rule win_kimsuky_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.kimsuky"
        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 = { ffd7 a3???????? 8d85d4f5ffff 50 }
            // n = 4, score = 200
            //   ffd7                 | call                edi
            //   a3????????           |                     
            //   8d85d4f5ffff         | lea                 eax, [ebp - 0xa2c]
            //   50                   | push                eax

        $sequence_1 = { 807c01ff2f 7505 c644242000 33ff }
            // n = 4, score = 200
            //   807c01ff2f           | cmp                 byte ptr [ecx + eax - 1], 0x2f
            //   7505                 | jne                 7
            //   c644242000           | mov                 byte ptr [esp + 0x20], 0
            //   33ff                 | xor                 edi, edi

        $sequence_2 = { 750a bffeffffff e9???????? 3dfafe0000 0f8217010000 83bbc0af060000 0f840a010000 }
            // n = 7, score = 200
            //   750a                 | jne                 0xc
            //   bffeffffff           | mov                 edi, 0xfffffffe
            //   e9????????           |                     
            //   3dfafe0000           | cmp                 eax, 0xfefa
            //   0f8217010000         | jb                  0x11d
            //   83bbc0af060000       | cmp                 dword ptr [ebx + 0x6afc0], 0
            //   0f840a010000         | je                  0x110

        $sequence_3 = { b9???????? e8???????? 8d95e4f9ffff b9???????? e8???????? }
            // n = 5, score = 200
            //   b9????????           |                     
            //   e8????????           |                     
            //   8d95e4f9ffff         | lea                 edx, [ebp - 0x61c]
            //   b9????????           |                     
            //   e8????????           |                     

        $sequence_4 = { 8bd6 b130 e8???????? 837c245800 8b7c2444 7470 85ff }
            // n = 7, score = 200
            //   8bd6                 | mov                 edx, esi
            //   b130                 | mov                 cl, 0x30
            //   e8????????           |                     
            //   837c245800           | cmp                 dword ptr [esp + 0x58], 0
            //   8b7c2444             | mov                 edi, dword ptr [esp + 0x44]
            //   7470                 | je                  0x72
            //   85ff                 | test                edi, edi

        $sequence_5 = { 6a00 6a00 e8???????? 83c418 50 ff15???????? 8b4dfc }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_6 = { ffc9 0f84fe070000 ffc9 0f84ee070000 ffc9 }
            // n = 5, score = 200
            //   ffc9                 | dec                 ecx
            //   0f84fe070000         | je                  0x804
            //   ffc9                 | dec                 ecx
            //   0f84ee070000         | je                  0x7f4
            //   ffc9                 | dec                 ecx

        $sequence_7 = { 740b 83c820 894718 e9???????? 83c801 894718 }
            // n = 6, score = 200
            //   740b                 | je                  0xd
            //   83c820               | or                  eax, 0x20
            //   894718               | mov                 dword ptr [edi + 0x18], eax
            //   e9????????           |                     
            //   83c801               | or                  eax, 1
            //   894718               | mov                 dword ptr [edi + 0x18], eax

        $sequence_8 = { 0f284890 0f294a90 0f2840a0 0f2942a0 }
            // n = 4, score = 200
            //   0f284890             | movaps              xmm1, xmmword ptr [eax - 0x70]
            //   0f294a90             | movaps              xmmword ptr [edx - 0x70], xmm1
            //   0f2840a0             | movaps              xmm0, xmmword ptr [eax - 0x60]
            //   0f2942a0             | movaps              xmmword ptr [edx - 0x60], xmm0

        $sequence_9 = { 8d4fff 8d53ff 03c8 03d0 3bd9 7704 }
            // n = 6, score = 200
            //   8d4fff               | lea                 ecx, [edi - 1]
            //   8d53ff               | lea                 edx, [ebx - 1]
            //   03c8                 | add                 ecx, eax
            //   03d0                 | add                 edx, eax
            //   3bd9                 | cmp                 ebx, ecx
            //   7704                 | ja                  6

        $sequence_10 = { 50 8d85f8feffff 6804010000 50 e8???????? 83c418 8d85f8feffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   6804010000           | push                0x104
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]

        $sequence_11 = { 740a 33ff ff15???????? eb06 }
            // n = 4, score = 200
            //   740a                 | je                  0xc
            //   33ff                 | xor                 edi, edi
            //   ff15????????         |                     
            //   eb06                 | jmp                 8

        $sequence_12 = { 8b442430 e9???????? c7431400000001 33c0 e9???????? }
            // n = 5, score = 200
            //   8b442430             | mov                 eax, dword ptr [esp + 0x30]
            //   e9????????           |                     
            //   c7431400000001       | mov                 dword ptr [ebx + 0x14], 0x1000000
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     

        $sequence_13 = { 8d85dcf7ffff 50 53 ffd7 a3???????? }
            // n = 5, score = 200
            //   8d85dcf7ffff         | lea                 eax, [ebp - 0x824]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd7                 | call                edi
            //   a3????????           |                     

        $sequence_14 = { 6a00 6800f70484 6a00 6a00 68???????? 8d85e4fbffff 50 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6800f70484           | push                0x8404f700
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   8d85e4fbffff         | lea                 eax, [ebp - 0x41c]
            //   50                   | push                eax

        $sequence_15 = { c705????????00000800 eb2f c705????????00000100 eb23 ff15???????? }
            // n = 5, score = 200
            //   c705????????00000800     |     
            //   eb2f                 | jmp                 0x31
            //   c705????????00000100     |     
            //   eb23                 | jmp                 0x25
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 499712
}