rule win_polyglotduke_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.polyglotduke."
        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.polyglotduke"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 4157 4883ec20 488bea 488bd9 4885d2 0f84f2000000 b901000000 }
            // n = 7, score = 100
            //   4157                 | mov                 ecx, dword ptr [esp + 0x58]
            //   4883ec20             | dec                 eax
            //   488bea               | lea                 eax, [esp + 0x48]
            //   488bd9               | inc                 ebp
            //   4885d2               | xor                 ecx, ecx
            //   0f84f2000000         | dec                 eax
            //   b901000000           | mov                 dword ptr [esp + 0x28], eax

        $sequence_1 = { b9e9fd0000 44897c2428 4c897c2420 ff15???????? 4863d8 85c0 7505 }
            // n = 7, score = 100
            //   b9e9fd0000           | dec                 eax
            //   44897c2428           | lea                 ecx, [0xe3c6]
            //   4c897c2420           | dec                 eax
            //   ff15????????         |                     
            //   4863d8               | mov                 dword ptr [ebp], eax
            //   85c0                 | dec                 eax
            //   7505                 | lea                 ecx, [0xe3d2]

        $sequence_2 = { 448b442440 488d15a0fc0000 488d4c2450 ff15???????? 8d550b 488d0ddff80000 e8???????? }
            // n = 7, score = 100
            //   448b442440           | mov                 dword ptr [eax + 0x10], ebx
            //   488d15a0fc0000       | inc                 sp
            //   488d4c2450           | mov                 dword ptr [eax + 0x20], ecx
            //   ff15????????         |                     
            //   8d550b               | push                ebp
            //   488d0ddff80000       | push                esi
            //   e8????????           |                     

        $sequence_3 = { e8???????? ebac 488d4c2450 ff15???????? 8d440002 4863c8 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   ebac                 | and                 dword ptr [esp + 0x20], 0
            //   488d4c2450           | dec                 esp
            //   ff15????????         |                     
            //   8d440002             | lea                 ecx, [esp + 0x50]
            //   4863c8               | test                eax, eax

        $sequence_4 = { 8944242c ff15???????? 488d0d8e040100 e8???????? 488bc8 4c8bf0 }
            // n = 6, score = 100
            //   8944242c             | inc                 eax
            //   ff15????????         |                     
            //   488d0d8e040100       | test                bh, bh
            //   e8????????           |                     
            //   488bc8               | jne                 0x5ee
            //   4c8bf0               | inc                 eax

        $sequence_5 = { 32c0 e9???????? 488d158af10000 e8???????? be01000000 }
            // n = 5, score = 100
            //   32c0                 | dec                 eax
            //   e9????????           |                     
            //   488d158af10000       | mov                 ebx, eax
            //   e8????????           |                     
            //   be01000000           | dec                 esp

        $sequence_6 = { e8???????? 33c9 ff15???????? 488d0ddb8f0000 ff15???????? 833d????????00 750a }
            // n = 7, score = 100
            //   e8????????           |                     
            //   33c9                 | dec                 ecx
            //   ff15????????         |                     
            //   488d0ddb8f0000       | mov                 esi, dword ptr [ebx + 0x20]
            //   ff15????????         |                     
            //   833d????????00       |                     
            //   750a                 | dec                 ecx

        $sequence_7 = { 4103d0 c1fa06 8bc2 c1e81f 03d0 6bd247 442bc2 }
            // n = 7, score = 100
            //   4103d0               | dec                 eax
            //   c1fa06               | mov                 edx, eax
            //   8bc2                 | dec                 eax
            //   c1e81f               | mov                 edi, eax
            //   03d0                 | dec                 eax
            //   6bd247               | mov                 ecx, ebx
            //   442bc2               | dec                 eax

        $sequence_8 = { 488d9550020000 458bc5 498bcc ff15???????? 85c0 7476 c644244001 }
            // n = 7, score = 100
            //   488d9550020000       | test                edi, edi
            //   458bc5               | je                  0x656
            //   498bcc               | inc                 esp
            //   ff15????????         |                     
            //   85c0                 | movzx               eax, word ptr [esp + 0x98]
            //   7476                 | inc                 ecx
            //   c644244001           | lea                 ecx, [eax + edx]

        $sequence_9 = { e8???????? 85db 7902 f7db 4863cb 48b88fe3388ee3388ee3 48f7e1 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85db                 | dec                 ebp
            //   7902                 | cmp                 ecx, edx
            //   f7db                 | jl                  0x11f
            //   4863cb               | movzx               eax, al
            //   48b88fe3388ee3388ee3     | or    ax, dx
            //   48f7e1               | inc                 bx

    condition:
        7 of them and filesize < 222784
}