rule win_new_ct_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.new_ct"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 89b5ccebffff c685d0ebffff00 b9ff000000 33c0 8dbdd1ebffff f3ab 66ab }
            // n = 7, score = 100
            //   89b5ccebffff         | mov                 dword ptr [ebp - 0x1434], esi
            //   c685d0ebffff00       | mov                 byte ptr [ebp - 0x1430], 0
            //   b9ff000000           | mov                 ecx, 0xff
            //   33c0                 | xor                 eax, eax
            //   8dbdd1ebffff         | lea                 edi, [ebp - 0x142f]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax

        $sequence_1 = { 8bfb 8d9a80010000 f3a5 8bc8 33c0 83e103 }
            // n = 6, score = 100
            //   8bfb                 | mov                 edi, ebx
            //   8d9a80010000         | lea                 ebx, [edx + 0x180]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bc8                 | mov                 ecx, eax
            //   33c0                 | xor                 eax, eax
            //   83e103               | and                 ecx, 3

        $sequence_2 = { 43 3bdd f3a4 7caa 8d7c2450 83c9ff 33c0 }
            // n = 7, score = 100
            //   43                   | inc                 ebx
            //   3bdd                 | cmp                 ebx, ebp
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   7caa                 | jl                  0xffffffac
            //   8d7c2450             | lea                 edi, [esp + 0x50]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { f3ab 66ab aa b90f000000 33c0 8d7c2411 8bb42454040000 }
            // n = 7, score = 100
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   b90f000000           | mov                 ecx, 0xf
            //   33c0                 | xor                 eax, eax
            //   8d7c2411             | lea                 edi, [esp + 0x11]
            //   8bb42454040000       | mov                 esi, dword ptr [esp + 0x454]

        $sequence_4 = { 52 57 56 89ae80030000 ff15???????? 8bd0 3bd5 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   57                   | push                edi
            //   56                   | push                esi
            //   89ae80030000         | mov                 dword ptr [esi + 0x380], ebp
            //   ff15????????         |                     
            //   8bd0                 | mov                 edx, eax
            //   3bd5                 | cmp                 edx, ebp

        $sequence_5 = { 0f8ea4000000 8b8680030000 3bc3 0f8496000000 8b00 }
            // n = 5, score = 100
            //   0f8ea4000000         | jle                 0xaa
            //   8b8680030000         | mov                 eax, dword ptr [esi + 0x380]
            //   3bc3                 | cmp                 eax, ebx
            //   0f8496000000         | je                  0x9c
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_6 = { 33c0 8d4c2438 8944242c 8d542430 }
            // n = 4, score = 100
            //   33c0                 | xor                 eax, eax
            //   8d4c2438             | lea                 ecx, [esp + 0x38]
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax
            //   8d542430             | lea                 edx, [esp + 0x30]

        $sequence_7 = { 53 8b5c2408 53 c70300000000 e8???????? 83c404 }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   8b5c2408             | mov                 ebx, dword ptr [esp + 8]
            //   53                   | push                ebx
            //   c70300000000         | mov                 dword ptr [ebx], 0
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_8 = { 6a04 51 6801000098 52 c744242c01000000 c744242800000000 ff15???????? }
            // n = 7, score = 100
            //   6a04                 | push                4
            //   51                   | push                ecx
            //   6801000098           | push                0x98000001
            //   52                   | push                edx
            //   c744242c01000000     | mov                 dword ptr [esp + 0x2c], 1
            //   c744242800000000     | mov                 dword ptr [esp + 0x28], 0
            //   ff15????????         |                     

        $sequence_9 = { 8985ecefffff 6888030000 e8???????? 83c404 8985c4ebffff 85c0 7409 }
            // n = 7, score = 100
            //   8985ecefffff         | mov                 dword ptr [ebp - 0x1014], eax
            //   6888030000           | push                0x388
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8985c4ebffff         | mov                 dword ptr [ebp - 0x143c], eax
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb

    condition:
        7 of them and filesize < 122880
}