rule win_soundbite_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.soundbite."
        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.soundbite"
        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 = { 8bbdf8fcffff 8b9dfcfcffff 8b85f0fcffff 8d0cc500000000 2bc8 }
            // n = 5, score = 100
            //   8bbdf8fcffff         | mov                 edi, dword ptr [ebp - 0x308]
            //   8b9dfcfcffff         | mov                 ebx, dword ptr [ebp - 0x304]
            //   8b85f0fcffff         | mov                 eax, dword ptr [ebp - 0x310]
            //   8d0cc500000000       | lea                 ecx, [eax*8]
            //   2bc8                 | sub                 ecx, eax

        $sequence_1 = { 8945fc e8???????? 56 8bf8 8d75f0 e8???????? }
            // n = 6, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   e8????????           |                     
            //   56                   | push                esi
            //   8bf8                 | mov                 edi, eax
            //   8d75f0               | lea                 esi, [ebp - 0x10]
            //   e8????????           |                     

        $sequence_2 = { 8bbd74ffffff 3bf7 7430 8d9b00000000 837e1410 720b 8b06 }
            // n = 7, score = 100
            //   8bbd74ffffff         | mov                 edi, dword ptr [ebp - 0x8c]
            //   3bf7                 | cmp                 esi, edi
            //   7430                 | je                  0x32
            //   8d9b00000000         | lea                 ebx, [ebx]
            //   837e1410             | cmp                 dword ptr [esi + 0x14], 0x10
            //   720b                 | jb                  0xd
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_3 = { 8d4d08 e8???????? 8b4e08 8b11 8b02 ffd0 8945d8 }
            // n = 7, score = 100
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   e8????????           |                     
            //   8b4e08               | mov                 ecx, dword ptr [esi + 8]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   ffd0                 | call                eax
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax

        $sequence_4 = { 55 8bec 57 8bf8 3b7d08 7458 53 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   57                   | push                edi
            //   8bf8                 | mov                 edi, eax
            //   3b7d08               | cmp                 edi, dword ptr [ebp + 8]
            //   7458                 | je                  0x5a
            //   53                   | push                ebx

        $sequence_5 = { c645fc0f 85db 742e 8d95f4feffff 52 8b8dfcfcffff c743140f000000 }
            // n = 7, score = 100
            //   c645fc0f             | mov                 byte ptr [ebp - 4], 0xf
            //   85db                 | test                ebx, ebx
            //   742e                 | je                  0x30
            //   8d95f4feffff         | lea                 edx, [ebp - 0x10c]
            //   52                   | push                edx
            //   8b8dfcfcffff         | mov                 ecx, dword ptr [ebp - 0x304]
            //   c743140f000000       | mov                 dword ptr [ebx + 0x14], 0xf

        $sequence_6 = { 84c9 75f9 2bc2 8bf8 8d45e4 8d75b0 e8???????? }
            // n = 7, score = 100
            //   84c9                 | test                cl, cl
            //   75f9                 | jne                 0xfffffffb
            //   2bc2                 | sub                 eax, edx
            //   8bf8                 | mov                 edi, eax
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   8d75b0               | lea                 esi, [ebp - 0x50]
            //   e8????????           |                     

        $sequence_7 = { 8b5204 8b3482 8bc3 8bce e8???????? 8b4310 8345102c }
            // n = 7, score = 100
            //   8b5204               | mov                 edx, dword ptr [edx + 4]
            //   8b3482               | mov                 esi, dword ptr [edx + eax*4]
            //   8bc3                 | mov                 eax, ebx
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b4310               | mov                 eax, dword ptr [ebx + 0x10]
            //   8345102c             | add                 dword ptr [ebp + 0x10], 0x2c

        $sequence_8 = { 33ff 397b10 0f84a7000000 8b4310 }
            // n = 4, score = 100
            //   33ff                 | xor                 edi, edi
            //   397b10               | cmp                 dword ptr [ebx + 0x10], edi
            //   0f84a7000000         | je                  0xad
            //   8b4310               | mov                 eax, dword ptr [ebx + 0x10]

        $sequence_9 = { 41 894d0c 83fe03 7577 8a4df0 8ad1 80e103 }
            // n = 7, score = 100
            //   41                   | inc                 ecx
            //   894d0c               | mov                 dword ptr [ebp + 0xc], ecx
            //   83fe03               | cmp                 esi, 3
            //   7577                 | jne                 0x79
            //   8a4df0               | mov                 cl, byte ptr [ebp - 0x10]
            //   8ad1                 | mov                 dl, cl
            //   80e103               | and                 cl, 3

    condition:
        7 of them and filesize < 409600
}