rule win_tokyox_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { c78550ffffff44000000 51 33c0 c7857cffffff01010000 837df010 }
            // n = 5, score = 200
            //   c78550ffffff44000000     | mov    dword ptr [ebp - 0xb0], 0x44
            //   51                   | push                ecx
            //   33c0                 | xor                 eax, eax
            //   c7857cffffff01010000     | mov    dword ptr [ebp - 0x84], 0x101
            //   837df010             | cmp                 dword ptr [ebp - 0x10], 0x10

        $sequence_1 = { 50 ffd6 c7470400000000 8b07 85c0 0f8405feffff 50 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   c7470400000000       | mov                 dword ptr [edi + 4], 0
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   85c0                 | test                eax, eax
            //   0f8405feffff         | je                  0xfffffe0b
            //   50                   | push                eax

        $sequence_2 = { 6a00 68e9fd0000 ff15???????? 894508 33db 40 b902000000 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   68e9fd0000           | push                0xfde9
            //   ff15????????         |                     
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   33db                 | xor                 ebx, ebx
            //   40                   | inc                 eax
            //   b902000000           | mov                 ecx, 2

        $sequence_3 = { ff15???????? 83f8ff 7487 5f 5e }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   7487                 | je                  0xffffff89
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_4 = { 83f808 8975b0 8b45fc 0f43cb }
            // n = 4, score = 200
            //   83f808               | cmp                 eax, 8
            //   8975b0               | mov                 dword ptr [ebp - 0x50], esi
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   0f43cb               | cmovae              ecx, ebx

        $sequence_5 = { 50 894508 e8???????? 8b33 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   e8????????           |                     
            //   8b33                 | mov                 esi, dword ptr [ebx]

        $sequence_6 = { 8b451c 83c404 8b00 85c0 7428 50 e8???????? }
            // n = 7, score = 200
            //   8b451c               | mov                 eax, dword ptr [ebp + 0x1c]
            //   83c404               | add                 esp, 4
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   85c0                 | test                eax, eax
            //   7428                 | je                  0x2a
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { 33f6 0f57c0 6a20 53 }
            // n = 4, score = 200
            //   33f6                 | xor                 esi, esi
            //   0f57c0               | xorps               xmm0, xmm0
            //   6a20                 | push                0x20
            //   53                   | push                ebx

        $sequence_8 = { 0f84a4010000 50 e9???????? 8b1d???????? 68fe010000 8d85ecfdffff }
            // n = 6, score = 200
            //   0f84a4010000         | je                  0x1aa
            //   50                   | push                eax
            //   e9????????           |                     
            //   8b1d????????         |                     
            //   68fe010000           | push                0x1fe
            //   8d85ecfdffff         | lea                 eax, [ebp - 0x214]

        $sequence_9 = { 68fe010000 8d44244c 6a00 50 e8???????? 83c40c 8d442410 }
            // n = 7, score = 200
            //   68fe010000           | push                0x1fe
            //   8d44244c             | lea                 eax, [esp + 0x4c]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d442410             | lea                 eax, [esp + 0x10]

    condition:
        7 of them and filesize < 237568
}