rule win_common_magic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.common_magic."
        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.common_magic"
        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 = { c645fc0c e8???????? 33c0 c78514ffffff00000000 8d4ddc c78524ffffff00000000 }
            // n = 6, score = 100
            //   c645fc0c             | mov                 byte ptr [ebp - 4], 0xc
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   c78514ffffff00000000     | mov    dword ptr [ebp - 0xec], 0
            //   8d4ddc               | lea                 ecx, [ebp - 0x24]
            //   c78524ffffff00000000     | mov    dword ptr [ebp - 0xdc], 0

        $sequence_1 = { 83c0fc 83f81f 7733 51 57 }
            // n = 5, score = 100
            //   83c0fc               | add                 eax, -4
            //   83f81f               | cmp                 eax, 0x1f
            //   7733                 | ja                  0x35
            //   51                   | push                ecx
            //   57                   | push                edi

        $sequence_2 = { 8b9d78ffffff 3bf3 0f84eb000000 66660f1f840000000000 8bbd0cffffff }
            // n = 5, score = 100
            //   8b9d78ffffff         | mov                 ebx, dword ptr [ebp - 0x88]
            //   3bf3                 | cmp                 esi, ebx
            //   0f84eb000000         | je                  0xf1
            //   66660f1f840000000000     | nop    word ptr [eax + eax]
            //   8bbd0cffffff         | mov                 edi, dword ptr [ebp - 0xf4]

        $sequence_3 = { 3bfb 7521 83bdc8feffff08 8d85b4feffff }
            // n = 4, score = 100
            //   3bfb                 | cmp                 edi, ebx
            //   7521                 | jne                 0x23
            //   83bdc8feffff08       | cmp                 dword ptr [ebp - 0x138], 8
            //   8d85b4feffff         | lea                 eax, [ebp - 0x14c]

        $sequence_4 = { 746e 8b4dfc 8d7823 8b55f8 83e7e0 }
            // n = 5, score = 100
            //   746e                 | je                  0x70
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d7823               | lea                 edi, [eax + 0x23]
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   83e7e0               | and                 edi, 0xffffffe0

        $sequence_5 = { 8d45c4 c745c45368656c 50 c745c86c33322e c745cc646c6c00 ff15???????? }
            // n = 6, score = 100
            //   8d45c4               | lea                 eax, [ebp - 0x3c]
            //   c745c45368656c       | mov                 dword ptr [ebp - 0x3c], 0x6c656853
            //   50                   | push                eax
            //   c745c86c33322e       | mov                 dword ptr [ebp - 0x38], 0x2e32336c
            //   c745cc646c6c00       | mov                 dword ptr [ebp - 0x34], 0x6c6c64
            //   ff15????????         |                     

        $sequence_6 = { 746e 8b4dfc 8d7823 8b55f8 83e7e0 8947fc eb19 }
            // n = 7, score = 100
            //   746e                 | je                  0x70
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d7823               | lea                 edi, [eax + 0x23]
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   83e7e0               | and                 edi, 0xffffffe0
            //   8947fc               | mov                 dword ptr [edi - 4], eax
            //   eb19                 | jmp                 0x1b

        $sequence_7 = { e8???????? c645fc0e 83c404 8b8db0feffff 83f908 7235 8b959cfeffff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c645fc0e             | mov                 byte ptr [ebp - 4], 0xe
            //   83c404               | add                 esp, 4
            //   8b8db0feffff         | mov                 ecx, dword ptr [ebp - 0x150]
            //   83f908               | cmp                 ecx, 8
            //   7235                 | jb                  0x37
            //   8b959cfeffff         | mov                 edx, dword ptr [ebp - 0x164]

        $sequence_8 = { 668b040e 663b01 7517 83c102 83ea01 75ef 8b45e8 }
            // n = 7, score = 100
            //   668b040e             | mov                 ax, word ptr [esi + ecx]
            //   663b01               | cmp                 ax, word ptr [ecx]
            //   7517                 | jne                 0x19
            //   83c102               | add                 ecx, 2
            //   83ea01               | sub                 edx, 1
            //   75ef                 | jne                 0xfffffff1
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]

        $sequence_9 = { 8d8068754100 8945e4 803800 8bc8 7435 8a4101 84c0 }
            // n = 7, score = 100
            //   8d8068754100         | lea                 eax, [eax + 0x417568]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   803800               | cmp                 byte ptr [eax], 0
            //   8bc8                 | mov                 ecx, eax
            //   7435                 | je                  0x37
            //   8a4101               | mov                 al, byte ptr [ecx + 1]
            //   84c0                 | test                al, al

    condition:
        7 of them and filesize < 212992
}