rule win_rifdoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.rifdoor."
        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.rifdoor"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 32d9 22da 8ad0 22d1 32da }
            // n = 5, score = 200
            //   32d9                 | xor                 bl, cl
            //   22da                 | and                 bl, dl
            //   8ad0                 | mov                 dl, al
            //   22d1                 | and                 dl, cl
            //   32da                 | xor                 bl, dl

        $sequence_1 = { 8b420c 51 ffd0 85c0 0f85d7010000 8b4c2408 50 }
            // n = 7, score = 200
            //   8b420c               | mov                 eax, dword ptr [edx + 0xc]
            //   51                   | push                ecx
            //   ffd0                 | call                eax
            //   85c0                 | test                eax, eax
            //   0f85d7010000         | jne                 0x1dd
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   50                   | push                eax

        $sequence_2 = { 8d442410 50 895c2414 b814000000 b9???????? e8???????? }
            // n = 6, score = 200
            // 
            //   50                   | push                eax
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   b814000000           | mov                 eax, 0x14
            //   b9????????           |                     
            //   e8????????           |                     

        $sequence_3 = { 8bce c1f905 8b0c8d605d4100 83e61f c1e606 89040e 8bc3 }
            // n = 7, score = 200
            //   8bce                 | mov                 ecx, esi
            //   c1f905               | sar                 ecx, 5
            //   8b0c8d605d4100       | mov                 ecx, dword ptr [ecx*4 + 0x415d60]
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   89040e               | mov                 dword ptr [esi + ecx], eax
            //   8bc3                 | mov                 eax, ebx

        $sequence_4 = { 83e61f c1e606 033485605d4100 8b45e4 }
            // n = 4, score = 200
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   033485605d4100       | add                 esi, dword ptr [eax*4 + 0x415d60]
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]

        $sequence_5 = { 7508 c744242401000000 8d4c2410 51 b810000000 }
            // n = 5, score = 200
            //   7508                 | jne                 0xa
            //   c744242401000000     | mov                 dword ptr [esp + 0x24], 1
            //   8d4c2410             | lea                 ecx, dword ptr [esp + 0x10]
            //   51                   | push                ecx
            //   b810000000           | mov                 eax, 0x10

        $sequence_6 = { 7517 395c2424 7511 3bc3 }
            // n = 4, score = 200
            //   7517                 | jne                 0x19
            //   395c2424             | cmp                 dword ptr [esp + 0x24], ebx
            //   7511                 | jne                 0x13
            //   3bc3                 | cmp                 eax, ebx

        $sequence_7 = { 6689442404 8d9b00000000 8a88645b4100 884c0408 40 84c9 75f1 }
            // n = 7, score = 200
            //   6689442404           | mov                 word ptr [esp + 4], ax
            //   8d9b00000000         | lea                 ebx, dword ptr [ebx]
            //   8a88645b4100         | mov                 cl, byte ptr [eax + 0x415b64]
            //   884c0408             | mov                 byte ptr [esp + eax + 8], cl
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl
            //   75f1                 | jne                 0xfffffff3

        $sequence_8 = { 803900 8bc1 75f5 33f6 }
            // n = 4, score = 100
            //   803900               | cmp                 byte ptr [ecx], 0
            //   8bc1                 | mov                 eax, ecx
            //   75f5                 | jne                 0xfffffff7
            //   33f6                 | xor                 esi, esi

        $sequence_9 = { 51 ffd3 a3???????? eb2c }
            // n = 4, score = 100
            //   51                   | push                ecx
            //   ffd3                 | call                ebx
            //   a3????????           |                     
            //   eb2c                 | jmp                 0x2e

        $sequence_10 = { 53 ff15???????? 83c664 ff8d70fcffff 7587 }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   83c664               | add                 esi, 0x64
            //   ff8d70fcffff         | dec                 dword ptr [ebp - 0x390]
            //   7587                 | jne                 0xffffff89

        $sequence_11 = { b85b4c0000 85c9 0f8eb2000000 8b8d60c5ffff 8d9574c5ffff 2bca }
            // n = 6, score = 100
            //   b85b4c0000           | mov                 eax, 0x4c5b
            //   85c9                 | test                ecx, ecx
            //   0f8eb2000000         | jle                 0xb8
            //   8b8d60c5ffff         | mov                 ecx, dword ptr [ebp - 0x3aa0]
            //   8d9574c5ffff         | lea                 edx, dword ptr [ebp - 0x3a8c]
            //   2bca                 | sub                 ecx, edx

        $sequence_12 = { 8d9b00000000 8b85f4f7ffff 8b08 8d95f0f7ffff 52 }
            // n = 5, score = 100
            //   8d9b00000000         | lea                 ebx, dword ptr [ebx]
            //   8b85f4f7ffff         | mov                 eax, dword ptr [ebp - 0x80c]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8d95f0f7ffff         | lea                 edx, dword ptr [ebp - 0x810]
            //   52                   | push                edx

        $sequence_13 = { 85ff 744a 81ffb7000000 7442 83ff03 756b }
            // n = 6, score = 100
            //   85ff                 | test                edi, edi
            //   744a                 | je                  0x4c
            //   81ffb7000000         | cmp                 edi, 0xb7
            //   7442                 | je                  0x44
            //   83ff03               | cmp                 edi, 3
            //   756b                 | jne                 0x6d

        $sequence_14 = { 8b8d50bdffff 3bcb 7436 3bc3 7432 8b4508 }
            // n = 6, score = 100
            //   8b8d50bdffff         | mov                 ecx, dword ptr [ebp - 0x42b0]
            //   3bcb                 | cmp                 ecx, ebx
            //   7436                 | je                  0x38
            //   3bc3                 | cmp                 eax, ebx
            //   7432                 | je                  0x34
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_15 = { 8d45e8 eb0f 8d7801 e8???????? 85c0 8d45e8 7543 }
            // n = 7, score = 100
            //   8d45e8               | lea                 eax, dword ptr [ebp - 0x18]
            //   eb0f                 | jmp                 0x11
            //   8d7801               | lea                 edi, dword ptr [eax + 1]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   8d45e8               | lea                 eax, dword ptr [ebp - 0x18]
            //   7543                 | jne                 0x45

    condition:
        7 of them and filesize < 212992
}