rule win_maktub_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 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???????? f6c301 0f8414010000 8d46fc }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   f6c301               | test                bl, 1
            //   0f8414010000         | je                  0x11a
            //   8d46fc               | lea                 eax, [esi - 4]

        $sequence_3 = { ff15???????? e9???????? a1???????? 3bc1 0f8deefeffff 8bf0 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   e9????????           |                     
            //   a1????????           |                     
            //   3bc1                 | cmp                 eax, ecx
            //   0f8deefeffff         | jge                 0xfffffef4
            //   8bf0                 | mov                 esi, eax

        $sequence_4 = { ff15???????? eb02 33c0 46 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   eb02                 | jmp                 4
            //   33c0                 | xor                 eax, eax
            //   46                   | inc                 esi

        $sequence_5 = { ff15???????? eb0a 57 6a08 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   eb0a                 | jmp                 0xc
            //   57                   | push                edi
            //   6a08                 | push                8

        $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 = { 8d5005 e8???????? 8b45f8 8d4d08 }
            // n = 4, score = 100
            //   8d5005               | lea                 edx, [eax + 5]
            //   e8????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8d4d08               | lea                 ecx, [ebp + 8]

        $sequence_10 = { 8d429f 663b442418 7767 8d42a9 }
            // n = 4, score = 100
            //   8d429f               | lea                 eax, [edx - 0x61]
            //   663b442418           | cmp                 ax, word ptr [esp + 0x18]
            //   7767                 | ja                  0x69
            //   8d42a9               | lea                 eax, [edx - 0x57]

        $sequence_11 = { 8d55ac 8d4d9c e8???????? 8bd0 }
            // n = 4, score = 100
            //   8d55ac               | lea                 edx, [ebp - 0x54]
            //   8d4d9c               | lea                 ecx, [ebp - 0x64]
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax

        $sequence_12 = { 8d42a9 0fb7c0 43 0bc8 }
            // n = 4, score = 100
            //   8d42a9               | lea                 eax, [edx - 0x57]
            //   0fb7c0               | movzx               eax, ax
            //   43                   | inc                 ebx
            //   0bc8                 | or                  ecx, eax

        $sequence_13 = { 8d5590 85c0 7507 837a0401 }
            // n = 4, score = 100
            //   8d5590               | lea                 edx, [ebp - 0x70]
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   837a0401             | cmp                 dword ptr [edx + 4], 1

        $sequence_14 = { 8d42bf 663b442418 7705 8d42c9 }
            // n = 4, score = 100
            //   8d42bf               | lea                 eax, [edx - 0x41]
            //   663b442418           | cmp                 ax, word ptr [esp + 0x18]
            //   7705                 | ja                  7
            //   8d42c9               | lea                 eax, [edx - 0x37]

        $sequence_15 = { 8d42d0 663b442410 761c 8d42bf }
            // n = 4, score = 100
            //   8d42d0               | lea                 eax, [edx - 0x30]
            //   663b442410           | cmp                 ax, word ptr [esp + 0x10]
            //   761c                 | jbe                 0x1e
            //   8d42bf               | lea                 eax, [edx - 0x41]

        $sequence_16 = { 8d55ac 8d4d8c e8???????? 50 }
            // n = 4, score = 100
            //   8d55ac               | lea                 edx, [ebp - 0x54]
            //   8d4d8c               | lea                 ecx, [ebp - 0x74]
            //   e8????????           |                     
            //   50                   | push                eax

        $sequence_17 = { 8d4202 f30fe6c0 8901 f20f58c8 }
            // n = 4, score = 100
            //   8d4202               | lea                 eax, [edx + 2]
            //   f30fe6c0             | cvtdq2pd            xmm0, xmm0
            //   8901                 | mov                 dword ptr [ecx], eax
            //   f20f58c8             | addsd               xmm1, xmm0

        $sequence_18 = { 8d5001 8911 c20400 55 }
            // n = 4, score = 100
            //   8d5001               | lea                 edx, [eax + 1]
            //   8911                 | mov                 dword ptr [ecx], edx
            //   c20400               | ret                 4
            //   55                   | push                ebp

        $sequence_19 = { 8d4fff 03ca 8a041e 46 8801 }
            // n = 5, score = 100
            //   8d4fff               | lea                 ecx, [edi - 1]
            //   03ca                 | add                 ecx, edx
            //   8a041e               | mov                 al, byte ptr [esi + ebx]
            //   46                   | inc                 esi
            //   8801                 | mov                 byte ptr [ecx], al

        $sequence_20 = { 8d42c9 eb0d 8d429f 663b442418 }
            // n = 4, score = 100
            //   8d42c9               | lea                 eax, [edx - 0x37]
            //   eb0d                 | jmp                 0xf
            //   8d429f               | lea                 eax, [edx - 0x61]
            //   663b442418           | cmp                 ax, word ptr [esp + 0x18]

        $sequence_21 = { 8d5001 8955f0 8d4dd4 e8???????? }
            // n = 4, score = 100
            //   8d5001               | lea                 edx, [eax + 1]
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   8d4dd4               | lea                 ecx, [ebp - 0x2c]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 3063808
}