rule win_kazuar_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.kazuar."
        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.kazuar"
        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 = { 5d 415c c3 4883ec48 }
            // n = 4, score = 300
            //   5d                   | mov                 dword ptr [esp + 0x3c], 0
            //   415c                 | dec                 eax
            //   c3                   | mov                 dword ptr [esp + 0x28], eax
            //   4883ec48             | mov                 dword ptr [esp + 0x20], 0

        $sequence_1 = { 4883ec28 e8???????? 31d2 4885c0 740e }
            // n = 5, score = 300
            //   4883ec28             | movzx               eax, word ptr [eax + edx]
            //   e8????????           |                     
            //   31d2                 | lea                 eax, [ebx + eax*4]
            //   4885c0               | add                 eax, dword ptr [edi + 0x1c]
            //   740e                 | mov                 edi, dword ptr [eax]

        $sequence_2 = { 8955e8 31f6 8b4718 8945f0 8b4720 01d8 8945ec }
            // n = 7, score = 300
            //   8955e8               | push                ebp
            //   31f6                 | mov                 ebp, esp
            //   8b4718               | push                edi
            //   8945f0               | push                esi
            //   8b4720               | push                ebx
            //   01d8                 | sub                 esp, 0xc
            //   8945ec               | test                eax, eax

        $sequence_3 = { 6689442430 4c8d442430 83c002 6689442432 48c744242800000000 }
            // n = 5, score = 300
            //   6689442430           | pop                 eax
            //   4c8d442430           | dec                 eax
            //   83c002               | add                 eax, 0x402000
            //   6689442432           | dec                 eax
            //   48c744242800000000     | add    esp, 0x48

        $sequence_4 = { 41ffc1 4131c0 4569c097010001 ebdc 4489c0 }
            // n = 5, score = 300
            //   41ffc1               | test                eax, eax
            //   4131c0               | jmp                 0x4d1
            //   4569c097010001       | mov                 eax, dword ptr [ebp - 0x24]
            //   ebdc                 | lea                 ecx, [ebp - 0x1c]
            //   4489c0               | mov                 dword ptr [ebp - 0x1c], 0

        $sequence_5 = { 7505 8b4308 eb0c 8b1b }
            // n = 4, score = 300
            //   7505                 | dec                 eax
            //   8b4308               | mov                 dword ptr [esp + 0x28], eax
            //   eb0c                 | dec                 edi
            //   8b1b                 | je                  0x20

        $sequence_6 = { 53 4883ec20 31db 65488b1c2530000000 }
            // n = 4, score = 300
            //   53                   | dec                 eax
            //   4883ec20             | mov                 edx, ebp
            //   31db                 | dec                 ecx
            //   65488b1c2530000000     | mov    ecx, edi

        $sequence_7 = { 5e 5f 5d 415c c3 4883ec48 }
            // n = 6, score = 300
            //   5e                   | mov                 ecx, eax
            //   5f                   | dec                 eax
            //   5d                   | inc                 ebx
            //   415c                 | jmp                 0xe3
            //   c3                   | xor                 eax, eax
            //   4883ec48             | dec                 eax

        $sequence_8 = { 4989db 498b4b40 e8???????? 3d88ae6393 7506 }
            // n = 5, score = 300
            //   4989db               | mov                 eax, ebx
            //   498b4b40             | pop                 ebx
            //   e8????????           |                     
            //   3d88ae6393           | xor                 eax, ebx
            //   7506                 | imul                ebx, eax, 0x1000197

        $sequence_9 = { 41ffc1 4131c0 4569c097010001 ebdd }
            // n = 4, score = 300
            //   41ffc1               | cmp                 eax, dword ptr [ebp - 0x18]
            //   4131c0               | jne                 0x79
            //   4569c097010001       | lea                 edx, [esi + esi]
            //   ebdd                 | add                 edx, ebx

    condition:
        7 of them and filesize < 81920
}