rule win_curator_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.curator."
        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.curator"
        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 = { 4433d0 69c907536554 c1c107 4489542444 8b442448 89874c010000 }
            // n = 6, score = 200
            //   4433d0               | dec                 esp
            //   69c907536554         | mov                 eax, dword ptr [esp + 0x78]
            //   c1c107               | inc                 eax
            //   4489542444           | test                ch, 2
            //   8b442448             | je                  0x19f
            //   89874c010000         | and                 ebp, 0xfffffffd

        $sequence_1 = { 0fbaea08 eb04 0fbaea09 8bc2 4883c428 c3 48895c2408 }
            // n = 7, score = 200
            //   0fbaea08             | dec                 ecx
            //   eb04                 | mov                 eax, edi
            //   0fbaea09             | dec                 eax
            //   8bc2                 | mov                 eax, dword ptr [ebp + 0x140]
            //   4883c428             | dec                 eax
            //   c3                   | lea                 edx, [0x75347]
            //   48895c2408           | dec                 eax

        $sequence_2 = { c3 3c20 755c 410fb609 418b5048 83e10f 4a0fbe8419d0590600 }
            // n = 7, score = 200
            //   c3                   | lea                 esi, [edi + 4]
            //   3c20                 | test                ecx, ecx
            //   755c                 | jne                 0xf7f
            //   410fb609             | mov                 dword ptr [ebx + 8], edi
            //   418b5048             | test                eax, eax
            //   83e10f               | jne                 0xf6b
            //   4a0fbe8419d0590600     | lea    esi, [edi + 8]

        $sequence_3 = { 488b9108010000 488bb910010000 483bc2 480f42d0 488bc1 48f7d8 83e00f }
            // n = 7, score = 200
            //   488b9108010000       | lea                 edx, [ecx + 8]
            //   488bb910010000       | dec                 eax
            //   483bc2               | mov                 dword ptr [esp + 8], ebx
            //   480f42d0             | push                edi
            //   488bc1               | dec                 eax
            //   48f7d8               | sub                 esp, 0x20
            //   83e00f               | dec                 eax

        $sequence_4 = { e8???????? 4c8bc3 488bc8 e9???????? 488d05c6fb0300 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   4c8bc3               | ret                 
            //   488bc8               | dec                 eax
            //   e9????????           |                     
            //   488d05c6fb0300       | mov                 dword ptr [esp + 8], ebx

        $sequence_5 = { 4883ec20 488bd9 488bc2 488d0d954f0100 0f57c0 }
            // n = 5, score = 200
            //   4883ec20             | call                dword ptr [ecx + 0x98]
            //   488bd9               | jmp                 0x1a50
            //   488bc2               | dec                 eax
            //   488d0d954f0100       | lea                 eax, [0x57bed]
            //   0f57c0               | dec                 eax

        $sequence_6 = { 4885f6 75bf 488b4528 48894530 33c9 48894830 48894828 }
            // n = 7, score = 200
            //   4885f6               | mov                 eax, dword ptr [esp + 0x50]
            //   75bf                 | inc                 esp
            //   488b4528             | and                 ebx, ecx
            //   48894530             | inc                 ecx
            //   33c9                 | neg                 ebx
            //   48894830             | inc                 ebp
            //   48894828             | and                 ebx, edx

        $sequence_7 = { 4a8904c2 488b4608 ff00 41ffc6 4983c730 443b75e8 0f8cecfeffff }
            // n = 7, score = 200
            //   4a8904c2             | mov                 byte ptr [ecx + ebp], al
            //   488b4608             | dec                 ecx
            //   ff00                 | add                 ecx, esi
            //   41ffc6               | dec                 ecx
            //   4983c730             | cmp                 ecx, eax
            //   443b75e8             | dec                 ecx
            //   0f8cecfeffff         | mov                 ecx, edi

        $sequence_8 = { 90 8bc8 e8???????? 90 e8???????? 90 b902000000 }
            // n = 7, score = 200
            //   90                   | lea                 eax, [0x3cbc8]
            //   8bc8                 | mov                 dword ptr [ebp - 0x18], 0xd
            //   e8????????           |                     
            //   90                   | jmp                 0x1144
            //   e8????????           |                     
            //   90                   | mov                 ecx, dword ptr [esi + 4]
            //   b902000000           | mov                 dword ptr [edx + 0x28], ecx

        $sequence_9 = { f30f7f4560 c7452002000000 f0ff05???????? 488d0521110300 48894560 488d0506110300 }
            // n = 6, score = 200
            //   f30f7f4560           | mov                 dword ptr [eax + 0x10], ebp
            //   c7452002000000       | inc                 ecx
            //   f0ff05????????       |                     
            //   488d0521110300       | mov                 esp, 1
            //   48894560             | mov                 ebx, edx
            //   488d0506110300       | dec                 eax

    condition:
        7 of them and filesize < 1265664
}