rule win_newcore_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.newcore_rat"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 3d02010000 0f8519010000 8bff 8b8670300000 8b966c300000 8b8e68300000 }
            // n = 6, score = 100
            //   3d02010000           | cmp                 eax, 0x102
            //   0f8519010000         | jne                 0x11f
            //   8bff                 | mov                 edi, edi
            //   8b8670300000         | mov                 eax, dword ptr [esi + 0x3070]
            //   8b966c300000         | mov                 edx, dword ptr [esi + 0x306c]
            //   8b8e68300000         | mov                 ecx, dword ptr [esi + 0x3068]

        $sequence_1 = { 8b4d10 51 a3???????? 8b4514 6a32 68???????? 8915???????? }
            // n = 7, score = 100
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   51                   | push                ecx
            //   a3????????           |                     
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   6a32                 | push                0x32
            //   68????????           |                     
            //   8915????????         |                     

        $sequence_2 = { eb02 0430 83e10f 88445418 8bc1 83f809 }
            // n = 6, score = 100
            //   eb02                 | jmp                 4
            //   0430                 | add                 al, 0x30
            //   83e10f               | and                 ecx, 0xf
            //   88445418             | mov                 byte ptr [esp + edx*2 + 0x18], al
            //   8bc1                 | mov                 eax, ecx
            //   83f809               | cmp                 eax, 9

        $sequence_3 = { 751d 56 ff15???????? 33c0 5f 5e 8b8c2434010000 }
            // n = 7, score = 100
            //   751d                 | jne                 0x1f
            //   56                   | push                esi
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   8b8c2434010000       | mov                 ecx, dword ptr [esp + 0x134]

        $sequence_4 = { 8b8c247c080000 51 68???????? 8d542424 885c2424 895c2425 e8???????? }
            // n = 7, score = 100
            //   8b8c247c080000       | mov                 ecx, dword ptr [esp + 0x87c]
            //   51                   | push                ecx
            //   68????????           |                     
            //   8d542424             | lea                 edx, [esp + 0x24]
            //   885c2424             | mov                 byte ptr [esp + 0x24], bl
            //   895c2425             | mov                 dword ptr [esp + 0x25], ebx
            //   e8????????           |                     

        $sequence_5 = { 33c4 898424ac090000 53 8b9c24b8090000 55 56 }
            // n = 6, score = 100
            //   33c4                 | xor                 eax, esp
            //   898424ac090000       | mov                 dword ptr [esp + 0x9ac], eax
            //   53                   | push                ebx
            //   8b9c24b8090000       | mov                 ebx, dword ptr [esp + 0x9b8]
            //   55                   | push                ebp
            //   56                   | push                esi

        $sequence_6 = { 8bc1 83f809 7e04 0437 eb02 0430 0fb64c2428 }
            // n = 7, score = 100
            //   8bc1                 | mov                 eax, ecx
            //   83f809               | cmp                 eax, 9
            //   7e04                 | jle                 6
            //   0437                 | add                 al, 0x37
            //   eb02                 | jmp                 4
            //   0430                 | add                 al, 0x30
            //   0fb64c2428           | movzx               ecx, byte ptr [esp + 0x28]

        $sequence_7 = { 50 89442424 895c2420 c744243400000000 c744241c04000000 ff15???????? 85c0 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   89442424             | mov                 dword ptr [esp + 0x24], eax
            //   895c2420             | mov                 dword ptr [esp + 0x20], ebx
            //   c744243400000000     | mov                 dword ptr [esp + 0x34], 0
            //   c744241c04000000     | mov                 dword ptr [esp + 0x1c], 4
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_8 = { 8d442404 6a00 50 e8???????? 8b866c300000 8b965c300000 33c9 }
            // n = 7, score = 100
            //   8d442404             | lea                 eax, [esp + 4]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b866c300000         | mov                 eax, dword ptr [esi + 0x306c]
            //   8b965c300000         | mov                 edx, dword ptr [esi + 0x305c]
            //   33c9                 | xor                 ecx, ecx

        $sequence_9 = { 8bb42450020000 8bd8 8b442418 50 6a32 8d7b34 b904010000 }
            // n = 7, score = 100
            //   8bb42450020000       | mov                 esi, dword ptr [esp + 0x250]
            //   8bd8                 | mov                 ebx, eax
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   50                   | push                eax
            //   6a32                 | push                0x32
            //   8d7b34               | lea                 edi, [ebx + 0x34]
            //   b904010000           | mov                 ecx, 0x104

    condition:
        7 of them and filesize < 581632
}