rule win_hellokitty_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.hellokitty."
        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.hellokitty"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 89b898000000 8bcf 334df0 894de8 89889c000000 0fb6c9 0fb689303b4200 }
            // n = 7, score = 100
            //   89b898000000         | mov                 dword ptr [eax + 0x98], edi
            //   8bcf                 | mov                 ecx, edi
            //   334df0               | xor                 ecx, dword ptr [ebp - 0x10]
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   89889c000000         | mov                 dword ptr [eax + 0x9c], ecx
            //   0fb6c9               | movzx               ecx, cl
            //   0fb689303b4200       | movzx               ecx, byte ptr [ecx + 0x423b30]

        $sequence_1 = { 33c8 03ca 8b55f8 03f1 8bc2 c1c007 8bca }
            // n = 7, score = 100
            //   33c8                 | xor                 ecx, eax
            //   03ca                 | add                 ecx, edx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   03f1                 | add                 esi, ecx
            //   8bc2                 | mov                 eax, edx
            //   c1c007               | rol                 eax, 7
            //   8bca                 | mov                 ecx, edx

        $sequence_2 = { 0f849b000000 391d???????? 0f848f000000 391d???????? 0f8483000000 6a42 8d45a8 }
            // n = 7, score = 100
            //   0f849b000000         | je                  0xa1
            //   391d????????         |                     
            //   0f848f000000         | je                  0x95
            //   391d????????         |                     
            //   0f8483000000         | je                  0x89
            //   6a42                 | push                0x42
            //   8d45a8               | lea                 eax, [ebp - 0x58]

        $sequence_3 = { 75ed 8b7510 8b5518 33ff 663bce 7324 }
            // n = 6, score = 100
            //   75ed                 | jne                 0xffffffef
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   8b5518               | mov                 edx, dword ptr [ebp + 0x18]
            //   33ff                 | xor                 edi, edi
            //   663bce               | cmp                 cx, si
            //   7324                 | jae                 0x26

        $sequence_4 = { 8945e4 33da 8b45a8 3345fc 8b55ac 33c2 335dc4 }
            // n = 7, score = 100
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   33da                 | xor                 ebx, edx
            //   8b45a8               | mov                 eax, dword ptr [ebp - 0x58]
            //   3345fc               | xor                 eax, dword ptr [ebp - 4]
            //   8b55ac               | mov                 edx, dword ptr [ebp - 0x54]
            //   33c2                 | xor                 eax, edx
            //   335dc4               | xor                 ebx, dword ptr [ebp - 0x3c]

        $sequence_5 = { 8975cc c1c90b 8bd6 0355b0 33c8 8bc3 8955cc }
            // n = 7, score = 100
            //   8975cc               | mov                 dword ptr [ebp - 0x34], esi
            //   c1c90b               | ror                 ecx, 0xb
            //   8bd6                 | mov                 edx, esi
            //   0355b0               | add                 edx, dword ptr [ebp - 0x50]
            //   33c8                 | xor                 ecx, eax
            //   8bc3                 | mov                 eax, ebx
            //   8955cc               | mov                 dword ptr [ebp - 0x34], edx

        $sequence_6 = { 33c9 8b75dc 33ff 895dfc 41 8b45d8 2bf0 }
            // n = 7, score = 100
            //   33c9                 | xor                 ecx, ecx
            //   8b75dc               | mov                 esi, dword ptr [ebp - 0x24]
            //   33ff                 | xor                 edi, edi
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   41                   | inc                 ecx
            //   8b45d8               | mov                 eax, dword ptr [ebp - 0x28]
            //   2bf0                 | sub                 esi, eax

        $sequence_7 = { 50 68???????? 51 51 ff15???????? 8945fc 8bcf }
            // n = 7, score = 100
            //   50                   | push                eax
            //   68????????           |                     
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_8 = { 83c404 85db 7512 0f1045d4 83c710 0f1106 }
            // n = 6, score = 100
            //   83c404               | add                 esp, 4
            //   85db                 | test                ebx, ebx
            //   7512                 | jne                 0x14
            //   0f1045d4             | movups              xmm0, xmmword ptr [ebp - 0x2c]
            //   83c710               | add                 edi, 0x10
            //   0f1106               | movups              xmmword ptr [esi], xmm0

        $sequence_9 = { 8b049d20364200 0fb6440828 83e001 7469 56 e8???????? 59 }
            // n = 7, score = 100
            //   8b049d20364200       | mov                 eax, dword ptr [ebx*4 + 0x423620]
            //   0fb6440828           | movzx               eax, byte ptr [eax + ecx + 0x28]
            //   83e001               | and                 eax, 1
            //   7469                 | je                  0x6b
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx

    condition:
        7 of them and filesize < 319488
}