rule win_kimsuky_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.kimsuky"
        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 = { e8???????? 8d95ecfbffff b9???????? e8???????? }
            // n = 4, score = 400
            //   e8????????           |                     
            //   8d95ecfbffff         | lea                 edx, [ebp - 0x414]
            //   b9????????           |                     
            //   e8????????           |                     

        $sequence_1 = { 6a00 6a00 68???????? 8d85e4fbffff 50 8d45e4 50 }
            // n = 7, score = 400
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   8d85e4fbffff         | lea                 eax, [ebp - 0x41c]
            //   50                   | push                eax
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax

        $sequence_2 = { ff15???????? 85c0 7516 ff15???????? 8bd8 }
            // n = 5, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7516                 | jne                 0x18
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_3 = { 50 56 ffd7 a3???????? 8d85ccf3ffff 50 56 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   a3????????           |                     
            //   8d85ccf3ffff         | lea                 eax, [ebp - 0xc34]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_4 = { 8d85f8feffff 6804010000 50 e8???????? 8d85f0fcffff 50 }
            // n = 6, score = 400
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   6804010000           | push                0x104
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d85f0fcffff         | lea                 eax, [ebp - 0x310]
            //   50                   | push                eax

        $sequence_5 = { ff15???????? 8bd8 e8???????? 0fafd8 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     
            //   0fafd8               | imul                ebx, eax

        $sequence_6 = { 8d85f0feffff 50 68???????? ff15???????? 6a04 6a00 }
            // n = 6, score = 400
            //   8d85f0feffff         | lea                 eax, [ebp - 0x110]
            //   50                   | push                eax
            //   68????????           |                     
            //   ff15????????         |                     
            //   6a04                 | push                4
            //   6a00                 | push                0

        $sequence_7 = { 75f9 2bca 51 8d85e4f5ffff }
            // n = 4, score = 400
            //   75f9                 | jne                 0xfffffffb
            //   2bca                 | sub                 ecx, edx
            //   51                   | push                ecx
            //   8d85e4f5ffff         | lea                 eax, [ebp - 0xa1c]

        $sequence_8 = { 8d95f0fcffff b9???????? e8???????? 8d95ecfbffff }
            // n = 4, score = 400
            //   8d95f0fcffff         | lea                 edx, [ebp - 0x310]
            //   b9????????           |                     
            //   e8????????           |                     
            //   8d95ecfbffff         | lea                 edx, [ebp - 0x414]

        $sequence_9 = { a3???????? 8d85dcf7ffff 50 53 ffd7 }
            // n = 5, score = 400
            //   a3????????           |                     
            //   8d85dcf7ffff         | lea                 eax, [ebp - 0x824]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd7                 | call                edi

        $sequence_10 = { 498bce 418d5001 ffd3 488bc3 4883c440 415f 415e }
            // n = 7, score = 300
            //   498bce               | dec                 ecx
            //   418d5001             | mov                 ecx, esi
            //   ffd3                 | inc                 ecx
            //   488bc3               | lea                 edx, [eax + 1]
            //   4883c440             | call                ebx
            //   415f                 | dec                 eax
            //   415e                 | mov                 eax, ebx

        $sequence_11 = { 4883c9ff 4903de ff542468 4533c0 498bce 418d5001 ffd3 }
            // n = 7, score = 300
            //   4883c9ff             | dec                 eax
            //   4903de               | add                 esp, 0x40
            //   ff542468             | inc                 ecx
            //   4533c0               | pop                 edi
            //   498bce               | inc                 ecx
            //   418d5001             | pop                 esi
            //   ffd3                 | dec                 eax

        $sequence_12 = { 4156 4157 4883ec40 48896c2470 4889742438 }
            // n = 5, score = 300
            //   4156                 | dec                 ecx
            //   4157                 | mov                 ecx, esi
            //   4883ec40             | inc                 ecx
            //   48896c2470           | lea                 edx, [eax + 1]
            //   4889742438           | call                ebx

        $sequence_13 = { 4d8b36 4d85f6 0f8540feffff 488b6c2460 4c637d3c }
            // n = 5, score = 300
            //   4d8b36               | dec                 esp
            //   4d85f6               | mov                 dword ptr [esp + 0x68], edi
            //   0f8540feffff         | inc                 ecx
            //   488b6c2460           | mov                 ebx, 1
            //   4c637d3c             | inc                 ecx

        $sequence_14 = { 48896c2460 488b4818 41bb01000000 4c8b7120 4d85f6 0f84d6010000 }
            // n = 6, score = 300
            //   48896c2460           | lea                 ebx, [ebx + 2]
            //   488b4818             | dec                 ebp
            //   41bb01000000         | test                ebp, ebp
            //   4c8b7120             | je                  0x1e
            //   4d85f6               | dec                 ebp
            //   0f84d6010000         | test                esp, esp

        $sequence_15 = { 4c897c2468 41bb01000000 418d5b02 4d85ed 740f 4d85e4 }
            // n = 6, score = 300
            //   4c897c2468           | or                  ecx, 0xffffffff
            //   41bb01000000         | dec                 ecx
            //   418d5b02             | add                 ebx, esi
            //   4d85ed               | call                dword ptr [esp + 0x68]
            //   740f                 | inc                 ebp
            //   4d85e4               | xor                 eax, eax

        $sequence_16 = { 85c9 0f8494020000 89bda0000000 897d30 }
            // n = 4, score = 200
            //   85c9                 | mov                 dword ptr [esp + 0x38], esi
            //   0f8494020000         | dec                 ebp
            //   89bda0000000         | mov                 esi, dword ptr [esi]
            //   897d30               | dec                 ebp

        $sequence_17 = { e8???????? 90 83bd8000000000 7443 8b8584000000 85c0 750b }
            // n = 7, score = 200
            //   e8????????           |                     
            //   90                   | test                esi, esi
            //   83bd8000000000       | jne                 0xfffffe49
            //   7443                 | dec                 eax
            //   8b8584000000         | mov                 ebp, dword ptr [esp + 0x60]
            //   85c0                 | dec                 esp
            //   750b                 | arpl                word ptr [ebp + 0x3c], di

        $sequence_18 = { 0f84b3000000 85f6 0f8497000000 8bd6 }
            // n = 4, score = 200
            //   0f84b3000000         | inc                 ecx
            //   85f6                 | push                edi
            //   0f8497000000         | dec                 eax
            //   8bd6                 | sub                 esp, 0x40

        $sequence_19 = { ff15???????? 85c0 7464 c7453038000000 33c0 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   7464                 | mov                 dword ptr [esp + 0x60], ebp
            //   c7453038000000       | dec                 eax
            //   33c0                 | mov                 ecx, dword ptr [eax + 0x18]

        $sequence_20 = { e8???????? eb2e 83f801 750b }
            // n = 4, score = 200
            //   e8????????           |                     
            //   eb2e                 | dec                 eax
            //   83f801               | mov                 dword ptr [esp + 0x70], ebp
            //   750b                 | dec                 eax

        $sequence_21 = { 8d4702 03c2 89442450 8bf0 8bc8 e8???????? }
            // n = 6, score = 200
            //   8d4702               | je                  0x1e
            //   03c2                 | dec                 ebp
            //   89442450             | test                esp, esp
            //   8bf0                 | inc                 ecx
            //   8bc8                 | push                esi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 499712
}