rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 8d85f4fbffff 57 50 ff7508 ffd6 85c0 }
            // n = 6, score = 300
            //   8d85f4fbffff         | lea                 eax, dword ptr [ebp - 0x40c]
            //   57                   | push                edi
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax

        $sequence_1 = { e8???????? 8b3d???????? 83f86f 750c 56 ffd7 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   8b3d????????         |                     
            //   83f86f               | cmp                 eax, 0x6f
            //   750c                 | jne                 0xe
            //   56                   | push                esi
            //   ffd7                 | call                edi

        $sequence_2 = { 33c0 8d7104 880406 40 3d00010000 7cf5 c745fcfcffffff }
            // n = 7, score = 300
            //   33c0                 | xor                 eax, eax
            //   8d7104               | lea                 esi, dword ptr [ecx + 4]
            //   880406               | mov                 byte ptr [esi + eax], al
            //   40                   | inc                 eax
            //   3d00010000           | cmp                 eax, 0x100
            //   7cf5                 | jl                  0xfffffff7
            //   c745fcfcffffff       | mov                 dword ptr [ebp - 4], 0xfffffffc

        $sequence_3 = { 0fbe01 48 48 0f8472030000 48 0f8447030000 }
            // n = 6, score = 300
            //   0fbe01               | movsx               eax, byte ptr [ecx]
            //   48                   | dec                 eax
            //   48                   | dec                 eax
            //   0f8472030000         | je                  0x378
            //   48                   | dec                 eax
            //   0f8447030000         | je                  0x34d

        $sequence_4 = { ff35???????? ffd6 99 b940420f00 f7f9 8d45f0 52 }
            // n = 7, score = 300
            //   ff35????????         |                     
            //   ffd6                 | call                esi
            //   99                   | cdq                 
            //   b940420f00           | mov                 ecx, 0xf4240
            //   f7f9                 | idiv                ecx
            //   8d45f0               | lea                 eax, dword ptr [ebp - 0x10]
            //   52                   | push                edx

        $sequence_5 = { 50 ff7508 56 57 ff15???????? 8b45ec 8d4df0 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   56                   | push                esi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8d4df0               | lea                 ecx, dword ptr [ebp - 0x10]

        $sequence_6 = { 8d45dc 50 8d45fc 50 51 8d45f0 }
            // n = 6, score = 300
            //   8d45dc               | lea                 eax, dword ptr [ebp - 0x24]
            //   50                   | push                eax
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8d45f0               | lea                 eax, dword ptr [ebp - 0x10]

        $sequence_7 = { 57 ff15???????? 57 ffd6 33ff ff750c }
            // n = 6, score = 300
            //   57                   | push                edi
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   33ff                 | xor                 edi, edi
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_8 = { 6a02 6a30 57 ff15???????? 85c0 7504 33c0 }
            // n = 7, score = 300
            //   6a02                 | push                2
            //   6a30                 | push                0x30
            //   57                   | push                edi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 889c05f4fbffff 50 8d85f4fbffff 6a01 50 }
            // n = 5, score = 300
            //   889c05f4fbffff       | mov                 byte ptr [ebp + eax - 0x40c], bl
            //   50                   | push                eax
            //   8d85f4fbffff         | lea                 eax, dword ptr [ebp - 0x40c]
            //   6a01                 | push                1
            //   50                   | push                eax

    condition:
        7 of them and filesize < 49152
}