rule win_morpheus_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.morpheus."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.morpheus"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 8b44244c ffc0 8944244c ebc4 }
            // n = 4, score = 200
            //   8b44244c             | mov                 dword ptr [esp + 0x1b0], eax
            //   ffc0                 | dec                 eax
            //   8944244c             | lea                 eax, [0x1bb4]
            //   ebc4                 | dec                 eax

        $sequence_1 = { 8b8424dc010000 8b4c242c 488b942428040000 488b5210 488904ca }
            // n = 5, score = 200
            //   8b8424dc010000       | mov                 eax, dword ptr [esp + 0xc8]
            //   8b4c242c             | dec                 eax
            //   488b942428040000     | dec                 eax
            //   488b5210             | dec                 eax
            //   488904ca             | mov                 dword ptr [esp + 0xd0], eax

        $sequence_2 = { 0f845a020000 b808000000 486bc002 488b8c24f0000000 }
            // n = 4, score = 200
            //   0f845a020000         | je                  0x22f
            //   b808000000           | dec                 eax
            //   486bc002             | mov                 eax, dword ptr [esp + 0x30]
            //   488b8c24f0000000     | dec                 eax

        $sequence_3 = { 488b8c2400010000 ff15???????? 488b8c2400010000 ff15???????? e9???????? }
            // n = 5, score = 200
            //   488b8c2400010000     | movzx               eax, word ptr [eax]
            //   ff15????????         |                     
            //   488b8c2400010000     | mov                 dword ptr [esp + 0x120], eax
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_4 = { 4883c002 4889842468010000 83bc241401000000 740c 8b442444 ffc0 89442444 }
            // n = 7, score = 200
            //   4883c002             | test                eax, eax
            //   4889842468010000     | je                  0x1cb7
            //   83bc241401000000     | dec                 eax
            //   740c                 | mov                 eax, dword ptr [esp + 0x78]
            //   8b442444             | movzx               eax, word ptr [eax]
            //   ffc0                 | dec                 eax
            //   89442444             | mov                 eax, dword ptr [esp + 0x70]

        $sequence_5 = { b85f000000 66898424c4000000 b82e000000 66898424c6000000 }
            // n = 4, score = 200
            //   b85f000000           | lea                 eax, [esp + 0x120]
            //   66898424c4000000     | dec                 eax
            //   b82e000000           | mov                 dword ptr [esp + 0x20], eax
            //   66898424c6000000     | inc                 ecx

        $sequence_6 = { ebb1 33c0 488b8c24a8000000 668901 }
            // n = 4, score = 200
            //   ebb1                 | mov                 ecx, dword ptr [esp + 0x58]
            //   33c0                 | dec                 esp
            //   488b8c24a8000000     | lea                 ecx, [esp + 0x7c]
            //   668901               | inc                 esp

        $sequence_7 = { 39442440 731f 8b442440 488b4c2450 0fbe0401 33442444 }
            // n = 6, score = 200
            //   39442440             | dec                 eax
            //   731f                 | mov                 ecx, dword ptr [esp + 0x428]
            //   8b442440             | dec                 eax
            //   488b4c2450           | mov                 edx, dword ptr [esp + 0x428]
            //   0fbe0401             | dec                 eax
            //   33442444             | mov                 edx, dword ptr [edx + 0x10]

        $sequence_8 = { ff15???????? c744242000000000 c744242800000000 eb0a 8b442420 ffc0 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   c744242000000000     | add                 eax, 2
            //   c744242800000000     | dec                 eax
            //   eb0a                 | mov                 dword ptr [esp + 0xd8], eax
            //   8b442420             | jmp                 0x1199
            //   ffc0                 | xor                 eax, eax

        $sequence_9 = { 4c8bc0 ba08000000 488b0d???????? ff15???????? 488b4c2438 48894110 }
            // n = 6, score = 200
            //   4c8bc0               | movzx               eax, byte ptr [esp + 0x58]
            //   ba08000000           | mov                 byte ptr [esp + 0x22], al
            //   488b0d????????       |                     
            //   ff15????????         |                     
            //   488b4c2438           | movzx               eax, byte ptr [esp + 0x22]
            //   48894110             | test                eax, eax

    condition:
        7 of them and filesize < 74752
}