/*
Nefilim ransomware
*/

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

    strings:
        $s1 = "NEFILIM-DECRYPT.txt" ascii nocase
        $s2 = "NEFILIM" ascii
        $s3 = "nefilim@" ascii nocase
        $s4 = ".NEFILIM" ascii

    condition:
        any of them
}

rule Nefilim_PE
{
    meta:
        author = "ransomware.live"
        family = "ransomware.nefilim"
        description = "Detects Nefilim ransomware executable"
        date = "2026-05-04"
        severity = 9
        score = 90

    strings:
        $s1 = "NEFILIM" ascii wide
        $s2 = "NEFILIM-DECRYPT" ascii
        $s3 = ".NEFILIM" ascii

    condition:
        uint16(0) == 0x5A4D and 2 of them
}