rule win_kins_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.kins."
        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.kins"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 7462 834db620 830d????????10 8d4588 }
            // n = 4, score = 5000
            //   7462                 | je                  0x64
            //   834db620             | or                  dword ptr [ebp - 0x4a], 0x20
            //   830d????????10       |                     
            //   8d4588               | lea                 eax, [ebp - 0x78]

        $sequence_1 = { e8???????? eb03 6afd 58 8be5 5d c20800 }
            // n = 7, score = 5000
            //   e8????????           |                     
            //   eb03                 | jmp                 5
            //   6afd                 | push                -3
            //   58                   | pop                 eax
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8

        $sequence_2 = { f7f9 8bd8 8d442428 e8???????? 8b442424 99 8bcf }
            // n = 7, score = 5000
            //   f7f9                 | idiv                ecx
            //   8bd8                 | mov                 ebx, eax
            //   8d442428             | lea                 eax, [esp + 0x28]
            //   e8????????           |                     
            //   8b442424             | mov                 eax, dword ptr [esp + 0x24]
            //   99                   | cdq                 
            //   8bcf                 | mov                 ecx, edi

        $sequence_3 = { 8bd8 33f6 3bde 0f8532040000 8b7d0c 8d442448 e8???????? }
            // n = 7, score = 5000
            //   8bd8                 | mov                 ebx, eax
            //   33f6                 | xor                 esi, esi
            //   3bde                 | cmp                 ebx, esi
            //   0f8532040000         | jne                 0x438
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   8d442448             | lea                 eax, [esp + 0x48]
            //   e8????????           |                     

        $sequence_4 = { 33f6 3bfe 7508 6a10 58 }
            // n = 5, score = 5000
            //   33f6                 | xor                 esi, esi
            //   3bfe                 | cmp                 edi, esi
            //   7508                 | jne                 0xa
            //   6a10                 | push                0x10
            //   58                   | pop                 eax

        $sequence_5 = { 56 8b7508 85f6 7404 85c9 7508 6a10 }
            // n = 7, score = 5000
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   85f6                 | test                esi, esi
            //   7404                 | je                  6
            //   85c9                 | test                ecx, ecx
            //   7508                 | jne                 0xa
            //   6a10                 | push                0x10

        $sequence_6 = { 40 85c0 7e14 8bfa 8bc8 8db5e4f7ffff f3a5 }
            // n = 7, score = 5000
            //   40                   | inc                 eax
            //   85c0                 | test                eax, eax
            //   7e14                 | jle                 0x16
            //   8bfa                 | mov                 edi, edx
            //   8bc8                 | mov                 ecx, eax
            //   8db5e4f7ffff         | lea                 esi, [ebp - 0x81c]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]

        $sequence_7 = { 2bd9 8b4c241c 4e 8d7c81fc 33d2 48 }
            // n = 6, score = 5000
            //   2bd9                 | sub                 ebx, ecx
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]
            //   4e                   | dec                 esi
            //   8d7c81fc             | lea                 edi, [ecx + eax*4 - 4]
            //   33d2                 | xor                 edx, edx
            //   48                   | dec                 eax

        $sequence_8 = { 6685c0 75e3 eb04 c645ff01 52 e8???????? }
            // n = 6, score = 5000
            //   6685c0               | test                ax, ax
            //   75e3                 | jne                 0xffffffe5
            //   eb04                 | jmp                 6
            //   c645ff01             | mov                 byte ptr [ebp - 1], 1
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_9 = { 8b4df8 8b4508 8d1c88 8b13 c645ff00 8bca eb15 }
            // n = 7, score = 5000
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8d1c88               | lea                 ebx, [eax + ecx*4]
            //   8b13                 | mov                 edx, dword ptr [ebx]
            //   c645ff00             | mov                 byte ptr [ebp - 1], 0
            //   8bca                 | mov                 ecx, edx
            //   eb15                 | jmp                 0x17

    condition:
        7 of them and filesize < 548864
}