rule win_rifdoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 55 57 ffd6 a3???????? 391d???????? 7474 391d???????? }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   a3????????           |                     
            //   391d????????         |                     
            //   7474                 | je                  0x76
            //   391d????????         |                     

        $sequence_1 = { 33d1 33d6 d1c2 83eb01 896818 89501c 75b4 }
            // n = 7, score = 200
            //   33d1                 | xor                 edx, ecx
            //   33d6                 | xor                 edx, esi
            //   d1c2                 | rol                 edx, 1
            //   83eb01               | sub                 ebx, 1
            //   896818               | mov                 dword ptr [eax + 0x18], ebp
            //   89501c               | mov                 dword ptr [eax + 0x1c], edx
            //   75b4                 | jne                 0xffffffb6

        $sequence_2 = { 8d442410 50 b810000000 b9???????? 895c2414 e8???????? 8b4c2414 }
            // n = 7, score = 200
            //   8d442410             | lea                 eax, dword ptr [esp + 0x10]
            //   50                   | push                eax
            //   b810000000           | mov                 eax, 0x10
            //   b9????????           |                     
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   e8????????           |                     
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]

        $sequence_3 = { 53 8b5c2418 56 6a04 6800100000 53 6a00 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   8b5c2418             | mov                 ebx, dword ptr [esp + 0x18]
            //   56                   | push                esi
            //   6a04                 | push                4
            //   6800100000           | push                0x1000
            //   53                   | push                ebx
            //   6a00                 | push                0

        $sequence_4 = { 5e 5d 33c0 5b 83c41c c3 ff25???????? }
            // n = 7, score = 200
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   33c0                 | xor                 eax, eax
            //   5b                   | pop                 ebx
            //   83c41c               | add                 esp, 0x1c
            //   c3                   | ret                 
            //   ff25????????         |                     

        $sequence_5 = { 33c4 89442434 8b442444 53 55 8b6c2448 56 }
            // n = 7, score = 200
            //   33c4                 | xor                 eax, esp
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   8b6c2448             | mov                 ebp, dword ptr [esp + 0x48]
            //   56                   | push                esi

        $sequence_6 = { 7518 8b8c2414910000 5f 5e 33cc 33c0 e8???????? }
            // n = 7, score = 200
            //   7518                 | jne                 0x1a
            //   8b8c2414910000       | mov                 ecx, dword ptr [esp + 0x9114]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   33cc                 | xor                 ecx, esp
            //   33c0                 | xor                 eax, eax
            //   e8????????           |                     

        $sequence_7 = { ffd6 8d4c2410 a3???????? 51 b818000000 b9???????? }
            // n = 6, score = 200
            //   ffd6                 | call                esi
            //   8d4c2410             | lea                 ecx, dword ptr [esp + 0x10]
            //   a3????????           |                     
            //   51                   | push                ecx
            //   b818000000           | mov                 eax, 0x18
            //   b9????????           |                     

        $sequence_8 = { ba51000000 b957000000 57 8b3d???????? 6689542426 8944241c 66894c2424 }
            // n = 7, score = 200
            //   ba51000000           | mov                 edx, 0x51
            //   b957000000           | mov                 ecx, 0x57
            //   57                   | push                edi
            //   8b3d????????         |                     
            //   6689542426           | mov                 word ptr [esp + 0x26], dx
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   66894c2424           | mov                 word ptr [esp + 0x24], cx

        $sequence_9 = { 8944241c 66894c2424 8d542424 b84c000000 33c9 52 c744241c00000000 }
            // n = 7, score = 200
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   66894c2424           | mov                 word ptr [esp + 0x24], cx
            //   8d542424             | lea                 edx, dword ptr [esp + 0x24]
            //   b84c000000           | mov                 eax, 0x4c
            //   33c9                 | xor                 ecx, ecx
            //   52                   | push                edx
            //   c744241c00000000     | mov                 dword ptr [esp + 0x1c], 0

    condition:
        7 of them and filesize < 212992
}