rule win_ledgerchecker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.ledgerchecker."
        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.ledgerchecker"
        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 = { 488b4220 4883c008 4889442458 498b00 8b00 2bc1 89442450 }
            // n = 7, score = 100
            //   488b4220             | inc                 eax
            //   4883c008             | ret                 
            //   4889442458           | inc                 edx
            //   498b00               | movzx               edx, byte ptr [ecx]
            //   8b00                 | inc                 ebx
            //   2bc1                 | movzx               ecx, byte ptr [eax]
            //   89442450             | cmp                 ecx, edx

        $sequence_1 = { e8???????? 488bf0 4885c0 7472 0f57c0 33c0 b901000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488bf0               | dec                 eax
            //   4885c0               | mov                 esi, dword ptr [esp + 0x50]
            //   7472                 | dec                 esp
            //   0f57c0               | mov                 esi, dword ptr [esp + 0x60]
            //   33c0                 | dec                 eax
            //   b901000000           | mov                 ebp, dword ptr [esp + 0x38]

        $sequence_2 = { eb31 8b542434 8d4101 898790000000 488d0c49 488b8788000000 c704c88bfd0000 }
            // n = 7, score = 100
            //   eb31                 | mov                 dword ptr [esp - 0x28], edi
            //   8b542434             | dec                 ebp
            //   8d4101               | mov                 ecx, dword ptr [esp + 8]
            //   898790000000         | dec                 eax
            //   488d0c49             | mov                 edx, eax
            //   488b8788000000       | dec                 ecx
            //   c704c88bfd0000       | mov                 ecx, ebp

        $sequence_3 = { 8b8390000000 4863d2 890491 4883c468 415f 415e 415d }
            // n = 7, score = 100
            //   8b8390000000         | inc                 ebp
            //   4863d2               | mov                 edi, eax
            //   890491               | dec                 eax
            //   4883c468             | mov                 edi, edx
            //   415f                 | dec                 esp
            //   415e                 | mov                 esi, ecx
            //   415d                 | dec                 eax

        $sequence_4 = { e9???????? 488bcb ff15???????? 4c8b7c2430 488bd7 498bcd e8???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   488bcb               | dec                 eax
            //   ff15????????         |                     
            //   4c8b7c2430           | mov                 ebx, dword ptr [esp + 0x120]
            //   488bd7               | dec                 eax
            //   498bcd               | mov                 edi, dword ptr [esp + 0xd8]
            //   e8????????           |                     

        $sequence_5 = { 85c0 0f852a030000 f6433402 7410 488bcb e8???????? 85c0 }
            // n = 7, score = 100
            //   85c0                 | jg                  0xc5f
            //   0f852a030000         | inc                 esp
            //   f6433402             | mov                 ecx, edx
            //   7410                 | inc                 esp
            //   488bcb               | mov                 dword ptr [esp + 0x20], ebp
            //   e8????????           |                     
            //   85c0                 | mov                 edx, 0x48

        $sequence_6 = { 807b1100 0f8499000000 836b1401 744d 33ff e9???????? 0f4efd }
            // n = 7, score = 100
            //   807b1100             | mov                 eax, esi
            //   0f8499000000         | mov                 dword ptr [esp + 0x40], eax
            //   836b1401             | dec                 ecx
            //   744d                 | mov                 edx, esp
            //   33ff                 | dec                 eax
            //   e9????????           |                     
            //   0f4efd               | mov                 eax, dword ptr [ebp - 0x48]

        $sequence_7 = { c704c888000000 8954c804 44896cc808 896cc80c 48896cc810 e9???????? 488b7f10 }
            // n = 7, score = 100
            //   c704c888000000       | movzx               ecx, byte ptr [ecx + eax]
            //   8954c804             | dec                 eax
            //   44896cc808           | mov                 eax, dword ptr [esi + 0x40]
            //   896cc80c             | dec                 esp
            //   48896cc810           | mov                 ecx, ebp
            //   e9????????           |                     
            //   488b7f10             | dec                 eax

        $sequence_8 = { 891f 48894718 4a8d04ad00000000 4903c5 4c897f08 48c1e004 4883c020 }
            // n = 7, score = 100
            //   891f                 | movzx               ebx, byte ptr [ecx + 0xa]
            //   48894718             | dec                 esp
            //   4a8d04ad00000000     | mov                 ebp, ecx
            //   4903c5               | dec                 ebp
            //   4c897f08             | mov                 esi, ecx
            //   48c1e004             | dec                 ecx
            //   4883c020             | mov                 edi, eax

        $sequence_9 = { 83fd72 448b4328 8bd6 410f94c1 4889442420 498bce e8???????? }
            // n = 7, score = 100
            //   83fd72               | dec                 eax
            //   448b4328             | mov                 ebx, dword ptr [esp + 0x78]
            //   8bd6                 | dec                 esp
            //   410f94c1             | lea                 ebp, [0xfff670ce]
            //   4889442420           | dec                 eax
            //   498bce               | add                 ebx, 0x30
            //   e8????????           |                     

    condition:
        7 of them and filesize < 2333696
}