rule win_makloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.makloader."
        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.makloader"
        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 = { 7419 8b8d20e6ffff 51 e8???????? 83c404 b801000000 }
            // n = 6, score = 200
            //   7419                 | je                  0x1b
            //   8b8d20e6ffff         | mov                 ecx, dword ptr [ebp - 0x19e0]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   b801000000           | mov                 eax, 1

        $sequence_1 = { 55 8bec 8b4508 53 57 8d1c85e05f4200 8b03 }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   57                   | push                edi
            //   8d1c85e05f4200       | lea                 ebx, [eax*4 + 0x425fe0]
            //   8b03                 | mov                 eax, dword ptr [ebx]

        $sequence_2 = { 33d2 8b45fc 83c003 8810 8b45fc 8be5 }
            // n = 6, score = 200
            //   33d2                 | xor                 edx, edx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c003               | add                 eax, 3
            //   8810                 | mov                 byte ptr [eax], dl
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8be5                 | mov                 esp, ebp

        $sequence_3 = { 50 e8???????? 83c410 89856ce6ffff 8d956cfeffff 8995c4ebffff 0fb685eee5ffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   89856ce6ffff         | mov                 dword ptr [ebp - 0x1994], eax
            //   8d956cfeffff         | lea                 edx, [ebp - 0x194]
            //   8995c4ebffff         | mov                 dword ptr [ebp - 0x143c], edx
            //   0fb685eee5ffff       | movzx               eax, byte ptr [ebp - 0x1a12]

        $sequence_4 = { 50 8b95a4e5ffff 52 0fb685f6e5ffff 50 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   8b95a4e5ffff         | mov                 edx, dword ptr [ebp - 0x1a5c]
            //   52                   | push                edx
            //   0fb685f6e5ffff       | movzx               eax, byte ptr [ebp - 0x1a0a]
            //   50                   | push                eax

        $sequence_5 = { 52 68???????? 8d8d2ce9ffff e8???????? 8bc8 e8???????? }
            // n = 6, score = 200
            //   52                   | push                edx
            //   68????????           |                     
            //   8d8d2ce9ffff         | lea                 ecx, [ebp - 0x16d4]
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     

        $sequence_6 = { 6804010000 6a00 8d8de0fbffff 51 e8???????? 83c40c }
            // n = 6, score = 200
            //   6804010000           | push                0x104
            //   6a00                 | push                0
            //   8d8de0fbffff         | lea                 ecx, [ebp - 0x420]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_7 = { 8d8ddce9ffff e8???????? 8bc8 e8???????? }
            // n = 4, score = 200
            //   8d8ddce9ffff         | lea                 ecx, [ebp - 0x1624]
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     

        $sequence_8 = { 50 e8???????? 83c410 89856ce6ffff 83bd6ce6ffff00 0f848f010000 8b8528e6ffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   89856ce6ffff         | mov                 dword ptr [ebp - 0x1994], eax
            //   83bd6ce6ffff00       | cmp                 dword ptr [ebp - 0x1994], 0
            //   0f848f010000         | je                  0x195
            //   8b8528e6ffff         | mov                 eax, dword ptr [ebp - 0x19d8]

        $sequence_9 = { 6b45e430 8945e0 8d8000564200 8945e4 803800 8bc8 }
            // n = 6, score = 200
            //   6b45e430             | imul                eax, dword ptr [ebp - 0x1c], 0x30
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8d8000564200         | lea                 eax, [eax + 0x425600]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   803800               | cmp                 byte ptr [eax], 0
            //   8bc8                 | mov                 ecx, eax

    condition:
        7 of them and filesize < 335872
}