rule elf_kobalos_w0 {
    meta:
        description = "Kobalos malware"
        author = "Marc-Etienne M.Léveillé"
        date = "2020-11-02"
        reference = "http://www.welivesecurity.com"
        source = "https://github.com/eset/malware-ioc/"
        license = "BSD 2-Clause"
        version = "1"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/elf.kobalos"
        malpedia_rule_date = "20210202"
        malpedia_hash = ""
        malpedia_version = "20210202"
        malpedia_sharing = "TLP:WHITE"

    strings:
        $encrypted_strings_sizes = {
            05 00 00 00 09 00 00 00  04 00 00 00 06 00 00 00
            08 00 00 00 08 00 00 00  02 00 00 00 02 00 00 00
            01 00 00 00 01 00 00 00  05 00 00 00 07 00 00 00
            05 00 00 00 05 00 00 00  05 00 00 00 0A 00 00 00
        }
        $password_md5_digest = { 3ADD48192654BD558A4A4CED9C255C4C }
        $rsa_512_mod_header = { 10 11 02 00 09 02 00 }
        $strings_rc4_key = { AE0E05090F3AC2B50B1BC6E91D2FE3CE }

    condition:
        any of them
}