rule win_cotx_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.cotx."
        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.cotx"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 8d85bcebffff 50 e8???????? 8d8dbcebffff }
            // n = 4, score = 500
            //   8d85bcebffff         | lea                 eax, [ebp - 0x1444]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d8dbcebffff         | lea                 ecx, [ebp - 0x1444]

        $sequence_1 = { c705????????2b3d0396 c705????????e54dcca2 c705????????92d61819 c705????????0c56aef3 }
            // n = 4, score = 500
            //   c705????????2b3d0396     |     
            //   c705????????e54dcca2     |     
            //   c705????????92d61819     |     
            //   c705????????0c56aef3     |     

        $sequence_2 = { c705????????79e66d38 c705????????ba66ea37 c705????????1671e665 c705????????6d8ddc0b }
            // n = 4, score = 500
            //   c705????????79e66d38     |     
            //   c705????????ba66ea37     |     
            //   c705????????1671e665     |     
            //   c705????????6d8ddc0b     |     

        $sequence_3 = { c705????????e54dcca2 c705????????92d61819 c705????????0c56aef3 c705????????c8a4ea05 }
            // n = 4, score = 500
            //   c705????????e54dcca2     |     
            //   c705????????92d61819     |     
            //   c705????????0c56aef3     |     
            //   c705????????c8a4ea05     |     

        $sequence_4 = { c705????????c4b85363 c705????????3abf261f c705????????890e9944 c705????????dbd99823 c705????????d468bcb5 c705????????a1a14538 }
            // n = 6, score = 500
            //   c705????????c4b85363     |     
            //   c705????????3abf261f     |     
            //   c705????????890e9944     |     
            //   c705????????dbd99823     |     
            //   c705????????d468bcb5     |     
            //   c705????????a1a14538     |     

        $sequence_5 = { f3a4 50 0f1185a8faffff e8???????? }
            // n = 4, score = 500
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   50                   | push                eax
            //   0f1185a8faffff       | movups              xmmword ptr [ebp - 0x558], xmm0
            //   e8????????           |                     

        $sequence_6 = { 75f8 0f2805???????? 8d85bdfaffff 8bca c785b8faffff39313044 }
            // n = 5, score = 500
            //   75f8                 | jne                 0xfffffffa
            //   0f2805????????       |                     
            //   8d85bdfaffff         | lea                 eax, [ebp - 0x543]
            //   8bca                 | mov                 ecx, edx
            //   c785b8faffff39313044     | mov    dword ptr [ebp - 0x548], 0x44303139

        $sequence_7 = { 6a00 50 68???????? ff15???????? 8b0d???????? }
            // n = 5, score = 500
            //   6a00                 | push                0
            //   50                   | push                eax
            //   68????????           |                     
            //   ff15????????         |                     
            //   8b0d????????         |                     

        $sequence_8 = { c705????????d468bcb5 c705????????a1a14538 c705????????2086e659 c705????????eec45abf }
            // n = 4, score = 500
            //   c705????????d468bcb5     |     
            //   c705????????a1a14538     |     
            //   c705????????2086e659     |     
            //   c705????????eec45abf     |     

        $sequence_9 = { 8975e0 e8???????? b906010200 85c0 }
            // n = 4, score = 500
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   e8????????           |                     
            //   b906010200           | mov                 ecx, 0x20106
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 1171456
}