rule win_dented_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.dented."
        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.dented"
        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 = { 8bf1 e8???????? 83c40c 89bd60ffffff 8d8560ffffff 50 ff15???????? }
            // n = 7, score = 400
            //   8bf1                 | mov                 esi, ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   89bd60ffffff         | mov                 dword ptr [ebp - 0xa0], edi
            //   8d8560ffffff         | lea                 eax, [ebp - 0xa0]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_1 = { 8a1c18 8d55ff a1???????? 52 885dff }
            // n = 5, score = 400
            //   8a1c18               | mov                 bl, byte ptr [eax + ebx]
            //   8d55ff               | lea                 edx, [ebp - 1]
            //   a1????????           |                     
            //   52                   | push                edx
            //   885dff               | mov                 byte ptr [ebp - 1], bl

        $sequence_2 = { 83c0ff 8945ec 8945c8 8b4de8 }
            // n = 4, score = 400
            //   83c0ff               | add                 eax, -1
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]

        $sequence_3 = { 5f 5e c703???????? 33cd 5b e8???????? 8be5 }
            // n = 7, score = 400
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   c703????????         |                     
            //   33cd                 | xor                 ecx, ebp
            //   5b                   | pop                 ebx
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp

        $sequence_4 = { c745f40f000000 50 8d4de0 895df0 885de0 e8???????? }
            // n = 6, score = 400
            //   c745f40f000000       | mov                 dword ptr [ebp - 0xc], 0xf
            //   50                   | push                eax
            //   8d4de0               | lea                 ecx, [ebp - 0x20]
            //   895df0               | mov                 dword ptr [ebp - 0x10], ebx
            //   885de0               | mov                 byte ptr [ebp - 0x20], bl
            //   e8????????           |                     

        $sequence_5 = { 2bf1 85f6 7e29 8b4508 53 8a18 }
            // n = 6, score = 400
            //   2bf1                 | sub                 esi, ecx
            //   85f6                 | test                esi, esi
            //   7e29                 | jle                 0x2b
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   8a18                 | mov                 bl, byte ptr [eax]

        $sequence_6 = { 8b7d08 33db 68???????? 53 53 }
            // n = 5, score = 400
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   33db                 | xor                 ebx, ebx
            //   68????????           |                     
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_7 = { 53 56 57 8bf1 8d4dac 50 e8???????? }
            // n = 7, score = 400
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8bf1                 | mov                 esi, ecx
            //   8d4dac               | lea                 ecx, [ebp - 0x54]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_8 = { 57 8d85f8feffff 50 6a01 6a04 ff15???????? }
            // n = 6, score = 400
            //   57                   | push                edi
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   6a01                 | push                1
            //   6a04                 | push                4
            //   ff15????????         |                     

        $sequence_9 = { 895df8 881e e8???????? 395df4 }
            // n = 4, score = 400
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   881e                 | mov                 byte ptr [esi], bl
            //   e8????????           |                     
            //   395df4               | cmp                 dword ptr [ebp - 0xc], ebx

    condition:
        7 of them and filesize < 450560
}