rule win_lightneuron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 4d85c0 741e 660f1f440000 488b03 8b17 0fb608 c1e208 }
            // n = 7, score = 100
            //   4d85c0               | pop                 edi
            //   741e                 | ret                 
            //   660f1f440000         | mov                 eax, dword ptr [esp + 0x20]
            //   488b03               | dec                 eax
            //   8b17                 | mov                 dword ptr [esp + 0x70], ebp
            //   0fb608               | dec                 eax
            //   c1e208               | mov                 dword ptr [esp + 0x78], esi

        $sequence_1 = { 48895c2420 4885c0 480f45c8 ff15???????? 488bd8 4885c0 750a }
            // n = 7, score = 100
            //   48895c2420           | mov                 ecx, dword ptr [ebx + 8]
            //   4885c0               | dec                 eax
            //   480f45c8             | mov                 ecx, ebx
            //   ff15????????         |                     
            //   488bd8               | inc                 ecx
            //   4885c0               | mov                 esp, 1
            //   750a                 | dec                 eax

        $sequence_2 = { e8???????? 8bc5 c1e803 4c8d5304 8d440006 898300020000 0fb64701 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bc5                 | xor                 edx, edx
            //   c1e803               | inc                 ecx
            //   4c8d5304             | mov                 eax, 0x100
            //   8d440006             | mov                 dword ptr [esp + 0x130], esi
            //   898300020000         | dec                 eax
            //   0fb64701             | lea                 ecx, dword ptr [esp + 0x140]

        $sequence_3 = { 4839842488000000 72b8 488b842480000000 4839842488000000 7336 488b8c2488000000 488b442430 }
            // n = 7, score = 100
            //   4839842488000000     | lea                 edi, dword ptr [ecx + eax]
            //   72b8                 | movzx               eax, byte ptr [ecx]
            //   488b842480000000     | dec                 eax
            //   4839842488000000     | inc                 ecx
            //   7336                 | dec                 eax
            //   488b8c2488000000     | mov                 dword ptr [ebx], ecx
            //   488b442430           | test                al, al

        $sequence_4 = { 33d2 b9ff000000 f7f1 8bc0 498d440001 483b442438 7607 }
            // n = 7, score = 100
            //   33d2                 | dec                 esp
            //   b9ff000000           | mov                 esp, dword ptr [esp + 0x98]
            //   f7f1                 | dec                 eax
            //   8bc0                 | lea                 edx, dword ptr [esp + 0x30]
            //   498d440001           | dec                 eax
            //   483b442438           | sub                 esi, ecx
            //   7607                 | dec                 eax

        $sequence_5 = { 4833d0 498bc0 4933c7 4923c6 4933c0 4803d0 498bc3 }
            // n = 7, score = 100
            //   4833d0               | dec                 eax
            //   498bc0               | mov                 eax, dword ptr [ebx + 0x30]
            //   4933c7               | dec                 eax
            //   4923c6               | lea                 edx, dword ptr [esp + 0x34]
            //   4933c0               | inc                 ecx
            //   4803d0               | mov                 eax, 4
            //   498bc3               | inc                 ecx

        $sequence_6 = { 448b842490000000 8b9c2490000000 4863c6 488d0c40 49833ccf00 0f84df000000 4863c3 }
            // n = 7, score = 100
            //   448b842490000000     | mov                 dword ptr [esp + 0x18], esi
            //   8b9c2490000000       | push                edi
            //   4863c6               | dec                 eax
            //   488d0c40             | sub                 esp, 0x350
            //   49833ccf00           | dec                 eax
            //   0f84df000000         | mov                 edi, ecx
            //   4863c3               | dec                 eax

        $sequence_7 = { 57 4883ec20 488b05???????? 488bf9 488b0d???????? 4885c0 488bda }
            // n = 7, score = 100
            //   57                   | dec                 eax
            //   4883ec20             | mov                 ecx, edi
            //   488b05????????       |                     
            //   488bf9               | dec                 eax
            //   488b0d????????       |                     
            //   4885c0               | mov                 ecx, esi
            //   488bda               | jb                  0xdb1

        $sequence_8 = { 33f6 8d4f01 e8???????? 488bd8 4885c0 0f848d000000 448bc7 }
            // n = 7, score = 100
            //   33f6                 | dec                 eax
            //   8d4f01               | cmp                 dword ptr [ecx + 0x118], eax
            //   e8????????           |                     
            //   488bd8               | jne                 0x18ba
            //   4885c0               | dec                 eax
            //   0f848d000000         | mov                 eax, dword ptr [esp + 0x30]
            //   448bc7               | dec                 eax

        $sequence_9 = { 7327 4533c9 4533c0 ba53010000 b900001000 }
            // n = 5, score = 100
            //   7327                 | mov                 ecx, dword ptr [esp + ecx*4 + 0x3ba70]
            //   4533c9               | inc                 ecx
            //   4533c0               | movzx               eax, bl
            //   ba53010000           | inc                 ebp
            //   b900001000           | xor                 esi, dword ptr [esp + eax*4 + 0x3c270]

    condition:
        7 of them and filesize < 573440
}