rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        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 = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 8bf9 7502 33db 8a0c3e }
            // n = 4, score = 300
            //   8bf9                 | mov                 edi, ecx
            //   7502                 | jne                 4
            //   33db                 | xor                 ebx, ebx
            //   8a0c3e               | mov                 cl, byte ptr [esi + edi]

        $sequence_1 = { 395d10 7e1b 56 8b450c }
            // n = 4, score = 300
            //   395d10               | cmp                 dword ptr [ebp + 0x10], ebx
            //   7e1b                 | jle                 0x1d
            //   56                   | push                esi
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]

        $sequence_2 = { 50 8d8594faffff 50 e8???????? 59 }
            // n = 5, score = 300
            //   50                   | push                eax
            //   8d8594faffff         | lea                 eax, [ebp - 0x56c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_3 = { 59 8d85a0fdffff 59 50 e8???????? }
            // n = 5, score = 300
            //   59                   | pop                 ecx
            //   8d85a0fdffff         | lea                 eax, [ebp - 0x260]
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { 48 0f8472010000 48 48 0f856b030000 }
            // n = 5, score = 300
            //   48                   | dec                 eax
            //   0f8472010000         | je                  0x178
            //   48                   | dec                 eax
            //   48                   | dec                 eax
            //   0f856b030000         | jne                 0x371

        $sequence_5 = { 66ab aa 895dfc ffd6 40 85c0 7e29 }
            // n = 7, score = 300
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   ffd6                 | call                esi
            //   40                   | inc                 eax
            //   85c0                 | test                eax, eax
            //   7e29                 | jle                 0x2b

        $sequence_6 = { 817ddc04010000 0f8d5e030000 41 8d859cfcffff 51 50 }
            // n = 6, score = 300
            //   817ddc04010000       | cmp                 dword ptr [ebp - 0x24], 0x104
            //   0f8d5e030000         | jge                 0x364
            //   41                   | inc                 ecx
            //   8d859cfcffff         | lea                 eax, [ebp - 0x364]
            //   51                   | push                ecx
            //   50                   | push                eax

        $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 = { ff15???????? 8bf0 3bf7 8975ec 7509 53 ff15???????? }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   3bf7                 | cmp                 esi, edi
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   7509                 | jne                 0xb
            //   53                   | push                ebx
            //   ff15????????         |                     

        $sequence_9 = { ff75f0 ffd6 8d4d08 885dfc e8???????? 834dfcff 8d4d10 }
            // n = 7, score = 300
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ffd6                 | call                esi
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   885dfc               | mov                 byte ptr [ebp - 4], bl
            //   e8????????           |                     
            //   834dfcff             | or                  dword ptr [ebp - 4], 0xffffffff
            //   8d4d10               | lea                 ecx, [ebp + 0x10]

    condition:
        7 of them and filesize < 49152
}