rule win_confucius_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.confucius."
        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.confucius"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 51 52 55 ffd7 85c0 7cb3 b920000000 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   52                   | push                edx
            //   55                   | push                ebp
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7cb3                 | jl                  0xffffffb5
            //   b920000000           | mov                 ecx, 0x20

        $sequence_1 = { 56 8b742408 57 8b06 8b887c850000 8b410c 85c0 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   8b742408             | mov                 esi, dword ptr [esp + 8]
            //   57                   | push                edi
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8b887c850000         | mov                 ecx, dword ptr [eax + 0x857c]
            //   8b410c               | mov                 eax, dword ptr [ecx + 0xc]
            //   85c0                 | test                eax, eax

        $sequence_2 = { 8d45d8 50 ff15???????? 8d45d8 50 ff15???????? 8d45d8 }
            // n = 7, score = 100
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d45d8               | lea                 eax, [ebp - 0x28]

        $sequence_3 = { 85f6 750a b9???????? e8???????? 33c0 668906 33db }
            // n = 7, score = 100
            //   85f6                 | test                esi, esi
            //   750a                 | jne                 0xc
            //   b9????????           |                     
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   668906               | mov                 word ptr [esi], ax
            //   33db                 | xor                 ebx, ebx

        $sequence_4 = { 88869c140000 e9???????? ff7570 ff15???????? 85c0 7515 895d70 }
            // n = 7, score = 100
            //   88869c140000         | mov                 byte ptr [esi + 0x149c], al
            //   e9????????           |                     
            //   ff7570               | push                dword ptr [ebp + 0x70]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7515                 | jne                 0x17
            //   895d70               | mov                 dword ptr [ebp + 0x70], ebx

        $sequence_5 = { 8d85fcfbffff 50 e8???????? 50 e8???????? 84c0 7571 }
            // n = 7, score = 100
            //   8d85fcfbffff         | lea                 eax, [ebp - 0x404]
            //   50                   | push                eax
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7571                 | jne                 0x73

        $sequence_6 = { 2bfb 51 8b08 57 52 68???????? 51 }
            // n = 7, score = 100
            //   2bfb                 | sub                 edi, ebx
            //   51                   | push                ecx
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   57                   | push                edi
            //   52                   | push                edx
            //   68????????           |                     
            //   51                   | push                ecx

        $sequence_7 = { 0f8434010000 8bfd 83c9ff f2ae f7d1 49 81f9ff000000 }
            // n = 7, score = 100
            //   0f8434010000         | je                  0x13a
            //   8bfd                 | mov                 edi, ebp
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   81f9ff000000         | cmp                 ecx, 0xff

        $sequence_8 = { 33d2 66891448 894f04 8d8dc8f3ffff e8???????? 5e 5b }
            // n = 7, score = 100
            //   33d2                 | xor                 edx, edx
            //   66891448             | mov                 word ptr [eax + ecx*2], dx
            //   894f04               | mov                 dword ptr [edi + 4], ecx
            //   8d8dc8f3ffff         | lea                 ecx, [ebp - 0xc38]
            //   e8????????           |                     
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_9 = { 53 8d4408f0 53 50 8d8dc8f3ffff e8???????? }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   8d4408f0             | lea                 eax, [eax + ecx - 0x10]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   8d8dc8f3ffff         | lea                 ecx, [ebp - 0xc38]
            //   e8????????           |                     

        $sequence_10 = { 83d000 89452c 8b44242c 8b4c2424 8b11 03d0 85ed }
            // n = 7, score = 100
            //   83d000               | adc                 eax, 0
            //   89452c               | mov                 dword ptr [ebp + 0x2c], eax
            //   8b44242c             | mov                 eax, dword ptr [esp + 0x2c]
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   03d0                 | add                 edx, eax
            //   85ed                 | test                ebp, ebp

        $sequence_11 = { 53 6a00 6aff 50 b301 e8???????? 83c40c }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   6a00                 | push                0
            //   6aff                 | push                -1
            //   50                   | push                eax
            //   b301                 | mov                 bl, 1
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_12 = { 50 ff7508 8bce e8???????? 83f8ff 7502 8bc7 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   7502                 | jne                 4
            //   8bc7                 | mov                 eax, edi

        $sequence_13 = { 57 ffd6 ff35???????? 6a66 57 ffd6 33c0 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   ff35????????         |                     
            //   6a66                 | push                0x66
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   33c0                 | xor                 eax, eax

        $sequence_14 = { 740d 8b07 6a00 50 e8???????? 83c408 8d8fb8020000 }
            // n = 7, score = 100
            //   740d                 | je                  0xf
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d8fb8020000         | lea                 ecx, [edi + 0x2b8]

        $sequence_15 = { 83c10e 50 51 e8???????? 89868c000000 8a8d51020000 83c40c }
            // n = 7, score = 100
            //   83c10e               | add                 ecx, 0xe
            //   50                   | push                eax
            //   51                   | push                ecx
            //   e8????????           |                     
            //   89868c000000         | mov                 dword ptr [esi + 0x8c], eax
            //   8a8d51020000         | mov                 cl, byte ptr [ebp + 0x251]
            //   83c40c               | add                 esp, 0xc

    condition:
        7 of them and filesize < 598016
}