rule win_minitypeframe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.minitypeframe."
        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.minitypeframe"
        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 = { 56 50 55 e8???????? 83c410 85c0 0f84bcfeffff }
            // n = 7, score = 100
            //   56                   | push                esi
            //   50                   | push                eax
            //   55                   | push                ebp
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   0f84bcfeffff         | je                  0xfffffec2

        $sequence_1 = { 83c414 03f8 39aea0000000 742c 8d8424b8000000 85c0 7421 }
            // n = 7, score = 100
            //   83c414               | add                 esp, 0x14
            //   03f8                 | add                 edi, eax
            //   39aea0000000         | cmp                 dword ptr [esi + 0xa0], ebp
            //   742c                 | je                  0x2e
            //   8d8424b8000000       | lea                 eax, [esp + 0xb8]
            //   85c0                 | test                eax, eax
            //   7421                 | je                  0x23

        $sequence_2 = { 89742430 8a4601 8bd6 8a26 83c602 }
            // n = 5, score = 100
            //   89742430             | mov                 dword ptr [esp + 0x30], esi
            //   8a4601               | mov                 al, byte ptr [esi + 1]
            //   8bd6                 | mov                 edx, esi
            //   8a26                 | mov                 ah, byte ptr [esi]
            //   83c602               | add                 esi, 2

        $sequence_3 = { 8bca 55 83e103 f3a4 8b8304010000 8bcb 50 }
            // n = 7, score = 100
            //   8bca                 | mov                 ecx, edx
            //   55                   | push                ebp
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b8304010000         | mov                 eax, dword ptr [ebx + 0x104]
            //   8bcb                 | mov                 ecx, ebx
            //   50                   | push                eax

        $sequence_4 = { 33db 83c40c 3bf3 751d 6a74 68???????? 6a41 }
            // n = 7, score = 100
            //   33db                 | xor                 ebx, ebx
            //   83c40c               | add                 esp, 0xc
            //   3bf3                 | cmp                 esi, ebx
            //   751d                 | jne                 0x1f
            //   6a74                 | push                0x74
            //   68????????           |                     
            //   6a41                 | push                0x41

        $sequence_5 = { 7425 a9000000ff 740f c1e818 0fbe8058070810 83c018 eb2a }
            // n = 7, score = 100
            //   7425                 | je                  0x27
            //   a9000000ff           | test                eax, 0xff000000
            //   740f                 | je                  0x11
            //   c1e818               | shr                 eax, 0x18
            //   0fbe8058070810       | movsx               eax, byte ptr [eax + 0x10080758]
            //   83c018               | add                 eax, 0x18
            //   eb2a                 | jmp                 0x2c

        $sequence_6 = { 8be8 c744241c00000000 83fd30 0f8c59020000 8d8c24ac000000 }
            // n = 5, score = 100
            //   8be8                 | mov                 ebp, eax
            //   c744241c00000000     | mov                 dword ptr [esp + 0x1c], 0
            //   83fd30               | cmp                 ebp, 0x30
            //   0f8c59020000         | jl                  0x25f
            //   8d8c24ac000000       | lea                 ecx, [esp + 0xac]

        $sequence_7 = { 41 3d???????? 72f1 56 8bf1 c1e603 3b9670ba0910 }
            // n = 7, score = 100
            //   41                   | inc                 ecx
            //   3d????????           |                     
            //   72f1                 | jb                  0xfffffff3
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   c1e603               | shl                 esi, 3
            //   3b9670ba0910         | cmp                 edx, dword ptr [esi + 0x1009ba70]

        $sequence_8 = { 7e11 03f0 3bf7 7402 7ce2 8bc6 5f }
            // n = 7, score = 100
            //   7e11                 | jle                 0x13
            //   03f0                 | add                 esi, eax
            //   3bf7                 | cmp                 esi, edi
            //   7402                 | je                  4
            //   7ce2                 | jl                  0xffffffe4
            //   8bc6                 | mov                 eax, esi
            //   5f                   | pop                 edi

        $sequence_9 = { c744243844000000 c744246401000000 6689742468 e8???????? 8b442420 83c404 83f805 }
            // n = 7, score = 100
            //   c744243844000000     | mov                 dword ptr [esp + 0x38], 0x44
            //   c744246401000000     | mov                 dword ptr [esp + 0x64], 1
            //   6689742468           | mov                 word ptr [esp + 0x68], si
            //   e8????????           |                     
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   83c404               | add                 esp, 4
            //   83f805               | cmp                 eax, 5

    condition:
        7 of them and filesize < 1589248
}