YARA Rule: entropy.yar

Sponsored by Hudson Rock – Use Hudson Rock's free cybercrime intelligence tools to learn how Infostealer infections are leading to ransomware attacks

Valid Rule

/*
Entropy ransomware (Conti-based)
*/

rule Entropy_Ransomnote
{
    meta:
        author = "ransomware.live"
        family = "ransomware.entropy"
        description = "Detects Entropy ransomware ransom note"
        date = "2026-05-04"
        severity = 7
        score = 70

    strings:
        $s1 = "Entropy" ascii nocase
        $s2 = "ENTROPY" ascii
        $s3 = "entropy.onion" ascii nocase
        $s4 = "W8Locker" ascii nocase

    condition:
        any of them
}