rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.taidoor."
        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.taidoor"
        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 = { 99 b940420f00 f7f9 8d45f8 }
            // n = 4, score = 300
            //   99                   | cdq                 
            //   b940420f00           | mov                 ecx, 0xf4240
            //   f7f9                 | idiv                ecx
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_1 = { ff7508 ff75f0 ff15???????? 8b35???????? 3bc3 89450c 7505 }
            // n = 7, score = 300
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   3bc3                 | cmp                 eax, ebx
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   7505                 | jne                 7

        $sequence_2 = { 7441 0fb68699010000 50 0fb68698010000 50 0fb68697010000 }
            // n = 6, score = 300
            //   7441                 | je                  0x43
            //   0fb68699010000       | movzx               eax, byte ptr [esi + 0x199]
            //   50                   | push                eax
            //   0fb68698010000       | movzx               eax, byte ptr [esi + 0x198]
            //   50                   | push                eax
            //   0fb68697010000       | movzx               eax, byte ptr [esi + 0x197]

        $sequence_3 = { 83a00401000000 b001 c9 c20800 8b8104010000 }
            // n = 5, score = 300
            //   83a00401000000       | and                 dword ptr [eax + 0x104], 0
            //   b001                 | mov                 al, 1
            //   c9                   | leave               
            //   c20800               | ret                 8
            //   8b8104010000         | mov                 eax, dword ptr [ecx + 0x104]

        $sequence_4 = { 57 a0???????? c745fc01000000 8ac8 f6d9 1bc9 33db }
            // n = 7, score = 300
            //   57                   | push                edi
            //   a0????????           |                     
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   8ac8                 | mov                 cl, al
            //   f6d9                 | neg                 cl
            //   1bc9                 | sbb                 ecx, ecx
            //   33db                 | xor                 ebx, ebx

        $sequence_5 = { 8b4d08 50 e8???????? c745e801000000 8065fc00 }
            // n = 5, score = 300
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   c745e801000000       | mov                 dword ptr [ebp - 0x18], 1
            //   8065fc00             | and                 byte ptr [ebp - 4], 0

        $sequence_6 = { 751f a1???????? 69c0e8030000 50 ff15???????? 8d4df0 }
            // n = 6, score = 300
            //   751f                 | jne                 0x21
            //   a1????????           |                     
            //   69c0e8030000         | imul                eax, eax, 0x3e8
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d4df0               | lea                 ecx, [ebp - 0x10]

        $sequence_7 = { 6a04 8d45d4 51 50 e8???????? 8b45d4 83c40c }
            // n = 7, score = 300
            //   6a04                 | push                4
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   83c40c               | add                 esp, 0xc

        $sequence_8 = { 53 6a02 8d85f4feffff 68000000c0 }
            // n = 4, score = 300
            //   53                   | push                ebx
            //   6a02                 | push                2
            //   8d85f4feffff         | lea                 eax, [ebp - 0x10c]
            //   68000000c0           | push                0xc0000000

        $sequence_9 = { e8???????? ff75ec 8d85a0fdffff 50 51 8bcc 8965f4 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   8d85a0fdffff         | lea                 eax, [ebp - 0x260]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp
            //   8965f4               | mov                 dword ptr [ebp - 0xc], esp

    condition:
        7 of them and filesize < 49152
}