rule win_taidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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 = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 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_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 = { ff7510 ff15???????? ff7510 ff15???????? 8d85f0fdffff }
            // n = 5, score = 300
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff15????????         |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff15????????         |                     
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]

        $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 = { 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, [ebp - 0x10]
            //   52                   | push                edx

        $sequence_6 = { 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_7 = { b940420f00 f7f9 8d45e0 52 ff35???????? ff35???????? }
            // n = 6, score = 300
            //   b940420f00           | mov                 ecx, 0xf4240
            //   f7f9                 | idiv                ecx
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   52                   | push                edx
            //   ff35????????         |                     
            //   ff35????????         |                     

        $sequence_8 = { e9???????? 8d4de0 e8???????? 8d8588f7ffff 50 ff35???????? ffd6 }
            // n = 7, score = 300
            //   e9????????           |                     
            //   8d4de0               | lea                 ecx, [ebp - 0x20]
            //   e8????????           |                     
            //   8d8588f7ffff         | lea                 eax, [ebp - 0x878]
            //   50                   | push                eax
            //   ff35????????         |                     
            //   ffd6                 | call                esi

        $sequence_9 = { ff7510 f3ab 8b35???????? 895df8 66ab }
            // n = 5, score = 300
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b35????????         |                     
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   66ab                 | stosw               word ptr es:[edi], ax

    condition:
        7 of them and filesize < 49152
}