rule win_rifdoor_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.rifdoor"
        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 = { 8d4314 b9???????? 895c2414 e8???????? 8b542414 8be8 52 }
            // n = 7, score = 100
            //   8d4314               | lea                 eax, [ebx + 0x14]
            //   b9????????           |                     
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   e8????????           |                     
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]
            //   8be8                 | mov                 ebp, eax
            //   52                   | push                edx

        $sequence_1 = { a1???????? a3???????? a1???????? c705????????4c944000 8935???????? a3???????? ff15???????? }
            // n = 7, score = 100
            //   a1????????           |                     
            //   a3????????           |                     
            //   a1????????           |                     
            //   c705????????4c944000     |     
            //   8935????????         |                     
            //   a3????????           |                     
            //   ff15????????         |                     

        $sequence_2 = { 33f6 33ff 897dfc 3b1cfd78414100 }
            // n = 4, score = 100
            //   33f6                 | xor                 esi, esi
            //   33ff                 | xor                 edi, edi
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   3b1cfd78414100       | cmp                 ebx, dword ptr [edi*8 + 0x414178]

        $sequence_3 = { 32db 3bc1 7d0e 885c301c 017e5c 8b465c }
            // n = 6, score = 100
            //   32db                 | xor                 bl, bl
            //   3bc1                 | cmp                 eax, ecx
            //   7d0e                 | jge                 0x10
            //   885c301c             | mov                 byte ptr [eax + esi + 0x1c], bl
            //   017e5c               | add                 dword ptr [esi + 0x5c], edi
            //   8b465c               | mov                 eax, dword ptr [esi + 0x5c]

        $sequence_4 = { 8bc6 5e 5d 59 c3 5b 5e }
            // n = 7, score = 100
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   59                   | pop                 ecx
            //   c3                   | ret                 
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi

        $sequence_5 = { 83e804 83c104 83f804 73e9 c744241801000000 8b442410 8b08 }
            // n = 7, score = 100
            //   83e804               | sub                 eax, 4
            //   83c104               | add                 ecx, 4
            //   83f804               | cmp                 eax, 4
            //   73e9                 | jae                 0xffffffeb
            //   c744241801000000     | mov                 dword ptr [esp + 0x18], 1
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_6 = { 8bc8 c1f905 83e01f c1e006 03048d605d4100 eb05 }
            // n = 6, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   c1f905               | sar                 ecx, 5
            //   83e01f               | and                 eax, 0x1f
            //   c1e006               | shl                 eax, 6
            //   03048d605d4100       | add                 eax, dword ptr [ecx*4 + 0x415d60]
            //   eb05                 | jmp                 7

        $sequence_7 = { 50 ff15???????? 8d4c2408 51 b80c000000 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d4c2408             | lea                 ecx, [esp + 8]
            //   51                   | push                ecx
            //   b80c000000           | mov                 eax, 0xc

        $sequence_8 = { 57 8d3c85605d4100 8b07 83e61f }
            // n = 4, score = 100
            //   57                   | push                edi
            //   8d3c85605d4100       | lea                 edi, [eax*4 + 0x415d60]
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   83e61f               | and                 esi, 0x1f

        $sequence_9 = { 7313 6a64 ff15???????? 3bf7 7cc8 5b 8bc6 }
            // n = 7, score = 100
            //   7313                 | jae                 0x15
            //   6a64                 | push                0x64
            //   ff15????????         |                     
            //   3bf7                 | cmp                 esi, edi
            //   7cc8                 | jl                  0xffffffca
            //   5b                   | pop                 ebx
            //   8bc6                 | mov                 eax, esi

    condition:
        7 of them and filesize < 212992
}