CryptoWall 4

First seen

2015-11-01 00:00:00

Malware type

ransomware

Family

Malware family

Profile updated

2026-07-07 15:47:53

Targeted industries: education-and-nonprofits energy-and-utilities government-and-public-sector healthcare-and-pharmaceutical manufacturing retail-and-hospitality technology-and-telecommunications

Context

CryptoWall 4 is a form of ransomware that encrypts victims' files and demands payment for the decryption key. Known for its improvements over previous versions, it particularly increased focus on avoiding detection and evasion.