rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.taidoor"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 53 56 57 a0???????? 33ff }
            // n = 5, score = 300
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   a0????????           |                     
            //   33ff                 | xor                 edi, edi

        $sequence_1 = { 33d2 6a20 f775fc 8bf2 }
            // n = 4, score = 300
            //   33d2                 | xor                 edx, edx
            //   6a20                 | push                0x20
            //   f775fc               | div                 dword ptr [ebp - 4]
            //   8bf2                 | mov                 esi, edx

        $sequence_2 = { 8dbdecfcffff 8b4d10 8b45fc 8a0408 3c5c }
            // n = 5, score = 300
            //   8dbdecfcffff         | lea                 edi, [ebp - 0x314]
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8a0408               | mov                 al, byte ptr [eax + ecx]
            //   3c5c                 | cmp                 al, 0x5c

        $sequence_3 = { 8d41fd 53 56 85c0 57 }
            // n = 5, score = 300
            //   8d41fd               | lea                 eax, [ecx - 3]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   85c0                 | test                eax, eax
            //   57                   | push                edi

        $sequence_4 = { 7e1b 56 8b450c 8d8de8feffff 8d3403 e8???????? 3006 }
            // n = 7, score = 300
            //   7e1b                 | jle                 0x1d
            //   56                   | push                esi
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8d8de8feffff         | lea                 ecx, [ebp - 0x118]
            //   8d3403               | lea                 esi, [ebx + eax]
            //   e8????????           |                     
            //   3006                 | xor                 byte ptr [esi], al

        $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 = { 8bec b814130000 e8???????? 53 }
            // n = 4, score = 300
            //   8bec                 | mov                 ebp, esp
            //   b814130000           | mov                 eax, 0x1314
            //   e8????????           |                     
            //   53                   | push                ebx

        $sequence_7 = { 8d45dc 50 8d45fc 50 51 8d45f0 }
            // n = 6, score = 300
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8d45f0               | lea                 eax, [ebp - 0x10]

        $sequence_8 = { 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_9 = { 53 6a02 8d85f4feffff 68000000c0 }
            // n = 4, score = 300
            //   53                   | push                ebx
            //   6a02                 | push                2
            //   8d85f4feffff         | lea                 eax, [ebp - 0x10c]
            //   68000000c0           | push                0xc0000000

    condition:
        7 of them and filesize < 49152
}