rule win_hellokitty_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { 0bc1 8b4dd4 03c6 8b75b0 03c2 8bd1 8945dc }
            // n = 7, score = 100
            //   0bc1                 | or                  eax, ecx
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   03c6                 | add                 eax, esi
            //   8b75b0               | mov                 esi, dword ptr [ebp - 0x50]
            //   03c2                 | add                 eax, edx
            //   8bd1                 | mov                 edx, ecx
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax

        $sequence_1 = { 894df8 894518 6a05 5a 47 81c6ffff0000 663bc2 }
            // n = 7, score = 100
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   894518               | mov                 dword ptr [ebp + 0x18], eax
            //   6a05                 | push                5
            //   5a                   | pop                 edx
            //   47                   | inc                 edi
            //   81c6ffff0000         | add                 esi, 0xffff
            //   663bc2               | cmp                 ax, dx

        $sequence_2 = { 8bc3 c1c007 33c8 895584 8bc3 8b5df0 8bf3 }
            // n = 7, score = 100
            //   8bc3                 | mov                 eax, ebx
            //   c1c007               | rol                 eax, 7
            //   33c8                 | xor                 ecx, eax
            //   895584               | mov                 dword ptr [ebp - 0x7c], edx
            //   8bc3                 | mov                 eax, ebx
            //   8b5df0               | mov                 ebx, dword ptr [ebp - 0x10]
            //   8bf3                 | mov                 esi, ebx

        $sequence_3 = { 8bc3 234de0 23fb c1c802 0bf9 }
            // n = 5, score = 100
            //   8bc3                 | mov                 eax, ebx
            //   234de0               | and                 ecx, dword ptr [ebp - 0x20]
            //   23fb                 | and                 edi, ebx
            //   c1c802               | ror                 eax, 2
            //   0bf9                 | or                  edi, ecx

        $sequence_4 = { c707???????? e8???????? 8bf0 85f6 7451 53 8b5e08 }
            // n = 7, score = 100
            //   c707????????         |                     
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   7451                 | je                  0x53
            //   53                   | push                ebx
            //   8b5e08               | mov                 ebx, dword ptr [esi + 8]

        $sequence_5 = { c1ca0d 33d0 8bc1 c1c802 33d0 8b45ec 8bc8 }
            // n = 7, score = 100
            //   c1ca0d               | ror                 edx, 0xd
            //   33d0                 | xor                 edx, eax
            //   8bc1                 | mov                 eax, ecx
            //   c1c802               | ror                 eax, 2
            //   33d0                 | xor                 edx, eax
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8bc8                 | mov                 ecx, eax

        $sequence_6 = { 03d1 c1cf02 8b4db4 03d3 334db8 8bc7 334dec }
            // n = 7, score = 100
            //   03d1                 | add                 edx, ecx
            //   c1cf02               | ror                 edi, 2
            //   8b4db4               | mov                 ecx, dword ptr [ebp - 0x4c]
            //   03d3                 | add                 edx, ebx
            //   334db8               | xor                 ecx, dword ptr [ebp - 0x48]
            //   8bc7                 | mov                 eax, edi
            //   334dec               | xor                 ecx, dword ptr [ebp - 0x14]

        $sequence_7 = { 8b4df4 0bd0 8b45c0 03c6 13ca 03c7 8945c0 }
            // n = 7, score = 100
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   0bd0                 | or                  edx, eax
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]
            //   03c6                 | add                 eax, esi
            //   13ca                 | adc                 ecx, edx
            //   03c7                 | add                 eax, edi
            //   8945c0               | mov                 dword ptr [ebp - 0x40], eax

        $sequence_8 = { c7461802000000 894608 897e0c e8???????? 84c0 0f8558ffffff 8b4c2410 }
            // n = 7, score = 100
            //   c7461802000000       | mov                 dword ptr [esi + 0x18], 2
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   897e0c               | mov                 dword ptr [esi + 0xc], edi
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   0f8558ffffff         | jne                 0xffffff5e
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]

        $sequence_9 = { e8???????? 8d4c2470 e8???????? 8d8c2488000000 e8???????? 8d4d08 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8d4c2470             | lea                 ecx, [esp + 0x70]
            //   e8????????           |                     
            //   8d8c2488000000       | lea                 ecx, [esp + 0x88]
            //   e8????????           |                     
            //   8d4d08               | lea                 ecx, [ebp + 8]

    condition:
        7 of them and filesize < 319488
}