rule win_polyglotduke_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 4c8be2 488d8d30020000 ba04010000 ff15???????? 41be23010000 85c0 7474 }
            // n = 7, score = 100
            //   4c8be2               | dec                 eax
            //   488d8d30020000       | mov                 ecx, esi
            //   ba04010000           | dec                 esp
            //   ff15????????         |                     
            //   41be23010000         | lea                 ecx, dword ptr [esp + 0x30]
            //   85c0                 | dec                 esp
            //   7474                 | lea                 eax, dword ptr [0xee9b]

        $sequence_1 = { ff15???????? 488bcb 48894658 e8???????? 488bcf e8???????? 488d0dd6590100 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   488bcb               | dec                 eax
            //   48894658             | add                 esp, 0x20
            //   e8????????           |                     
            //   488bcf               | pop                 ebx
            //   e8????????           |                     
            //   488d0dd6590100       | ret                 

        $sequence_2 = { 48894650 e8???????? 488bcf e8???????? 488d0d135a0100 ba11000000 e8???????? }
            // n = 7, score = 100
            //   48894650             | dec                 eax
            //   e8????????           |                     
            //   488bcf               | mov                 ecx, eax
            //   e8????????           |                     
            //   488d0d135a0100       | dec                 eax
            //   ba11000000           | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_3 = { 488bf0 488b4dc8 ff15???????? 488bc6 488b4df0 4833cc e8???????? }
            // n = 7, score = 100
            //   488bf0               | mov                 eax, ebx
            //   488b4dc8             | dec                 eax
            //   ff15????????         |                     
            //   488bc6               | mov                 dword ptr [esp + 0x50], esi
            //   488b4df0             | dec                 eax
            //   4833cc               | mov                 dword ptr [esp + 0x58], eax
            //   e8????????           |                     

        $sequence_4 = { c7442444b8020000 ff15???????? 488d8c24e0000000 ff15???????? 488d8c24e0000000 8d1400 e8???????? }
            // n = 7, score = 100
            //   c7442444b8020000     | dec                 eax
            //   ff15????????         |                     
            //   488d8c24e0000000     | lea                 ecx, dword ptr [ebp - 0x50]
            //   ff15????????         |                     
            //   488d8c24e0000000     | mov                 edx, 0x17
            //   8d1400               | mov                 dword ptr [ebp - 0x50], 0xfa02d66d
            //   e8????????           |                     

        $sequence_5 = { 894710 83f8ff 7518 b956310000 ff15???????? }
            // n = 5, score = 100
            //   894710               | sub                 esp, 0x28
            //   83f8ff               | dec                 esp
            //   7518                 | mov                 eax, ecx
            //   b956310000           | dec                 esp
            //   ff15????????         |                     

        $sequence_6 = { 750f 49ffc0 41ffc1 4b8d0402 493bc3 7ce4 443bcd }
            // n = 7, score = 100
            //   750f                 | inc                 ebx
            //   49ffc0               | jle                 0xd3f
            //   41ffc1               | dec                 ebp
            //   4b8d0402             | mov                 edx, esp
            //   493bc3               | dec                 ebp
            //   7ce4                 | mov                 eax, esp
            //   443bcd               | dec                 ecx

        $sequence_7 = { 488b05???????? 4833c4 488945f0 488b4208 c745d401680000 c745d008020000 c745d810000000 }
            // n = 7, score = 100
            //   488b05????????       |                     
            //   4833c4               | dec                 eax
            //   488945f0             | mov                 ebx, eax
            //   488b4208             | dec                 eax
            //   c745d401680000       | mov                 ecx, ebx
            //   c745d008020000       | dec                 eax
            //   c745d810000000       | mov                 ecx, ebx

        $sequence_8 = { 8b7d97 8d1c3f 4c8be0 8bcb }
            // n = 4, score = 100
            //   8b7d97               | test                ecx, ecx
            //   8d1c3f               | je                  0x1157
            //   4c8be0               | dec                 eax
            //   8bcb                 | lea                 ebp, dword ptr [0x9e5f]

        $sequence_9 = { 664189044e 498bce e8???????? 4533ff 498bce 418bdf ff15???????? }
            // n = 7, score = 100
            //   664189044e           | rep stosd           dword ptr es:[edi], eax
            //   498bce               | dec                 eax
            //   e8????????           |                     
            //   4533ff               | lea                 edi, dword ptr [0xc056]
            //   498bce               | dec                 eax
            //   418bdf               | sub                 edi, ebp
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 222784
}