rule win_tokyox_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.tokyox."
        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.tokyox"
        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 = { ff700c 8b08 ff7008 e8???????? 8945e4 3de22e0000 }
            // n = 6, score = 200
            //   ff700c               | push                dword ptr [eax + 0xc]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   ff7008               | push                dword ptr [eax + 8]
            //   e8????????           |                     
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   3de22e0000           | cmp                 eax, 0x2ee2

        $sequence_1 = { 0fb6c3 50 8b45f0 0fb6c0 }
            // n = 4, score = 200
            //   0fb6c3               | movzx               eax, bl
            //   50                   | push                eax
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   0fb6c0               | movzx               eax, al

        $sequence_2 = { c745d800000000 c70000000000 8d5102 c745dc07000000 668b01 83c102 }
            // n = 6, score = 200
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   c70000000000         | mov                 dword ptr [eax], 0
            //   8d5102               | lea                 edx, [ecx + 2]
            //   c745dc07000000       | mov                 dword ptr [ebp - 0x24], 7
            //   668b01               | mov                 ax, word ptr [ecx]
            //   83c102               | add                 ecx, 2

        $sequence_3 = { 0f1045a0 56 50 0f114710 0f1045b0 }
            // n = 5, score = 200
            //   0f1045a0             | movups              xmm0, xmmword ptr [ebp - 0x60]
            //   56                   | push                esi
            //   50                   | push                eax
            //   0f114710             | movups              xmmword ptr [edi + 0x10], xmm0
            //   0f1045b0             | movups              xmm0, xmmword ptr [ebp - 0x50]

        $sequence_4 = { ff15???????? 8b450c 8930 33f6 eb11 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8930                 | mov                 dword ptr [eax], esi
            //   33f6                 | xor                 esi, esi
            //   eb11                 | jmp                 0x13

        $sequence_5 = { 8b7dfc 8bd8 895db0 eb6d }
            // n = 4, score = 200
            //   8b7dfc               | mov                 edi, dword ptr [ebp - 4]
            //   8bd8                 | mov                 ebx, eax
            //   895db0               | mov                 dword ptr [ebp - 0x50], ebx
            //   eb6d                 | jmp                 0x6f

        $sequence_6 = { ff730c ffd7 e9???????? 8d8550ffffff 0f57c0 50 0f114310 }
            // n = 7, score = 200
            //   ff730c               | push                dword ptr [ebx + 0xc]
            //   ffd7                 | call                edi
            //   e9????????           |                     
            //   8d8550ffffff         | lea                 eax, [ebp - 0xb0]
            //   0f57c0               | xorps               xmm0, xmm0
            //   50                   | push                eax
            //   0f114310             | movups              xmmword ptr [ebx + 0x10], xmm0

        $sequence_7 = { 814dfc00310000 8d45fc 8b35???????? 50 6a1f ff7708 ffd6 }
            // n = 7, score = 200
            //   814dfc00310000       | or                  dword ptr [ebp - 4], 0x3100
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   8b35????????         |                     
            //   50                   | push                eax
            //   6a1f                 | push                0x1f
            //   ff7708               | push                dword ptr [edi + 8]
            //   ffd6                 | call                esi

        $sequence_8 = { 6a00 0f104010 0f114224 8b4308 0f1000 }
            // n = 5, score = 200
            //   6a00                 | push                0
            //   0f104010             | movups              xmm0, xmmword ptr [eax + 0x10]
            //   0f114224             | movups              xmmword ptr [edx + 0x24], xmm0
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   0f1000               | movups              xmm0, xmmword ptr [eax]

        $sequence_9 = { 8b45d0 83c434 0f1085c8feffff 0f1100 6a20 0f1085d8feffff }
            // n = 6, score = 200
            //   8b45d0               | mov                 eax, dword ptr [ebp - 0x30]
            //   83c434               | add                 esp, 0x34
            //   0f1085c8feffff       | movups              xmm0, xmmword ptr [ebp - 0x138]
            //   0f1100               | movups              xmmword ptr [eax], xmm0
            //   6a20                 | push                0x20
            //   0f1085d8feffff       | movups              xmm0, xmmword ptr [ebp - 0x128]

    condition:
        7 of them and filesize < 237568
}