rule win_lightneuron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        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 = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 = { 81f9c8ce0000 742c 81f998d60000 7424 81f9aade0000 7c08 81f9b3de0000 }
            // n = 7, score = 100
            //   81f9c8ce0000         | mov                 dword ptr [edi + 0x28], 3
            //   742c                 | dec                 eax
            //   81f998d60000         | mov                 dword ptr [edi], ebp
            //   7424                 | jne                 0x1c50
            //   81f9aade0000         | dec                 eax
            //   7c08                 | mov                 ecx, dword ptr [esp + 0xcf0]
            //   81f9b3de0000         | inc                 ebp

        $sequence_1 = { 488b4c2468 4885c9 7406 ff15???????? 4c8d9c2420010000 8bc3 498b5b10 }
            // n = 7, score = 100
            //   488b4c2468           | cmovne              edx, eax
            //   4885c9               | dec                 eax
            //   7406                 | mov                 ecx, ebp
            //   ff15????????         |                     
            //   4c8d9c2420010000     | dec                 eax
            //   8bc3                 | mov                 dword ptr [esp + 0x58], ebx
            //   498b5b10             | dec                 eax

        $sequence_2 = { 4885c0 480f45d0 e8???????? 488bc8 4885c0 7423 488b05???????? }
            // n = 7, score = 100
            //   4885c0               | cmovne              edx, eax
            //   480f45d0             | dec                 eax
            //   e8????????           |                     
            //   488bc8               | test                eax, eax
            //   4885c0               | dec                 eax
            //   7423                 | test                eax, eax
            //   488b05????????       |                     

        $sequence_3 = { 0fb6842420010000 8844244c 837c245400 7d0f 8b442454 f7d8 89842424010000 }
            // n = 7, score = 100
            //   0fb6842420010000     | inc                 esp
            //   8844244c             | mov                 eax, ebp
            //   837c245400           | inc                 ecx
            //   7d0f                 | mov                 byte ptr [ebx + edi], 0
            //   8b442454             | dec                 eax
            //   f7d8                 | lea                 ecx, dword ptr [ebx + edi + 2]
            //   89842424010000       | dec                 eax

        $sequence_4 = { 8bc2 c1e818 0fb6c8 8bc2 c1ea08 458b848e80d10300 c1e810 }
            // n = 7, score = 100
            //   8bc2                 | dec                 eax
            //   c1e818               | add                 eax, 2
            //   0fb6c8               | dec                 eax
            //   8bc2                 | mov                 dword ptr [esp + 0x20], eax
            //   c1ea08               | jmp                 0x12ec
            //   458b848e80d10300     | mov                 eax, dword ptr [esp]
            //   c1e810               | mov                 dword ptr [esp], eax

        $sequence_5 = { 488d4c2440 ff15???????? 8bc8 4863d0 807c0c405c 7414 488d4c1440 }
            // n = 7, score = 100
            //   488d4c2440           | cmp                 eax, eax
            //   ff15????????         |                     
            //   8bc8                 | jb                  0x59b
            //   4863d0               | dec                 eax
            //   807c0c405c           | inc                 ecx
            //   7414                 | xor                 byte ptr [ecx - 1], al
            //   488d4c1440           | dec                 eax

        $sequence_6 = { 4889742410 57 4883ec20 33f6 bf100e0000 8935???????? 0f1f4000 }
            // n = 7, score = 100
            //   4889742410           | dec                 eax
            //   57                   | mov                 edi, dword ptr [esp + 0x60]
            //   4883ec20             | dec                 eax
            //   33f6                 | add                 esp, 0x28
            //   bf100e0000           | inc                 ecx
            //   8935????????         |                     
            //   0f1f4000             | pop                 ebp

        $sequence_7 = { 488bcb ff15???????? 488d15d8f9ffff 488d8c2450010000 4c63c0 4c8bcb 4c89442420 }
            // n = 7, score = 100
            //   488bcb               | je                  0x134e
            //   ff15????????         |                     
            //   488d15d8f9ffff       | dec                 eax
            //   488d8c2450010000     | mov                 ecx, dword ptr [eax + 8]
            //   4c63c0               | lea                 ecx, dword ptr [eax + 1]
            //   4c8bcb               | dec                 eax
            //   4c89442420           | mov                 edi, eax

        $sequence_8 = { 488bd9 80fa0d 7409 80fa0a 0f85a9000000 8b81a41f0000 85c0 }
            // n = 7, score = 100
            //   488bd9               | lea                 edx, dword ptr [esp + 0x64]
            //   80fa0d               | inc                 ecx
            //   7409                 | mov                 eax, 4
            //   80fa0a               | mov                 eax, ecx
            //   0f85a9000000         | mov                 byte ptr [esp + 0x64], cl
            //   8b81a41f0000         | shr                 eax, 8
            //   85c0                 | mov                 byte ptr [esp + 0x65], al

        $sequence_9 = { 4883ee01 75de 85ed 7454 4c3b642430 721e }
            // n = 6, score = 100
            //   4883ee01             | mov                 esi, eax
            //   75de                 | mov                 ebp, edx
            //   85ed                 | dec                 esp
            //   7454                 | mov                 esp, ecx
            //   4c3b642430           | mov                 ecx, 0x2c0
            //   721e                 | xor                 ebx, ebx

    condition:
        7 of them and filesize < 573440
}