rule win_kins_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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???????? 8d85ecfdffff 50 53 53 6a1a 53 }
            // n = 7, score = 5000
            //   e8????????           |                     
            //   8d85ecfdffff         | lea                 eax, [ebp - 0x214]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   6a1a                 | push                0x1a
            //   53                   | push                ebx

        $sequence_1 = { e9???????? 8bc3 99 83e207 03c2 c1f803 8d440006 }
            // n = 7, score = 5000
            //   e9????????           |                     
            //   8bc3                 | mov                 eax, ebx
            //   99                   | cdq                 
            //   83e207               | and                 edx, 7
            //   03c2                 | add                 eax, edx
            //   c1f803               | sar                 eax, 3
            //   8d440006             | lea                 eax, [eax + eax + 6]

        $sequence_2 = { 7424 33c0 393e 7e0b 8b4e0c }
            // n = 5, score = 5000
            //   7424                 | je                  0x26
            //   33c0                 | xor                 eax, eax
            //   393e                 | cmp                 dword ptr [esi], edi
            //   7e0b                 | jle                 0xd
            //   8b4e0c               | mov                 ecx, dword ptr [esi + 0xc]

        $sequence_3 = { 53 57 0fb67901 c1e208 0bd7 0fb67902 0fb65909 }
            // n = 7, score = 5000
            //   53                   | push                ebx
            //   57                   | push                edi
            //   0fb67901             | movzx               edi, byte ptr [ecx + 1]
            //   c1e208               | shl                 edx, 8
            //   0bd7                 | or                  edx, edi
            //   0fb67902             | movzx               edi, byte ptr [ecx + 2]
            //   0fb65909             | movzx               ebx, byte ptr [ecx + 9]

        $sequence_4 = { 8bf8 3bfe 0f85bd040000 8d542438 89742430 89742440 e8???????? }
            // n = 7, score = 5000
            //   8bf8                 | mov                 edi, eax
            //   3bfe                 | cmp                 edi, esi
            //   0f85bd040000         | jne                 0x4c3
            //   8d542438             | lea                 edx, [esp + 0x38]
            //   89742430             | mov                 dword ptr [esp + 0x30], esi
            //   89742440             | mov                 dword ptr [esp + 0x40], esi
            //   e8????????           |                     

        $sequence_5 = { 89442418 8b7510 3bf7 7417 8d442468 e8???????? }
            // n = 6, score = 5000
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   3bf7                 | cmp                 esi, edi
            //   7417                 | je                  0x19
            //   8d442468             | lea                 eax, [esp + 0x68]
            //   e8????????           |                     

        $sequence_6 = { 8d8ef0000000 8911 8b10 03cb 8911 03c3 8b10 }
            // n = 7, score = 5000
            //   8d8ef0000000         | lea                 ecx, [esi + 0xf0]
            //   8911                 | mov                 dword ptr [ecx], edx
            //   8b10                 | mov                 edx, dword ptr [eax]
            //   03cb                 | add                 ecx, ebx
            //   8911                 | mov                 dword ptr [ecx], edx
            //   03c3                 | add                 eax, ebx
            //   8b10                 | mov                 edx, dword ptr [eax]

        $sequence_7 = { c744180c01000000 89541808 e9???????? 6a02 59 390f 0f8593000000 }
            // n = 7, score = 5000
            //   c744180c01000000     | mov                 dword ptr [eax + ebx + 0xc], 1
            //   89541808             | mov                 dword ptr [eax + ebx + 8], edx
            //   e9????????           |                     
            //   6a02                 | push                2
            //   59                   | pop                 ecx
            //   390f                 | cmp                 dword ptr [edi], ecx
            //   0f8593000000         | jne                 0x99

        $sequence_8 = { 7d17 8b75e8 c1e604 0375f8 2b7de8 e8???????? }
            // n = 6, score = 5000
            //   7d17                 | jge                 0x19
            //   8b75e8               | mov                 esi, dword ptr [ebp - 0x18]
            //   c1e604               | shl                 esi, 4
            //   0375f8               | add                 esi, dword ptr [ebp - 8]
            //   2b7de8               | sub                 edi, dword ptr [ebp - 0x18]
            //   e8????????           |                     

        $sequence_9 = { e8???????? e9???????? 8d742418 e8???????? 3bc3 0f85a3000000 8b07 }
            // n = 7, score = 5000
            //   e8????????           |                     
            //   e9????????           |                     
            //   8d742418             | lea                 esi, [esp + 0x18]
            //   e8????????           |                     
            //   3bc3                 | cmp                 eax, ebx
            //   0f85a3000000         | jne                 0xa9
            //   8b07                 | mov                 eax, dword ptr [edi]

    condition:
        7 of them and filesize < 548864
}