rule win_dyre_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.dyre."
        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.dyre"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 59 59 85c0 7406 894604 }
            // n = 5, score = 600
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7406                 | je                  8
            //   894604               | mov                 dword ptr [esi + 4], eax

        $sequence_1 = { 74ea 5f 5e c9 }
            // n = 4, score = 600
            //   74ea                 | je                  0xffffffec
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   c9                   | leave               

        $sequence_2 = { 7609 ff460c 8b460c 48 eb03 83c8ff 5f }
            // n = 7, score = 600
            //   7609                 | jbe                 0xb
            //   ff460c               | inc                 dword ptr [esi + 0xc]
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   48                   | dec                 eax
            //   eb03                 | jmp                 5
            //   83c8ff               | or                  eax, 0xffffffff
            //   5f                   | pop                 edi

        $sequence_3 = { 751c ff7508 ff7514 ff7510 68???????? ff750c }
            // n = 6, score = 600
            //   751c                 | jne                 0x1e
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   68????????           |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_4 = { 50 8b4508 8b30 8d7dfc }
            // n = 4, score = 600
            //   50                   | push                eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   8d7dfc               | lea                 edi, [ebp - 4]

        $sequence_5 = { 32db 57 8bf9 85f6 7514 6a10 e8???????? }
            // n = 7, score = 600
            //   32db                 | xor                 bl, bl
            //   57                   | push                edi
            //   8bf9                 | mov                 edi, ecx
            //   85f6                 | test                esi, esi
            //   7514                 | jne                 0x16
            //   6a10                 | push                0x10
            //   e8????????           |                     

        $sequence_6 = { 50 ff15???????? 0fb7c0 8945fc }
            // n = 4, score = 600
            //   50                   | push                eax
            //   ff15????????         |                     
            //   0fb7c0               | movzx               eax, ax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_7 = { 50 ff75f8 ff75f4 ff36 }
            // n = 4, score = 600
            //   50                   | push                eax
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff36                 | push                dword ptr [esi]

        $sequence_8 = { 488bcb e8???????? 85c0 750d 33c0 488b5c2430 }
            // n = 6, score = 500
            //   488bcb               | dec                 eax
            //   e8????????           |                     
            //   85c0                 | mov                 ecx, ebx
            //   750d                 | test                eax, eax
            //   33c0                 | jne                 0xf
            //   488b5c2430           | xor                 eax, eax

        $sequence_9 = { 410fb649fe c1e208 440bc2 41c1e008 410bc8 49ffca 43894c0bd3 }
            // n = 7, score = 500
            //   410fb649fe           | dec                 eax
            //   c1e208               | mov                 ecx, edi
            //   440bc2               | cmp                 word ptr [edi], ax
            //   41c1e008             | jne                 0x32
            //   410bc8               | mov                 eax, dword ptr [esi + 4]
            //   49ffca               | cmp                 dword ptr [edi + 4], eax
            //   43894c0bd3           | inc                 esp

        $sequence_10 = { 034310 8d740627 413bfc 7cdf }
            // n = 4, score = 500
            //   034310               | inc                 ecx
            //   8d740627             | movzx               ecx, byte ptr [ecx - 1]
            //   413bfc               | inc                 ecx
            //   7cdf                 | movzx               edx, byte ptr [ecx]

        $sequence_11 = { 4433c0 418bc4 4123c5 33c8 8bc3 4403c1 }
            // n = 6, score = 500
            //   4433c0               | mov                 ecx, ebx
            //   418bc4               | dec                 esp
            //   4123c5               | lea                 ebx, [esi + 1]
            //   33c8                 | inc                 ecx
            //   8bc3                 | mov                 eax, 0xfffffff7
            //   4403c1               | nop                 word ptr [eax + eax]

        $sequence_12 = { 488bcb e8???????? 4c8d5e01 41b8f7ffffff 6666660f1f840000000000 488bcf 418d4008 }
            // n = 7, score = 500
            //   488bcb               | test                eax, eax
            //   e8????????           |                     
            //   4c8d5e01             | jne                 0x11
            //   41b8f7ffffff         | xor                 eax, eax
            //   6666660f1f840000000000     | dec    eax
            //   488bcf               | mov                 ecx, ebx
            //   418d4008             | dec                 esp

        $sequence_13 = { 663907 7530 8b4604 394704 7528 8b4608 394708 }
            // n = 7, score = 500
            //   663907               | cmp                 word ptr [edi], ax
            //   7530                 | jne                 0x32
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   394704               | cmp                 dword ptr [edi + 4], eax
            //   7528                 | jne                 0x2a
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   394708               | cmp                 dword ptr [edi + 8], eax

        $sequence_14 = { 014120 41c644082880 ff4124 8b4124 }
            // n = 4, score = 500
            //   014120               | inc                 ebp
            //   41c644082880         | movzx               eax, byte ptr [ecx + 1]
            //   ff4124               | shl                 ecx, 8
            //   8b4124               | inc                 ecx

        $sequence_15 = { 410fb649ff 410fb611 450fb64101 c1e108 }
            // n = 4, score = 500
            //   410fb649ff           | xor                 eax, eax
            //   410fb611             | inc                 ecx
            //   450fb64101           | mov                 eax, esp
            //   c1e108               | inc                 ecx

    condition:
        7 of them and filesize < 590848
}