rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 33c0 8dbdedecffff 889dececffff f3ab }
            // n = 4, score = 300
            //   33c0                 | xor                 eax, eax
            //   8dbdedecffff         | lea                 edi, [ebp - 0x1313]
            //   889dececffff         | mov                 byte ptr [ebp - 0x1314], bl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_1 = { 6a01 33db 5e 8d45e0 }
            // n = 4, score = 300
            //   6a01                 | push                1
            //   33db                 | xor                 ebx, ebx
            //   5e                   | pop                 esi
            //   8d45e0               | lea                 eax, [ebp - 0x20]

        $sequence_2 = { 6880000000 6a02 53 6a02 8d85f4feffff 68000000c0 }
            // n = 6, score = 300
            //   6880000000           | push                0x80
            //   6a02                 | push                2
            //   53                   | push                ebx
            //   6a02                 | push                2
            //   8d85f4feffff         | lea                 eax, [ebp - 0x10c]
            //   68000000c0           | push                0xc0000000

        $sequence_3 = { ff75ec ff15???????? 85c0 740a 8b45dc 2bf0 }
            // n = 6, score = 300
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   740a                 | je                  0xc
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   2bf0                 | sub                 esi, eax

        $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 = { 8bf8 8b45fc 40 50 57 e8???????? 8d45a8 }
            // n = 7, score = 300
            //   8bf8                 | mov                 edi, eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   8d45a8               | lea                 eax, [ebp - 0x58]

        $sequence_6 = { 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, [ebp - 0x10]

        $sequence_7 = { 83ec10 56 8bf1 33d2 }
            // n = 4, score = 300
            //   83ec10               | sub                 esp, 0x10
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   33d2                 | xor                 edx, edx

        $sequence_8 = { 53 ff15???????? 8bf0 3bf7 8975ec 7509 53 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   3bf7                 | cmp                 esi, edi
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   7509                 | jne                 0xb
            //   53                   | push                ebx

        $sequence_9 = { 8bf9 7502 33db 8a0c3e 8808 8b4dfc }
            // n = 6, score = 300
            //   8bf9                 | mov                 edi, ecx
            //   7502                 | jne                 4
            //   33db                 | xor                 ebx, ebx
            //   8a0c3e               | mov                 cl, byte ptr [esi + edi]
            //   8808                 | mov                 byte ptr [eax], cl
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

    condition:
        7 of them and filesize < 49152
}