rule win_lightneuron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 8b4610 85c0 7405 3b4608 736e 4585c0 }
            // n = 6, score = 100
            //   8b4610               | mov                 eax, dword ptr [esp + 0x14]
            //   85c0                 | mov                 dword ptr [esp + 0xc], eax
            //   7405                 | mov                 eax, dword ptr [esp + 8]
            //   3b4608               | movzx               eax, byte ptr [esp + 0x10]
            //   736e                 | cmp                 eax, 0x3a
            //   4585c0               | jge                 0x1741

        $sequence_1 = { 4489742428 85ff 0f85fb020000 488d442420 488d9424c0000000 488d4c2428 897c2420 }
            // n = 7, score = 100
            //   4489742428           | mov                 edi, ecx
            //   85ff                 | dec                 eax
            //   0f85fb020000         | mov                 ecx, edx
            //   488d442420           | dec                 eax
            //   488d9424c0000000     | mov                 ebx, edx
            //   488d4c2428           | dec                 esp
            //   897c2420             | arpl                ax, bx

        $sequence_2 = { 41c1e108 48895c2420 418b9800020000 440bc8 0fb64103 48896c2428 }
            // n = 6, score = 100
            //   41c1e108             | dec                 ecx
            //   48895c2420           | mov                 ecx, ecx
            //   418b9800020000       | dec                 ecx
            //   440bc8               | mov                 dword ptr [ebx - 0x88], eax
            //   0fb64103             | dec                 eax
            //   48896c2428           | mov                 ebx, ecx

        $sequence_3 = { 488bda 4c8bc2 488bd6 488bcd e8???????? 48c744244800000000 85c0 }
            // n = 7, score = 100
            //   488bda               | je                  0x1073
            //   4c8bc2               | dec                 eax
            //   488bd6               | lea                 ecx, dword ptr [esp + 0x40]
            //   488bcd               | dec                 eax
            //   e8????????           |                     
            //   48c744244800000000     | mov    edx, esi
            //   85c0                 | mov                 edi, eax

        $sequence_4 = { 48897818 4c8960e8 33f6 4c8968e0 33ff 33ed 4c8970d8 }
            // n = 7, score = 100
            //   48897818             | mov                 esi, dword ptr [esp + 0x38]
            //   4c8960e8             | dec                 eax
            //   33f6                 | test                ecx, ecx
            //   4c8968e0             | je                  0x517
            //   33ff                 | dec                 eax
            //   33ed                 | mov                 dword ptr [ebx + 0x18], ebp
            //   4c8970d8             | dec                 eax

        $sequence_5 = { 7522 488b442460 4883c004 4889442460 488b842480000000 4883c004 4889842480000000 }
            // n = 7, score = 100
            //   7522                 | cmp                 dword ptr [edx], 0
            //   488b442460           | jne                 0xf87
            //   4883c004             | dec                 eax
            //   4889442460           | sub                 edx, 4
            //   488b842480000000     | dec                 eax
            //   4883c004             | sub                 eax, 1
            //   4889842480000000     | je                  0xf9b

        $sequence_6 = { b900001000 48896c2428 89442420 e8???????? 488bce ff15???????? 4533c9 }
            // n = 7, score = 100
            //   b900001000           | cmp                 dword ptr [esp + 0x20], eax
            //   48896c2428           | jae                 0x1ee6
            //   89442420             | mov                 ecx, dword ptr [esp + 0x20]
            //   e8????????           |                     
            //   488bce               | dec                 eax
            //   ff15????????         |                     
            //   4533c9               | mov                 eax, dword ptr [esp + 0x40]

        $sequence_7 = { 493bdd 7ced 49635cd708 498b14d7 488d4c2438 448bc3 e8???????? }
            // n = 7, score = 100
            //   493bdd               | mov                 ecx, ebx
            //   7ced                 | inc                 ebp
            //   49635cd708           | xor                 ecx, ecx
            //   498b14d7             | inc                 ebp
            //   488d4c2438           | xor                 eax, eax
            //   448bc3               | mov                 edx, 0xb0
            //   e8????????           |                     

        $sequence_8 = { 488b05???????? 4c8b05???????? 4885c0 4c0f45c0 ba00100000 488bcb }
            // n = 6, score = 100
            //   488b05????????       |                     
            //   4c8b05????????       |                     
            //   4885c0               | je                  0x487
            //   4c0f45c0             | dec                 ebp
            //   ba00100000           | mov                 ebp, dword ptr [edi + 8]
            //   488bcb               | dec                 ecx

        $sequence_9 = { 69c0b179379e c1e80e 8bc8 488b442428 891488 488b442460 8b00 }
            // n = 7, score = 100
            //   69c0b179379e         | mov                 ecx, edi
            //   c1e80e               | dec                 ebp
            //   8bc8                 | mov                 ebx, ebp
            //   488b442428           | dec                 esp
            //   891488               | mov                 esp, ebx
            //   488b442460           | dec                 esp
            //   8b00                 | lea                 esi, dword ptr [0x20709]

    condition:
        7 of them and filesize < 573440
}