rule win_rifdoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { c1f805 83e71f c1e706 8b0485605d4100 8d44380c 50 }
            // n = 6, score = 200
            //   c1f805               | sar                 eax, 5
            //   83e71f               | and                 edi, 0x1f
            //   c1e706               | shl                 edi, 6
            //   8b0485605d4100       | mov                 eax, dword ptr [eax*4 + 0x415d60]
            //   8d44380c             | lea                 eax, [eax + edi + 0xc]
            //   50                   | push                eax

        $sequence_1 = { 41 83f903 771e ff248dd8164000 50 e8???????? 83c404 }
            // n = 7, score = 200
            // 
            //   83f903               | cmp                 ecx, 3
            //   771e                 | ja                  0x20
            //   ff248dd8164000       | jmp                 dword ptr [ecx*4 + 0x4016d8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_2 = { 55 57 ffd6 a3???????? 895c2410 8d4c2410 }
            // n = 6, score = 200
            //   55                   | push                ebp
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   a3????????           |                     
            //   895c2410             | mov                 dword ptr [esp + 0x10], ebx
            //   8d4c2410             | lea                 ecx, [esp + 0x10]

        $sequence_3 = { 89842484000000 53 57 33ff 57 897c2410 897c240c }
            // n = 7, score = 200
            //   89842484000000       | mov                 dword ptr [esp + 0x84], eax
            //   53                   | push                ebx
            //   57                   | push                edi
            //   33ff                 | xor                 edi, edi
            //   57                   | push                edi
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   897c240c             | mov                 dword ptr [esp + 0xc], edi

        $sequence_4 = { 68???????? 668907 e8???????? 83c408 8bc6 8d5001 5f }
            // n = 7, score = 200
            //   68????????           |                     
            //   668907               | mov                 word ptr [edi], ax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bc6                 | mov                 eax, esi
            //   8d5001               | lea                 edx, [eax + 1]
            //   5f                   | pop                 edi

        $sequence_5 = { 8b465c 885c061c 017e5c 394e5c 7cf1 eb19 }
            // n = 6, score = 200
            //   8b465c               | mov                 eax, dword ptr [esi + 0x5c]
            //   885c061c             | mov                 byte ptr [esi + eax + 0x1c], bl
            //   017e5c               | add                 dword ptr [esi + 0x5c], edi
            //   394e5c               | cmp                 dword ptr [esi + 0x5c], ecx
            //   7cf1                 | jl                  0xfffffff3
            //   eb19                 | jmp                 0x1b

        $sequence_6 = { 66890c45f4594100 40 ebe8 33c0 8945e4 3d01010000 7d0d }
            // n = 7, score = 200
            //   66890c45f4594100     | mov                 word ptr [eax*2 + 0x4159f4], cx
            //   40                   | inc                 eax
            //   ebe8                 | jmp                 0xffffffea
            //   33c0                 | xor                 eax, eax
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   3d01010000           | cmp                 eax, 0x101
            //   7d0d                 | jge                 0xf

        $sequence_7 = { 8d4318 b9???????? 895c2414 e8???????? 8be8 }
            // n = 5, score = 200
            //   8d4318               | lea                 eax, [ebx + 0x18]
            //   b9????????           |                     
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   e8????????           |                     
            //   8be8                 | mov                 ebp, eax

        $sequence_8 = { 53 6800000040 57 899df4f7ffff ff15???????? 8bf8 }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   6800000040           | push                0x40000000
            //   57                   | push                edi
            //   899df4f7ffff         | mov                 dword ptr [ebp - 0x80c], ebx
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_9 = { 8b4e04 e8???????? 85c0 7521 68???????? }
            // n = 5, score = 100
            //   8b4e04               | mov                 ecx, dword ptr [esi + 4]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7521                 | jne                 0x23
            //   68????????           |                     

        $sequence_10 = { ff15???????? 68???????? 8d4d98 51 ff15???????? 807d9800 8d4598 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   68????????           |                     
            //   8d4d98               | lea                 ecx, [ebp - 0x68]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   807d9800             | cmp                 byte ptr [ebp - 0x68], 0
            //   8d4598               | lea                 eax, [ebp - 0x68]

        $sequence_11 = { 8bf0 83e680 33d6 8bf0 c1ee08 c1e211 0bd6 }
            // n = 7, score = 100
            //   8bf0                 | mov                 esi, eax
            //   83e680               | and                 esi, 0xffffff80
            //   33d6                 | xor                 edx, esi
            //   8bf0                 | mov                 esi, eax
            //   c1ee08               | shr                 esi, 8
            //   c1e211               | shl                 edx, 0x11
            //   0bd6                 | or                  edx, esi

        $sequence_12 = { 50 ff15???????? c744240c60ea0000 eba0 53 e8???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   c744240c60ea0000     | mov                 dword ptr [esp + 0xc], 0xea60
            //   eba0                 | jmp                 0xffffffa2
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_13 = { 85c0 7e06 03f8 2bf0 eb2d 83f8ff 0f85ee000000 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7e06                 | jle                 8
            //   03f8                 | add                 edi, eax
            //   2bf0                 | sub                 esi, eax
            //   eb2d                 | jmp                 0x2f
            //   83f8ff               | cmp                 eax, -1
            //   0f85ee000000         | jne                 0xf4

        $sequence_14 = { 50 8d4de8 51 8d95e8fbffff 68???????? 52 ff15???????? }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   51                   | push                ecx
            //   8d95e8fbffff         | lea                 edx, [ebp - 0x418]
            //   68????????           |                     
            //   52                   | push                edx
            //   ff15????????         |                     

        $sequence_15 = { 68???????? 8d95e8fbffff 52 ffd3 8d85e8fbffff }
            // n = 5, score = 100
            //   68????????           |                     
            //   8d95e8fbffff         | lea                 edx, [ebp - 0x418]
            //   52                   | push                edx
            //   ffd3                 | call                ebx
            //   8d85e8fbffff         | lea                 eax, [ebp - 0x418]

    condition:
        7 of them and filesize < 212992
}