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Netwalker ransomware

(also mailto ransomware)

Netwalker ransomware definition

Netwalker ransomware is a type of malicious software that encrypts a victim's data, rendering it inaccessible, and then demands a ransom in exchange for the decryption key. It primarily targets businesses and organizations, often exploiting vulnerabilities in remote access tools or using phishing emails to gain entry. Once inside the network, Netwalker ransomware can spread quickly, encrypting files on both local and network drives.

See also: cryptolocker ransomware, end-to-end encryption, angler phishing

Netwalker ransomware examples

  • Healthcare sector attacks: Netwalker ransomware has been known to target hospitals and other healthcare facilities, putting lives at risk and disrupting essential services.
  • Ransomware-as-a-service (RaaS): Netwalker ransomware operates on a RaaS model, where affiliates use the ransomware in exchange for a percentage of the ransom payments they collect from victims.

Preventing Netwalker ransomware

  • Keep all software and operating systems up-to-date to patch vulnerabilities.
  • Use strong, unique passwords for all accounts and enable two-factor authentication where possible.
  • Train employees to recognize phishing emails and report suspicious messages.
  • Implement a robust backup strategy to ensure data can be restored if encrypted by ransomware.