rule win_makadocs_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.makadocs."
        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.makadocs"
        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 = { 99 83c404 01442444 11542448 eb44 }
            // n = 5, score = 100
            //   99                   | cdq                 
            //   83c404               | add                 esp, 4
            //   01442444             | add                 dword ptr [esp + 0x44], eax
            //   11542448             | adc                 dword ptr [esp + 0x48], edx
            //   eb44                 | jmp                 0x46

        $sequence_1 = { c1f905 8d1c8d407c4200 8bf0 83e61f c1e606 8b0b 0fbe4c3104 }
            // n = 7, score = 100
            //   c1f905               | sar                 ecx, 5
            //   8d1c8d407c4200       | lea                 ebx, [ecx*4 + 0x427c40]
            //   8bf0                 | mov                 esi, eax
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   8b0b                 | mov                 ecx, dword ptr [ebx]
            //   0fbe4c3104           | movsx               ecx, byte ptr [ecx + esi + 4]

        $sequence_2 = { 50 ffd7 85c0 7508 8b4c2440 8b01 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7508                 | jne                 0xa
            //   8b4c2440             | mov                 ecx, dword ptr [esp + 0x40]
            //   8b01                 | mov                 eax, dword ptr [ecx]

        $sequence_3 = { 2bc2 8bf8 8b442410 56 e8???????? 85f6 7409 }
            // n = 7, score = 100
            //   2bc2                 | sub                 eax, edx
            //   8bf8                 | mov                 edi, eax
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   56                   | push                esi
            //   e8????????           |                     
            //   85f6                 | test                esi, esi
            //   7409                 | je                  0xb

        $sequence_4 = { 3bf1 0f8f06020000 03c6 68???????? 50 e8???????? 83c408 }
            // n = 7, score = 100
            //   3bf1                 | cmp                 esi, ecx
            //   0f8f06020000         | jg                  0x20c
            //   03c6                 | add                 eax, esi
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_5 = { 8b4c2424 51 50 8d4c2434 e8???????? 83c408 c644245402 }
            // n = 7, score = 100
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   8d4c2434             | lea                 ecx, [esp + 0x34]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   c644245402           | mov                 byte ptr [esp + 0x54], 2

        $sequence_6 = { c644246828 e8???????? 8b542434 52 68???????? 8d7c2430 e8???????? }
            // n = 7, score = 100
            //   c644246828           | mov                 byte ptr [esp + 0x68], 0x28
            //   e8????????           |                     
            //   8b542434             | mov                 edx, dword ptr [esp + 0x34]
            //   52                   | push                edx
            //   68????????           |                     
            //   8d7c2430             | lea                 edi, [esp + 0x30]
            //   e8????????           |                     

        $sequence_7 = { ffd5 8b06 3b78f8 7f0f 8978f4 8b0e c6040f00 }
            // n = 7, score = 100
            //   ffd5                 | call                ebp
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   3b78f8               | cmp                 edi, dword ptr [eax - 8]
            //   7f0f                 | jg                  0x11
            //   8978f4               | mov                 dword ptr [eax - 0xc], edi
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   c6040f00             | mov                 byte ptr [edi + ecx], 0

        $sequence_8 = { e8???????? c68424bc00000001 8b442444 83c0f0 83c404 8d500c 83c9ff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c68424bc00000001     | mov                 byte ptr [esp + 0xbc], 1
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   83c0f0               | add                 eax, -0x10
            //   83c404               | add                 esp, 4
            //   8d500c               | lea                 edx, [eax + 0xc]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_9 = { 68???????? e8???????? 8b4c2438 8b11 52 68???????? e8???????? }
            // n = 7, score = 100
            //   68????????           |                     
            //   e8????????           |                     
            //   8b4c2438             | mov                 ecx, dword ptr [esp + 0x38]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   52                   | push                edx
            //   68????????           |                     
            //   e8????????           |                     

    condition:
        7 of them and filesize < 344064
}