rule win_dyre_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 56 68080000f0 33f6 6a18 56 56 }
            // n = 6, score = 900
            //   56                   | push                esi
            //   68080000f0           | push                0xf0000008
            //   33f6                 | xor                 esi, esi
            //   6a18                 | push                0x18
            //   56                   | push                esi
            //   56                   | push                esi

        $sequence_1 = { 894608 8b4608 5f 5b }
            // n = 4, score = 900
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx

        $sequence_2 = { 3de5030000 7405 83c8ff 5d c3 }
            // n = 5, score = 900
            //   3de5030000           | cmp                 eax, 0x3e5
            //   7405                 | je                  7
            //   83c8ff               | or                  eax, 0xffffffff
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_3 = { 85c0 7406 894604 897e08 }
            // n = 4, score = 900
            //   85c0                 | test                eax, eax
            //   7406                 | je                  8
            //   894604               | mov                 dword ptr [esi + 4], eax
            //   897e08               | mov                 dword ptr [esi + 8], edi

        $sequence_4 = { 3b4608 7603 894608 8b4608 }
            // n = 4, score = 900
            //   3b4608               | cmp                 eax, dword ptr [esi + 8]
            //   7603                 | jbe                 5
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   8b4608               | mov                 eax, dword ptr [esi + 8]

        $sequence_5 = { 6a00 8d4610 50 6a01 }
            // n = 4, score = 900
            //   6a00                 | push                0
            //   8d4610               | lea                 eax, [esi + 0x10]
            //   50                   | push                eax
            //   6a01                 | push                1

        $sequence_6 = { 6800000020 56 ff15???????? 50 }
            // n = 4, score = 900
            //   6800000020           | push                0x20000000
            //   56                   | push                esi
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_7 = { e8???????? 85c0 750e 8b45fc 8b1d???????? }
            // n = 5, score = 800
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   750e                 | jne                 0x10
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b1d????????         |                     

        $sequence_8 = { 6a00 6800004000 6800000400 ff15???????? }
            // n = 4, score = 700
            //   6a00                 | je                  8
            //   6800004000           | mov                 dword ptr [esi + 4], eax
            //   6800000400           | mov                 dword ptr [esi + 8], edi
            //   ff15????????         |                     

        $sequence_9 = { 44016f10 44016714 01771c 4c8d9c2420010000 498b5b30 498b6b38 498b7340 }
            // n = 7, score = 500
            //   44016f10             | add                 ecx, dword ptr [ebx]
            //   44016714             | shr                 ecx, 0xa
            //   01771c               | inc                 ecx
            //   4c8d9c2420010000     | rol                 ebx, 0xf
            //   498b5b30             | rol                 eax, 0xd
            //   498b6b38             | dec                 eax
            //   498b7340             | mov                 dword ptr [eax - 0x28], ebx

        $sequence_10 = { 488958d8 8958e0 488958e8 488958a8 }
            // n = 4, score = 500
            //   488958d8             | dec                 eax
            //   8958e0               | mov                 dword ptr [eax - 0x18], ebx
            //   488958e8             | dec                 eax
            //   488958a8             | mov                 dword ptr [eax - 0x58], ebx

        $sequence_11 = { 44030b c1e90a 41c1c30f c1c00d 44894b40 4433d8 418bc0 }
            // n = 7, score = 500
            //   44030b               | mov                 eax, 0x400
            //   c1e90a               | mov                 eax, edi
            //   41c1c30f             | mov                 edx, ebx
            //   c1c00d               | dec                 eax
            //   44894b40             | mov                 dword ptr [eax - 0x18], ebx
            //   4433d8               | dec                 eax
            //   418bc0               | mov                 dword ptr [eax - 0x58], ebx

        $sequence_12 = { 488958e8 488958a8 ff15???????? 85c0 7504 33c0 eb5e }
            // n = 7, score = 500
            //   488958e8             | dec                 eax
            //   488958a8             | mov                 dword ptr [esp + 0x10], ebp
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   7504                 | mov                 dword ptr [esp + 0x18], esi
            //   33c0                 | dec                 eax
            //   eb5e                 | mov                 dword ptr [esp + 0x20], edi

        $sequence_13 = { 488bd5 4c89642420 ff15???????? 85c0 7426 }
            // n = 5, score = 500
            //   488bd5               | mov                 ebp, ecx
            //   4c89642420           | dec                 eax
            //   ff15????????         |                     
            //   85c0                 | mov                 dword ptr [eax - 0x18], ebx
            //   7426                 | dec                 eax

        $sequence_14 = { 48895c2408 48896c2410 4889742418 48897c2420 4154 4883ec20 418be9 }
            // n = 7, score = 500
            //   48895c2408           | dec                 eax
            //   48896c2410           | add                 ebx, 0x10
            //   4889742418           | dec                 eax
            //   48897c2420           | dec                 esi
            //   4154                 | jne                 0xffffff11
            //   4883ec20             | dec                 eax
            //   418be9               | mov                 dword ptr [esp + 8], ebx

        $sequence_15 = { 0f1f00 85c0 74e5 41b800040000 }
            // n = 4, score = 500
            //   0f1f00               | mov                 dword ptr [eax - 0x58], ebx
            //   85c0                 | test                eax, eax
            //   74e5                 | jne                 0xc
            //   41b800040000         | xor                 eax, eax

        $sequence_16 = { 44034330 4503c2 4489434c 4883c310 48ffce 0f8504ffffff }
            // n = 6, score = 500
            //   44034330             | inc                 esp
            //   4503c2               | add                 eax, dword ptr [ebx + 0x30]
            //   4489434c             | inc                 ebp
            //   4883c310             | add                 eax, edx
            //   48ffce               | inc                 esp
            //   0f8504ffffff         | mov                 dword ptr [ebx + 0x4c], eax

    condition:
        7 of them and filesize < 590848
}