/*
Ragnarok ransomware
*/

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

    strings:
        $s1 = "!!!_IMPORTANT_FILES_ARE_CHANGED.txt" ascii nocase
        $s2 = "How_To_Decrypt_My_Files.txt" ascii nocase
        $s3 = "RAGNAROK" ascii nocase
        $s4 = ".RAGNAROK" ascii

    condition:
        any of them
}