rule win_mimic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.mimic."
        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.mimic"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 0fb6c1 33148508ee5b00 8bc7 c1e810 33d3 0fb6c8 33de }
            // n = 7, score = 100
            //   0fb6c1               | movzx               eax, cl
            //   33148508ee5b00       | xor                 edx, dword ptr [eax*4 + 0x5bee08]
            //   8bc7                 | mov                 eax, edi
            //   c1e810               | shr                 eax, 0x10
            //   33d3                 | xor                 edx, ebx
            //   0fb6c8               | movzx               ecx, al
            //   33de                 | xor                 ebx, esi

        $sequence_1 = { 7429 83e804 83f86c 77e8 0fb680147a4d00 ff24850c7a4d00 2d86000000 }
            // n = 7, score = 100
            //   7429                 | je                  0x2b
            //   83e804               | sub                 eax, 4
            //   83f86c               | cmp                 eax, 0x6c
            //   77e8                 | ja                  0xffffffea
            //   0fb680147a4d00       | movzx               eax, byte ptr [eax + 0x4d7a14]
            //   ff24850c7a4d00       | jmp                 dword ptr [eax*4 + 0x4d7a0c]
            //   2d86000000           | sub                 eax, 0x86

        $sequence_2 = { 83ec14 8b4518 8b5508 53 8bd9 8945f0 }
            // n = 6, score = 100
            //   83ec14               | sub                 esp, 0x14
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   8bd9                 | mov                 ebx, ecx
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax

        $sequence_3 = { 53 56 57 8d442414 c744241400000000 50 51 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d442414             | lea                 eax, [esp + 0x14]
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   50                   | push                eax
            //   51                   | push                ecx

        $sequence_4 = { 0f84c1010000 8b45ec 33c9 3b45e0 0f85b3010000 3b4de4 0f85aa010000 }
            // n = 7, score = 100
            //   0f84c1010000         | je                  0x1c7
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   33c9                 | xor                 ecx, ecx
            //   3b45e0               | cmp                 eax, dword ptr [ebp - 0x20]
            //   0f85b3010000         | jne                 0x1b9
            //   3b4de4               | cmp                 ecx, dword ptr [ebp - 0x1c]
            //   0f85aa010000         | jne                 0x1b0

        $sequence_5 = { 8975dc c745e400000000 837f1410 8b5f10 7202 8b3f e8???????? }
            // n = 7, score = 100
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi
            //   c745e400000000       | mov                 dword ptr [ebp - 0x1c], 0
            //   837f1410             | cmp                 dword ptr [edi + 0x14], 0x10
            //   8b5f10               | mov                 ebx, dword ptr [edi + 0x10]
            //   7202                 | jb                  4
            //   8b3f                 | mov                 edi, dword ptr [edi]
            //   e8????????           |                     

        $sequence_6 = { c70700000000 b801000000 e9???????? ff15???????? 50 68???????? }
            // n = 6, score = 100
            //   c70700000000         | mov                 dword ptr [edi], 0
            //   b801000000           | mov                 eax, 1
            //   e9????????           |                     
            //   ff15????????         |                     
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_7 = { 0f8483000000 eb7d 8b1c9de8a75c00 6800080000 6a00 53 ff15???????? }
            // n = 7, score = 100
            //   0f8483000000         | je                  0x89
            //   eb7d                 | jmp                 0x7f
            //   8b1c9de8a75c00       | mov                 ebx, dword ptr [ebx*4 + 0x5ca7e8]
            //   6800080000           | push                0x800
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   ff15????????         |                     

        $sequence_8 = { 50 6a00 ff75ec 0f1145dc ff15???????? 85c0 0f8878ffffff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   0f1145dc             | movups              xmmword ptr [ebp - 0x24], xmm0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f8878ffffff         | js                  0xffffff7e

        $sequence_9 = { 663930 75f2 85c0 7523 3bd7 7405 83ea02 }
            // n = 7, score = 100
            //   663930               | cmp                 word ptr [eax], si
            //   75f2                 | jne                 0xfffffff4
            //   85c0                 | test                eax, eax
            //   7523                 | jne                 0x25
            //   3bd7                 | cmp                 edx, edi
            //   7405                 | je                  7
            //   83ea02               | sub                 edx, 2

    condition:
        7 of them and filesize < 4204544
}