rule win_moker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.moker."
        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.moker"
        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 = { 0302 8945d4 8b4dd4 83c102 }
            // n = 4, score = 200
            //   0302                 | add                 eax, dword ptr [edx]
            //   8945d4               | mov                 dword ptr [ebp - 0x2c], eax
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   83c102               | add                 ecx, 2

        $sequence_1 = { 0302 8945e8 8b4df8 8b55fc }
            // n = 4, score = 200
            //   0302                 | add                 eax, dword ptr [edx]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_2 = { 6a00 8b4584 50 e8???????? 83c408 894590 837d0800 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   8b4584               | mov                 eax, dword ptr [ebp - 0x7c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   894590               | mov                 dword ptr [ebp - 0x70], eax
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0

        $sequence_3 = { 0100 83c414 85c0 7502 }
            // n = 4, score = 200
            //   0100                 | add                 dword ptr [eax], eax
            //   83c414               | add                 esp, 0x14
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4

        $sequence_4 = { 0302 8945dc 8b45dc 83c002 }
            // n = 4, score = 200
            //   0302                 | add                 eax, dword ptr [edx]
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   83c002               | add                 eax, 2

        $sequence_5 = { 0100 0101 0001 0101 0001 0101 }
            // n = 6, score = 200
            //   0100                 | add                 dword ptr [eax], eax
            //   0101                 | add                 dword ptr [ecx], eax
            //   0001                 | add                 byte ptr [ecx], al
            //   0101                 | add                 dword ptr [ecx], eax
            //   0001                 | add                 byte ptr [ecx], al
            //   0101                 | add                 dword ptr [ecx], eax

        $sequence_6 = { 0301 8945e0 e8???????? 8b55e8 }
            // n = 4, score = 200
            //   0301                 | add                 eax, dword ptr [ecx]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   e8????????           |                     
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]

        $sequence_7 = { 0302 50 e8???????? 83c404 3b450c 750b 8b4df0 }
            // n = 7, score = 200
            //   0302                 | add                 eax, dword ptr [edx]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   3b450c               | cmp                 eax, dword ptr [ebp + 0xc]
            //   750b                 | jne                 0xd
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]

        $sequence_8 = { d0838b3f8d57 1c8d 8bae03000029 d1894a018d57 318d8bd20700 }
            // n = 5, score = 100
            //   d0838b3f8d57         | rol                 byte ptr [ebx + 0x578d3f8b], 1
            //   1c8d                 | sbb                 al, 0x8d
            //   8bae03000029         | mov                 ebp, dword ptr [esi + 0x29000003]
            //   d1894a018d57         | ror                 dword ptr [ecx + 0x578d014a], 1
            //   318d8bd20700         | xor                 dword ptr [ebp + 0x7d28b], ecx

        $sequence_9 = { 89442408 48 85c0 0f8409010000 41 c6042401 }
            // n = 6, score = 100
            //   89442408             | mov                 dword ptr [esp + 8], eax
            //   48                   | dec                 eax
            //   85c0                 | test                eax, eax
            //   0f8409010000         | je                  0x10f
            //   41                   | inc                 ecx
            //   c6042401             | mov                 byte ptr [esp], 1

        $sequence_10 = { 8f86b0000000 ff7108 8f86b4000000 31c0 48 5e }
            // n = 6, score = 100
            //   8f86b0000000         | pop                 dword ptr [esi + 0xb0]
            //   ff7108               | push                dword ptr [ecx + 8]
            //   8f86b4000000         | pop                 dword ptr [esi + 0xb4]
            //   31c0                 | xor                 eax, eax
            //   48                   | dec                 eax
            //   5e                   | pop                 esi

        $sequence_11 = { 6887000000 ed 713d 8907 }
            // n = 4, score = 100
            //   6887000000           | push                0x87
            //   ed                   | in                  eax, dx
            //   713d                 | jno                 0x3f
            //   8907                 | mov                 dword ptr [edi], eax

        $sequence_12 = { 50 ff15???????? ed 8408 ebe4 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ed                   | in                  eax, dx
            //   8408                 | test                byte ptr [eax], cl
            //   ebe4                 | jmp                 0xffffffe6

        $sequence_13 = { 8b450c 2580000000 83f800 741d }
            // n = 4, score = 100
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   2580000000           | and                 eax, 0x80
            //   83f800               | cmp                 eax, 0
            //   741d                 | je                  0x1f

        $sequence_14 = { 48 5e 5f 5b c9 c20400 b800000000 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   b800000000           | mov                 eax, 0

        $sequence_15 = { 31c0 40 59 5a c9 }
            // n = 5, score = 100
            //   31c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   59                   | pop                 ecx
            //   5a                   | pop                 edx
            //   c9                   | leave               

    condition:
        7 of them and filesize < 1761280
}