rule win_maui_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.maui."
        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.maui"
        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 = { 68???????? e8???????? 8d8c241c040000 51 68???????? 56 e8???????? }
            // n = 7, score = 100
            //   68????????           |                     
            //   e8????????           |                     
            //   8d8c241c040000       | lea                 ecx, [esp + 0x41c]
            //   51                   | push                ecx
            //   68????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_1 = { f7de e8???????? 83c42c 85f6 7450 68d0000000 68???????? }
            // n = 7, score = 100
            //   f7de                 | neg                 esi
            //   e8????????           |                     
            //   83c42c               | add                 esp, 0x2c
            //   85f6                 | test                esi, esi
            //   7450                 | je                  0x52
            //   68d0000000           | push                0xd0
            //   68????????           |                     

        $sequence_2 = { 83c404 85c0 751f 68c2020000 68???????? 6a26 68a3000000 }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   751f                 | jne                 0x21
            //   68c2020000           | push                0x2c2
            //   68????????           |                     
            //   6a26                 | push                0x26
            //   68a3000000           | push                0xa3

        $sequence_3 = { 83f901 894c2414 7e70 55 8d4c2424 51 57 }
            // n = 7, score = 100
            //   83f901               | cmp                 ecx, 1
            //   894c2414             | mov                 dword ptr [esp + 0x14], ecx
            //   7e70                 | jle                 0x72
            //   55                   | push                ebp
            //   8d4c2424             | lea                 ecx, [esp + 0x24]
            //   51                   | push                ecx
            //   57                   | push                edi

        $sequence_4 = { 7cce eb2a 8b542428 8b7c2420 8b742434 52 8a542417 }
            // n = 7, score = 100
            //   7cce                 | jl                  0xffffffd0
            //   eb2a                 | jmp                 0x2c
            //   8b542428             | mov                 edx, dword ptr [esp + 0x28]
            //   8b7c2420             | mov                 edi, dword ptr [esp + 0x20]
            //   8b742434             | mov                 esi, dword ptr [esp + 0x34]
            //   52                   | push                edx
            //   8a542417             | mov                 dl, byte ptr [esp + 0x17]

        $sequence_5 = { 52 8b5314 8b5c2414 57 50 8b442434 52 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   8b5314               | mov                 edx, dword ptr [ebx + 0x14]
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   57                   | push                edi
            //   50                   | push                eax
            //   8b442434             | mov                 eax, dword ptr [esp + 0x34]
            //   52                   | push                edx

        $sequence_6 = { 8a06 0fb6d0 0fb71451 f6c208 753f 8bff 0fbee8 }
            // n = 7, score = 100
            //   8a06                 | mov                 al, byte ptr [esi]
            //   0fb6d0               | movzx               edx, al
            //   0fb71451             | movzx               edx, word ptr [ecx + edx*2]
            //   f6c208               | test                dl, 8
            //   753f                 | jne                 0x41
            //   8bff                 | mov                 edi, edi
            //   0fbee8               | movsx               ebp, al

        $sequence_7 = { e8???????? 83c414 85c0 7446 837e0400 7577 837c243400 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   85c0                 | test                eax, eax
            //   7446                 | je                  0x48
            //   837e0400             | cmp                 dword ptr [esi + 4], 0
            //   7577                 | jne                 0x79
            //   837c243400           | cmp                 dword ptr [esp + 0x34], 0

        $sequence_8 = { 0f84ee000000 8b542420 8b44240c 57 52 53 6a00 }
            // n = 7, score = 100
            //   0f84ee000000         | je                  0xf4
            //   8b542420             | mov                 edx, dword ptr [esp + 0x20]
            //   8b44240c             | mov                 eax, dword ptr [esp + 0xc]
            //   57                   | push                edi
            //   52                   | push                edx
            //   53                   | push                ebx
            //   6a00                 | push                0

        $sequence_9 = { 8bd9 57 8d7348 56 c744241800000000 e8???????? 40 }
            // n = 7, score = 100
            //   8bd9                 | mov                 ebx, ecx
            //   57                   | push                edi
            //   8d7348               | lea                 esi, [ebx + 0x48]
            //   56                   | push                esi
            //   c744241800000000     | mov                 dword ptr [esp + 0x18], 0
            //   e8????????           |                     
            //   40                   | inc                 eax

    condition:
        7 of them and filesize < 1616896
}