rule win_lightneuron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.lightneuron."
        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.lightneuron"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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???????? 8bd8 85c0 757b 4c8d87b8000000 488d542430 488d4c2448 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bd8                 | dec                 eax
            //   85c0                 | mov                 dword ptr [esp + 0x158], eax
            //   757b                 | mov                 dword ptr [esp + 0x140], ebx
            //   4c8d87b8000000       | test                eax, eax
            //   488d542430           | mov                 dword ptr [esp + 0x148], 1
            //   488d4c2448           | dec                 eax

        $sequence_1 = { f3c3 4885c9 0f84d2000000 48895c2408 57 4883ec20 0fb6fa }
            // n = 7, score = 100
            //   f3c3                 | mov                 esp, dword ptr [esp + 0x58]
            //   4885c9               | dec                 eax
            //   0f84d2000000         | mov                 edi, dword ptr [esp + 0x60]
            //   48895c2408           | dec                 eax
            //   57                   | mov                 ecx, edi
            //   4883ec20             | mov                 esi, eax
            //   0fb6fa               | lea                 ecx, [eax + 1]

        $sequence_2 = { 7815 488d8c24c8000000 4c8bc3 498bd5 e8???????? eb10 488d8c24c8000000 }
            // n = 7, score = 100
            //   7815                 | dec                 eax
            //   488d8c24c8000000     | sub                 ecx, 1
            //   4c8bc3               | jne                 0x1f6
            //   498bd5               | dec                 ecx
            //   e8????????           |                     
            //   eb10                 | mov                 eax, ebp
            //   488d8c24c8000000     | dec                 ebp

        $sequence_3 = { 4883c210 4881fa00040000 418b848ec0ed0300 42898432b0e50300 418b848ec0e90300 42898432b0e10300 418b848e80d90300 }
            // n = 7, score = 100
            //   4883c210             | dec                 ebp
            //   4881fa00040000       | mov                 esp, eax
            //   418b848ec0ed0300     | dec                 eax
            //   42898432b0e50300     | mov                 dword ptr [esp + 0x20], edi
            //   418b848ec0e90300     | inc                 ecx
            //   42898432b0e10300     | push                esp
            //   418b848e80d90300     | dec                 eax

        $sequence_4 = { 448b4b28 4183d200 450fb7c1 41c1e910 418bd1 418bc8 440fafce }
            // n = 7, score = 100
            //   448b4b28             | jge                 0x15b5
            //   4183d200             | dec                 eax
            //   450fb7c1             | mov                 ecx, dword ptr [esp + 0x58]
            //   41c1e910             | dec                 eax
            //   418bd1               | test                ecx, ecx
            //   418bc8               | je                  0x1584
            //   440fafce             | dec                 eax

        $sequence_5 = { 85c0 790a 488bcd e8???????? eb49 448b442460 488bd5 }
            // n = 7, score = 100
            //   85c0                 | sub                 ebx, 4
            //   790a                 | shl                 edx, 8
            //   488bcd               | or                  edx, eax
            //   e8????????           |                     
            //   eb49                 | movsx               eax, byte ptr [edi + 4]
            //   448b442460           | shl                 eax, 0x18
            //   488bd5               | shl                 edx, 8

        $sequence_6 = { 895c2420 ba94000000 448bc0 4533c9 b900001000 e8???????? b801000000 }
            // n = 7, score = 100
            //   895c2420             | inc                 esp
            //   ba94000000           | mov                 eax, dword ptr [edi + 0x8c]
            //   448bc0               | inc                 ebp
            //   4533c9               | xor                 ecx, ecx
            //   b900001000           | test                eax, eax
            //   e8????????           |                     
            //   b801000000           | jle                 0x159b

        $sequence_7 = { 89742420 e8???????? 4533c9 4533c0 8bd3 b991010000 4889742420 }
            // n = 7, score = 100
            //   89742420             | inc                 ecx
            //   e8????????           |                     
            //   4533c9               | cmove               eax, esp
            //   4533c0               | mov                 dword ptr [esp + 0x58], eax
            //   8bd3                 | mov                 dword ptr [esp + 0x68], eax
            //   b991010000           | test                ebx, ebx
            //   4889742420           | jne                 0x1d90

        $sequence_8 = { e9???????? 498bce ff15???????? 4533c9 4533c0 baaa000000 b900001000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   498bce               | mov                 dword ptr [esp + 0x28], esi
            //   ff15????????         |                     
            //   4533c9               | inc                 esp
            //   4533c0               | mov                 eax, dword ptr [edi + 0x8e8]
            //   baaa000000           | inc                 ebp
            //   b900001000           | xor                 ecx, ecx

        $sequence_9 = { 488b5c2468 4883c430 415d 415c 5e c3 803930 }
            // n = 7, score = 100
            //   488b5c2468           | mov                 eax, 0x10
            //   4883c430             | dec                 eax
            //   415d                 | lea                 edx, [0x1c9f7]
            //   415c                 | dec                 eax
            //   5e                   | mov                 ecx, esi
            //   c3                   | dec                 eax
            //   803930               | mov                 ecx, esi

    condition:
        7 of them and filesize < 573440
}