectively targets specific files or systems for encryption.
Here are some key details about partial encryption in ransomware attacks:
1.
Selective targeting: Ransomware groups employing partial encryption techniques have the ability to selectively target specific files or systems within an organization’s network.
This allows them to focus on critical or valuable data that is more likely to incentivize the victim to pay the ransom.
2.
Customizable byte-skipping patterns: BlackCat, mentioned as one of the ransomware groups, is known to use intermittent encryption with customizable byte-skipping patterns.
Byte-skipping patterns involve the insertion of non-encrypted bytes within encrypted data.
This can make it more challenging for security tools to detect and analyze the encryption patterns, potentially slowing down the identification and recovery processes for the victim.
3.
Purpose and impact: The purpose behind partial encryption is to enforce the ransom payment by selectively encrypting specific files or systems that could cause significant disruptions or financial losses if inaccessible.
By leaving certain parts of the network operational, the attackers aim to demonstrate their control over the victim’s data and encourage payment.
4.
Extortion and negotiation: Partial encryption adds an additional layer of complexity to the negotiation process between ransomware attackers and victims.
The victims may attempt to negotiate a lower ransom payment by arguing that not all data has been encrypted, potentially leading to a partial decryption arrangement if successful.
However, there is no guarantee that attackers will follow through with their promises even if a ransom is paid.
It’s important to note that partial encryption is just one of the techniques employed by ransomware groups, and tactics can vary significantly among different groups.
Organizations should focus on preventative measures, including regular data backups, robust cybersecurity practices, and employee education, to minimize the risk of falling victim to ransomware attacks, regardless of the encryption methods involved.
Link: https://blog.checkpoint.com/security/newest-ransomware-trend-attackers-move-faster-with-partial-encryption/