rule win_alpc_lpe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.alpc_lpe."
        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.alpc_lpe"
        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 = { e8???????? 85c0 740e 488d0d64d00000 e8???????? }
            // n = 5, score = 100
            //   e8????????           |                     
            //   85c0                 | lea                 ebp, [esp + 0x20]
            //   740e                 | dec                 eax
            //   488d0d64d00000       | mov                 edi, esp
            //   e8????????           |                     

        $sequence_1 = { 48c7400800000000 488d4d04 ff15???????? 488d4de0 488d15b2b50000 e8???????? 488b8df8000000 }
            // n = 7, score = 100
            //   48c7400800000000     | dec                 eax
            //   488d4d04             | lea                 ecx, [ebp - 0x30]
            //   ff15????????         |                     
            //   488d4de0             | dec                 eax
            //   488d15b2b50000       | lea                 edx, [0xb647]
            //   e8????????           |                     
            //   488b8df8000000       | dec                 eax

        $sequence_2 = { 48894c2408 4889542410 55 57 4883ec28 488d6a30 488d8d28020000 }
            // n = 7, score = 100
            //   48894c2408           | lea                 ecx, [0xf57f]
            //   4889542410           | dec                 eax
            //   55                   | mov                 eax, dword ptr [ebp + 0x28]
            //   57                   | dec                 eax
            //   4883ec28             | cmp                 dword ptr [ebp + 0x68], eax
            //   488d6a30             | inc                 ecx
            //   488d8d28020000       | mov                 ecx, 0x78

        $sequence_3 = { 48b8ffffffffffffff0f 48398568010000 7677 488d0577fa0000 4885c0 7406 33c0 }
            // n = 7, score = 100
            //   48b8ffffffffffffff0f     | nop    
            //   48398568010000       | inc                 ebp
            //   7677                 | test                esp, esp
            //   488d0577fa0000       | dec                 eax
            //   4885c0               | lea                 ecx, [0x9654]
            //   7406                 | dec                 eax
            //   33c0                 | mov                 dword ptr [eax], ecx

        $sequence_4 = { 761f 488b8d50010000 e8???????? 4c8b8560010000 488bd0 488b4d28 e8???????? }
            // n = 7, score = 100
            //   761f                 | dec                 eax
            //   488b8d50010000       | mov                 edx, eax
            //   e8????????           |                     
            //   4c8b8560010000       | dec                 eax
            //   488bd0               | lea                 ecx, [0xafde]
            //   488b4d28             | dec                 eax
            //   e8????????           |                     

        $sequence_5 = { e8???????? 488bbdc8000000 488bf0 b910000000 f3a4 488b85c8000000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   488bbdc8000000       | mov                 al, byte ptr [ecx + ebx + 0x1c]
            //   488bf0               | inc                 edx
            //   b910000000           | mov                 byte ptr [ecx + eax + 0xea90], al
            //   f3a4                 | inc                 edx
            //   488b85c8000000       | jmp                 0xa07

        $sequence_6 = { 488b8c2438010000 b801000000 4869c0e4030000 488d0df6a60000 4803c8 488bc1 488b8d18010000 }
            // n = 7, score = 100
            //   488b8c2438010000     | imul                eax, eax, 0xf6
            //   b801000000           | dec                 eax
            //   4869c0e4030000       | lea                 ecx, [0x9e96]
            //   488d0df6a60000       | dec                 eax
            //   4803c8               | add                 ecx, eax
            //   488bc1               | dec                 eax
            //   488b8d18010000       | mov                 eax, ecx

        $sequence_7 = { 4c8b8d08010000 4c8b8500010000 488bd0 488d0dd2ac0000 e8???????? 48894508 }
            // n = 6, score = 100
            //   4c8b8d08010000       | dec                 eax
            //   4c8b8500010000       | lea                 ecx, [0xf9c0]
            //   488bd0               | dec                 eax
            //   488d0dd2ac0000       | mov                 eax, dword ptr [ebp + 0x68]
            //   e8????????           |                     
            //   48894508             | dec                 eax

        $sequence_8 = { eb07 c685d400000000 41b937040000 4c8d0565b60000 488b9508010000 0fb68dd4000000 }
            // n = 6, score = 100
            //   eb07                 | mov                 eax, 1
            //   c685d400000000       | dec                 eax
            //   41b937040000         | imul                eax, eax, 0x2e2
            //   4c8d0565b60000       | dec                 eax
            //   488b9508010000       | lea                 ecx, [0xa0b6]
            //   0fb68dd4000000       | dec                 eax

        $sequence_9 = { 742b 488bcf e8???????? 483b3d???????? 741a 488d05b9b30000 483bf8 }
            // n = 7, score = 100
            //   742b                 | xor                 eax, eax
            //   488bcf               | dec                 eax
            //   e8????????           |                     
            //   483b3d????????       |                     
            //   741a                 | mov                 edi, esi
            //   488d05b9b30000       | repne scasb         al, byte ptr es:[edi]
            //   483bf8               | xor                 ecx, ecx

    condition:
        7 of them and filesize < 540672
}