rule win_mikoponi_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.mikoponi."
        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.mikoponi"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 881d???????? 881d???????? eb54 6683f863 }
            // n = 4, score = 100
            //   881d????????         |                     
            //   881d????????         |                     
            //   eb54                 | jmp                 0x56
            //   6683f863             | cmp                 ax, 0x63

        $sequence_1 = { e8???????? 83c40c 84c0 7508 83c6ff }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   84c0                 | test                al, al
            //   7508                 | jne                 0xa
            //   83c6ff               | add                 esi, -1

        $sequence_2 = { 8d742448 e8???????? 8bce ba02000000 83c408 }
            // n = 5, score = 100
            //   8d742448             | lea                 esi, [esp + 0x48]
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   ba02000000           | mov                 edx, 2
            //   83c408               | add                 esp, 8

        $sequence_3 = { a3???????? 33c0 8945e4 83f805 7d10 668b4c4310 66890c45e0674200 }
            // n = 7, score = 100
            //   a3????????           |                     
            //   33c0                 | xor                 eax, eax
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   83f805               | cmp                 eax, 5
            //   7d10                 | jge                 0x12
            //   668b4c4310           | mov                 cx, word ptr [ebx + eax*2 + 0x10]
            //   66890c45e0674200     | mov                 word ptr [eax*2 + 0x4267e0], cx

        $sequence_4 = { 53 89442440 894c2444 ff15???????? 837c243c00 c744241800000000 0f862c010000 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   89442440             | mov                 dword ptr [esp + 0x40], eax
            //   894c2444             | mov                 dword ptr [esp + 0x44], ecx
            //   ff15????????         |                     
            //   837c243c00           | cmp                 dword ptr [esp + 0x3c], 0
            //   c744241800000000     | mov                 dword ptr [esp + 0x18], 0
            //   0f862c010000         | jbe                 0x132

        $sequence_5 = { 5e 8b8c2428060000 5f 5d 5b 33cc e8???????? }
            // n = 7, score = 100
            //   5e                   | pop                 esi
            //   8b8c2428060000       | mov                 ecx, dword ptr [esp + 0x628]
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   33cc                 | xor                 ecx, esp
            //   e8????????           |                     

        $sequence_6 = { 8d442424 50 ff15???????? 8d4c2444 }
            // n = 4, score = 100
            //   8d442424             | lea                 eax, [esp + 0x24]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d4c2444             | lea                 ecx, [esp + 0x44]

        $sequence_7 = { 33c0 e9???????? 8975e4 33c0 39b8f85a4200 0f8491000000 ff45e4 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   33c0                 | xor                 eax, eax
            //   39b8f85a4200         | cmp                 dword ptr [eax + 0x425af8], edi
            //   0f8491000000         | je                  0x97
            //   ff45e4               | inc                 dword ptr [ebp - 0x1c]

    condition:
        7 of them and filesize < 330752
}