rule win_byeby_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.byeby"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { e8???????? 6a03 68???????? 8d0c4574a40110 8bc1 2d???????? }
            // n = 6, score = 100
            //   e8????????           |                     
            //   6a03                 | push                3
            //   68????????           |                     
            //   8d0c4574a40110       | lea                 ecx, [eax*2 + 0x1001a474]
            //   8bc1                 | mov                 eax, ecx
            //   2d????????           |                     

        $sequence_1 = { 8bf8 8bf0 c1ff05 83e61f c1e606 8b0cbd18ab0110 }
            // n = 6, score = 100
            //   8bf8                 | mov                 edi, eax
            //   8bf0                 | mov                 esi, eax
            //   c1ff05               | sar                 edi, 5
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   8b0cbd18ab0110       | mov                 ecx, dword ptr [edi*4 + 0x1001ab18]

        $sequence_2 = { f30f7f8578ffffff 83c40c 66c745e80a00 660f6f05???????? f30f7f4588 660f6f05???????? f30f7f4598 }
            // n = 7, score = 100
            //   f30f7f8578ffffff     | movdqu              xmmword ptr [ebp - 0x88], xmm0
            //   83c40c               | add                 esp, 0xc
            //   66c745e80a00         | mov                 word ptr [ebp - 0x18], 0xa
            //   660f6f05????????     |                     
            //   f30f7f4588           | movdqu              xmmword ptr [ebp - 0x78], xmm0
            //   660f6f05????????     |                     
            //   f30f7f4598           | movdqu              xmmword ptr [ebp - 0x68], xmm0

        $sequence_3 = { b020 2ac3 00841cc4010000 8d8424c4010000 }
            // n = 4, score = 100
            //   b020                 | mov                 al, 0x20
            //   2ac3                 | sub                 al, bl
            //   00841cc4010000       | add                 byte ptr [esp + ebx + 0x1c4], al
            //   8d8424c4010000       | lea                 eax, [esp + 0x1c4]

        $sequence_4 = { 33c4 898424e00a0000 53 56 57 }
            // n = 5, score = 100
            //   33c4                 | xor                 eax, esp
            //   898424e00a0000       | mov                 dword ptr [esp + 0xae0], eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_5 = { c744241802000000 c744241c07000000 c744242000000000 c744242400000000 c744242801000000 c744242cb80b0000 ffd6 }
            // n = 7, score = 100
            //   c744241802000000     | mov                 dword ptr [esp + 0x18], 2
            //   c744241c07000000     | mov                 dword ptr [esp + 0x1c], 7
            //   c744242000000000     | mov                 dword ptr [esp + 0x20], 0
            //   c744242400000000     | mov                 dword ptr [esp + 0x24], 0
            //   c744242801000000     | mov                 dword ptr [esp + 0x28], 1
            //   c744242cb80b0000     | mov                 dword ptr [esp + 0x2c], 0xbb8
            //   ffd6                 | call                esi

        $sequence_6 = { 6a08 8d8424b8000000 50 8d4c2434 }
            // n = 4, score = 100
            //   6a08                 | push                8
            //   8d8424b8000000       | lea                 eax, [esp + 0xb8]
            //   50                   | push                eax
            //   8d4c2434             | lea                 ecx, [esp + 0x34]

        $sequence_7 = { 8bfe 83e71f c1e706 8b049d18ab0110 0fbe443804 83e001 750a }
            // n = 7, score = 100
            //   8bfe                 | mov                 edi, esi
            //   83e71f               | and                 edi, 0x1f
            //   c1e706               | shl                 edi, 6
            //   8b049d18ab0110       | mov                 eax, dword ptr [ebx*4 + 0x1001ab18]
            //   0fbe443804           | movsx               eax, byte ptr [eax + edi + 4]
            //   83e001               | and                 eax, 1
            //   750a                 | jne                 0xc

        $sequence_8 = { 8b048518ab0110 ff3401 ff15???????? 85c0 0f84ee020000 39b53ce5ffff }
            // n = 6, score = 100
            //   8b048518ab0110       | mov                 eax, dword ptr [eax*4 + 0x1001ab18]
            //   ff3401               | push                dword ptr [ecx + eax]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f84ee020000         | je                  0x2f4
            //   39b53ce5ffff         | cmp                 dword ptr [ebp - 0x1ac4], esi

        $sequence_9 = { 6a00 50 e8???????? 83c40c c78424d40200005656424d 8d8424d4020000 c78424d802000054304645 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c78424d40200005656424d     | mov    dword ptr [esp + 0x2d4], 0x4d425656
            //   8d8424d4020000       | lea                 eax, [esp + 0x2d4]
            //   c78424d802000054304645     | mov    dword ptr [esp + 0x2d8], 0x45463054

    condition:
        7 of them and filesize < 253952
}