YARA Rule: helldown.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

/*
Helldown ransomware
*/

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

    strings:
        $s1 = "Helldown" ascii nocase
        $s2 = "HELLDOWN" ascii
        $s3 = "helldown.onion" ascii nocase
        $s4 = ".helldown" ascii

    condition:
        any of them
}