rule win_lightneuron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-08-17"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lightneuron"
        malpedia_rule_date = "20200817"
        malpedia_hash = "8c895fd01eccb47a6225bcb1a3ba53cbb98644c5"
        malpedia_version = "20200817"
        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 / approach 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 = { 4533c0 488bd3 33c9 89742428 c744242001000000 ff15???????? 83c9ff }
            // n = 7, score = 100
            //   4533c0               | add                 edi, 4
            //   488bd3               | shl                 ebp, 8
            //   33c9                 | sub                 ebx, 4
            //   89742428             | mov                 edx, 0xd0
            //   c744242001000000     | or                  ebp, eax
            //   ff15????????         |                     
            //   83c9ff               | movsx               eax, byte ptr [edi - 4]

        $sequence_1 = { 498b06 c1e908 884806 498b06 8bca c1e910 }
            // n = 6, score = 100
            //   498b06               | test                ebx, ebx
            //   c1e908               | jne                 0xef9
            //   884806               | mov                 eax, dword ptr [esp + 0x1d8]
            //   498b06               | mov                 dword ptr [esp + 0xb8], eax
            //   8bca                 | dec                 eax
            //   c1e910               | mov                 eax, dword ptr [esp + 0x100]

        $sequence_2 = { 488bce 4885c0 480f45d0 ff15???????? 85c0 0f85bf000000 488d9ea81f0000 }
            // n = 7, score = 100
            //   488bce               | xor                 ecx, ecx
            //   4885c0               | inc                 ebp
            //   480f45d0             | xor                 eax, eax
            //   ff15????????         |                     
            //   85c0                 | mov                 edx, 0xbf
            //   0f85bf000000         | mov                 ecx, 0x100000
            //   488d9ea81f0000       | dec                 eax

        $sequence_3 = { 4885c0 0f84a6070000 488d96a81f0000 488bc8 ff15???????? 488b4f48 4885c9 }
            // n = 7, score = 100
            //   4885c0               | je                  0xba6
            //   0f84a6070000         | dec                 eax
            //   488d96a81f0000       | mov                 dword ptr [esp + 8], ebx
            //   488bc8               | push                edi
            //   ff15????????         |                     
            //   488b4f48             | dec                 eax
            //   4885c9               | sub                 esp, 0x20

        $sequence_4 = { 480f45d1 488bcb e8???????? 488d542440 41b801000000 488bcf e8???????? }
            // n = 7, score = 100
            //   480f45d1             | dec                 eax
            //   488bcb               | mov                 ecx, edi
            //   e8????????           |                     
            //   488d542440           | dec                 eax
            //   41b801000000         | test                eax, eax
            //   488bcf               | je                  0x73d
            //   e8????????           |                     

        $sequence_5 = { 2bde 8d4b01 e8???????? 488bf8 4885c0 0f84c5020000 448bc3 }
            // n = 7, score = 100
            //   2bde                 | mov                 eax, dword ptr [ebx]
            //   8d4b01               | inc                 esp
            //   e8????????           |                     
            //   488bf8               | cmp                 ecx, ecx
            //   4885c0               | inc                 ecx
            //   0f84c5020000         | adc                 eax, 0
            //   448bc3               | inc                 esp

        $sequence_6 = { 448b842490000000 eb21 8b542430 4863c6 488d0c40 458b44cf10 eb0f }
            // n = 7, score = 100
            //   448b842490000000     | dec                 eax
            //   eb21                 | lea                 ebp, [eax + esi + 0xe]
            //   8b542430             | dec                 eax
            //   4863c6               | test                ebp, ebp
            //   488d0c40             | je                  0xf1c
            //   458b44cf10           | sub                 esi, ebp
            //   eb0f                 | add                 esi, edi

        $sequence_7 = { 418d4940 4c897c2428 44897c2420 e8???????? 488d4c2460 e8???????? b803000000 }
            // n = 7, score = 100
            //   418d4940             | inc                 ecx
            //   4c897c2428           | mov                 ebx, eax
            //   44897c2420           | dec                 eax
            //   e8????????           |                     
            //   488d4c2460           | mov                 edi, edx
            //   e8????????           |                     
            //   b803000000           | dec                 esp

        $sequence_8 = { 4889742438 0f42e8 4885c9 7437 e8???????? 488bf0 }
            // n = 6, score = 100
            //   4889742438           | test                esi, esi
            //   0f42e8               | je                  0xe79
            //   4885c9               | dec                 esp
            //   7437                 | mov                 eax, edx
            //   e8????????           |                     
            //   488bf0               | dec                 ebx

        $sequence_9 = { c6441c3000 ff15???????? 33ff 448be0 8bf7 85c0 741d }
            // n = 7, score = 100
            //   c6441c3000           | cmp                 dword ptr [esp + 0xa0], edx
            //   ff15????????         |                     
            //   33ff                 | jge                 0x1a54
            //   448be0               | or                  eax, 0xffffffff
            //   8bf7                 | dec                 eax
            //   85c0                 | add                 esp, 0x58
            //   741d                 | inc                 ecx

    condition:
        7 of them and filesize < 573440
}