rule win_ployx_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.ployx."
        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.ployx"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 8d45c4 50 e8???????? 03d8 8d45f0 50 }
            // n = 6, score = 100
            //   8d45c4               | lea                 eax, [ebp - 0x3c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   03d8                 | add                 ebx, eax
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax

        $sequence_1 = { 80c120 8888c07a2700 eb1f 83f861 7213 }
            // n = 5, score = 100
            //   80c120               | add                 cl, 0x20
            //   8888c07a2700         | mov                 byte ptr [eax + 0x277ac0], cl
            //   eb1f                 | jmp                 0x21
            //   83f861               | cmp                 eax, 0x61
            //   7213                 | jb                  0x15

        $sequence_2 = { 8d859cfaffff 50 e8???????? 50 8d859cfaffff 50 8d0433 }
            // n = 7, score = 100
            //   8d859cfaffff         | lea                 eax, [ebp - 0x564]
            //   50                   | push                eax
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d859cfaffff         | lea                 eax, [ebp - 0x564]
            //   50                   | push                eax
            //   8d0433               | lea                 eax, [ebx + esi]

        $sequence_3 = { e8???????? eb4f 53 e8???????? 59 8365f800 833d????????00 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   eb4f                 | jmp                 0x51
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8365f800             | and                 dword ptr [ebp - 8], 0
            //   833d????????00       |                     

        $sequence_4 = { 8bfc f3a5 e8???????? 83c42c e9???????? }
            // n = 5, score = 100
            //   8bfc                 | mov                 edi, esp
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   e8????????           |                     
            //   83c42c               | add                 esp, 0x2c
            //   e9????????           |                     

        $sequence_5 = { ff55ec ff75f0 ff15???????? 8bf0 }
            // n = 4, score = 100
            //   ff55ec               | call                dword ptr [ebp - 0x14]
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_6 = { 68???????? 50 e8???????? 33c0 8d7dee ab }
            // n = 6, score = 100
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   8d7dee               | lea                 edi, [ebp - 0x12]
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_7 = { 85c0 747e 50 e8???????? 50 }
            // n = 5, score = 100
            //   85c0                 | test                eax, eax
            //   747e                 | je                  0x80
            //   50                   | push                eax
            //   e8????????           |                     
            //   50                   | push                eax

        $sequence_8 = { ff7518 e8???????? 59 50 ff7518 ff36 }
            // n = 6, score = 100
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   ff36                 | push                dword ptr [esi]

        $sequence_9 = { 7416 8088????????10 8a9405ecfdffff 8890c07a2700 eb1c }
            // n = 5, score = 100
            //   7416                 | je                  0x18
            //   8088????????10       |                     
            //   8a9405ecfdffff       | mov                 dl, byte ptr [ebp + eax - 0x214]
            //   8890c07a2700         | mov                 byte ptr [eax + 0x277ac0], dl
            //   eb1c                 | jmp                 0x1e

    condition:
        7 of them and filesize < 229376
}