rule win_maktub_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.maktub."
        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.maktub"
        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 = { ffd0 f7d8 1bc0 f7d8 8be5 }
            // n = 5, score = 400
            //   ffd0                 | call                eax
            //   f7d8                 | neg                 eax
            //   1bc0                 | sbb                 eax, eax
            //   f7d8                 | neg                 eax
            //   8be5                 | mov                 esp, ebp

        $sequence_1 = { ff15???????? eb02 33db 8b4df4 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   eb02                 | jmp                 4
            //   33db                 | xor                 ebx, ebx
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_2 = { ff15???????? eb0a 57 6a08 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   eb0a                 | jmp                 0xc
            //   57                   | push                edi
            //   6a08                 | push                8

        $sequence_3 = { ff15???????? f6c301 0f8414010000 8d46fc }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   f6c301               | test                bl, 1
            //   0f8414010000         | je                  0x11a
            //   8d46fc               | lea                 eax, [esi - 4]

        $sequence_4 = { ff15???????? ff75f8 ff15???????? 5f 5e b801000000 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   b801000000           | mov                 eax, 1

        $sequence_5 = { ff15???????? eb02 33c0 46 03f0 3b75e0 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   eb02                 | jmp                 4
            //   33c0                 | xor                 eax, eax
            //   46                   | inc                 esi
            //   03f0                 | add                 esi, eax
            //   3b75e0               | cmp                 esi, dword ptr [ebp - 0x20]

        $sequence_6 = { ff15???????? f6c301 7432 8b75b8 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   f6c301               | test                bl, 1
            //   7432                 | je                  0x34
            //   8b75b8               | mov                 esi, dword ptr [ebp - 0x48]

        $sequence_7 = { ff7508 ffd7 50 ffd6 53 }
            // n = 5, score = 300
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd7                 | call                edi
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   53                   | push                ebx

        $sequence_8 = { ff30 e8???????? 8bc7 5f 5e 5b }
            // n = 6, score = 200
            //   ff30                 | push                dword ptr [eax]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_9 = { 8d55e4 8d4dc4 e8???????? 8bc8 }
            // n = 4, score = 100
            //   8d55e4               | lea                 edx, [ebp - 0x1c]
            //   8d4dc4               | lea                 ecx, [ebp - 0x3c]
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax

        $sequence_10 = { 8d55e4 8d4dec e8???????? 8bce e8???????? 8b4df4 }
            // n = 6, score = 100
            //   8d55e4               | lea                 edx, [ebp - 0x1c]
            //   8d4dec               | lea                 ecx, [ebp - 0x14]
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_11 = { 8d4383 d1f1 10149d891be6fc ae }
            // n = 4, score = 100
            //   8d4383               | lea                 eax, [ebx - 0x7d]
            //   d1f1                 | sal                 ecx, 1
            //   10149d891be6fc       | adc                 byte ptr [ebx*4 - 0x319e477], dl
            //   ae                   | scasb               al, byte ptr es:[edi]

        $sequence_12 = { 8d55dc 8d8d5cffffff e8???????? 8bd0 }
            // n = 4, score = 100
            //   8d55dc               | lea                 edx, [ebp - 0x24]
            //   8d8d5cffffff         | lea                 ecx, [ebp - 0xa4]
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax

        $sequence_13 = { 8d433f e4f2 90 2ab432f35979e3 }
            // n = 4, score = 100
            //   8d433f               | lea                 eax, [ebx + 0x3f]
            //   e4f2                 | in                  al, 0xf2
            //   90                   | nop                 
            //   2ab432f35979e3       | sub                 dh, byte ptr [edx + esi - 0x1c86a60d]

        $sequence_14 = { 8d4310 50 e8???????? 8b7d10 }
            // n = 4, score = 100
            //   8d4310               | lea                 eax, [ebx + 0x10]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b7d10               | mov                 edi, dword ptr [ebp + 0x10]

        $sequence_15 = { 8d55e8 8bc8 e8???????? 8b4dfc }
            // n = 4, score = 100
            //   8d55e8               | lea                 edx, [ebp - 0x18]
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_16 = { 8d4320 57 50 e8???????? 83c40c c786f800000001000000 }
            // n = 6, score = 100
            //   8d4320               | lea                 eax, [ebx + 0x20]
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c786f800000001000000     | mov    dword ptr [esi + 0xf8], 1

        $sequence_17 = { 8d55e0 8d4d9c e8???????? 8bd0 8d4dcc e8???????? }
            // n = 6, score = 100
            //   8d55e0               | lea                 edx, [ebp - 0x20]
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   8d4dcc               | lea                 ecx, [ebp - 0x34]
            //   e8????????           |                     

        $sequence_18 = { 8d4320 50 ff7360 51 ff74242c }
            // n = 5, score = 100
            //   8d4320               | lea                 eax, [ebx + 0x20]
            //   50                   | push                eax
            //   ff7360               | push                dword ptr [ebx + 0x60]
            //   51                   | push                ecx
            //   ff74242c             | push                dword ptr [esp + 0x2c]

        $sequence_19 = { 8d55e4 8bc8 e8???????? 8b4df4 }
            // n = 4, score = 100
            //   8d55e4               | lea                 edx, [ebp - 0x1c]
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_20 = { 8d55ac 8d4d9c e8???????? 8bd0 8d8d74ffffff e8???????? }
            // n = 6, score = 100
            //   8d55ac               | lea                 edx, [ebp - 0x54]
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   8d8d74ffffff         | lea                 ecx, [ebp - 0x8c]
            //   e8????????           |                     

        $sequence_21 = { 8d43eb 83f804 0f8732030000 ff24850cd94300 }
            // n = 4, score = 100
            //   8d43eb               | lea                 eax, [ebx - 0x15]
            //   83f804               | cmp                 eax, 4
            //   0f8732030000         | ja                  0x338
            //   ff24850cd94300       | jmp                 dword ptr [eax*4 + 0x43d90c]

    condition:
        7 of them and filesize < 3063808
}