rule win_gibberish_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.gibberish."
        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.gibberish"
        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 = { 8d5e02 8bfa eb1b 3acd 7411 6a3f 59 }
            // n = 7, score = 100
            //   8d5e02               | lea                 ebx, [esi + 2]
            //   8bfa                 | mov                 edi, edx
            //   eb1b                 | jmp                 0x1d
            //   3acd                 | cmp                 cl, ch
            //   7411                 | je                  0x13
            //   6a3f                 | push                0x3f
            //   59                   | pop                 ecx

        $sequence_1 = { 330cc5e2a14700 314c2414 8b4c2424 c1e908 0fb6c3 c1eb08 8b0ccde3a14700 }
            // n = 7, score = 100
            //   330cc5e2a14700       | xor                 ecx, dword ptr [eax*8 + 0x47a1e2]
            //   314c2414             | xor                 dword ptr [esp + 0x14], ecx
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   c1e908               | shr                 ecx, 8
            //   0fb6c3               | movzx               eax, bl
            //   c1eb08               | shr                 ebx, 8
            //   8b0ccde3a14700       | mov                 ecx, dword ptr [ecx*8 + 0x47a1e3]

        $sequence_2 = { e9???????? 83e904 e9???????? 3b0d???????? f27502 }
            // n = 5, score = 100
            //   e9????????           |                     
            //   83e904               | sub                 ecx, 4
            //   e9????????           |                     
            //   3b0d????????         |                     
            //   f27502               | bnd jne             5

        $sequence_3 = { 0f849a000000 68???????? 8d85c4f9ffff 50 ff15???????? 85c0 7467 }
            // n = 7, score = 100
            //   0f849a000000         | je                  0xa0
            //   68????????           |                     
            //   8d85c4f9ffff         | lea                 eax, [ebp - 0x63c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7467                 | je                  0x69

        $sequence_4 = { 57 8d1c85d8b54700 8b03 90 8b15???????? 83cfff }
            // n = 6, score = 100
            //   57                   | push                edi
            //   8d1c85d8b54700       | lea                 ebx, [eax*4 + 0x47b5d8]
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   90                   | nop                 
            //   8b15????????         |                     
            //   83cfff               | or                  edi, 0xffffffff

        $sequence_5 = { ffd3 8b45d8 8d3446 33c0 83c602 663906 75c3 }
            // n = 7, score = 100
            //   ffd3                 | call                ebx
            //   8b45d8               | mov                 eax, dword ptr [ebp - 0x28]
            //   8d3446               | lea                 esi, [esi + eax*2]
            //   33c0                 | xor                 eax, eax
            //   83c602               | add                 esi, 2
            //   663906               | cmp                 word ptr [esi], ax
            //   75c3                 | jne                 0xffffffc5

        $sequence_6 = { 8bf8 59 85ff 7465 8b859cfeffff 6a00 }
            // n = 6, score = 100
            //   8bf8                 | mov                 edi, eax
            //   59                   | pop                 ecx
            //   85ff                 | test                edi, edi
            //   7465                 | je                  0x67
            //   8b859cfeffff         | mov                 eax, dword ptr [ebp - 0x164]
            //   6a00                 | push                0

        $sequence_7 = { 83ec0c a1???????? 33c5 8945fc 53 56 33db }
            // n = 7, score = 100
            //   83ec0c               | sub                 esp, 0xc
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   33db                 | xor                 ebx, ebx

        $sequence_8 = { 6a00 51 ff731c 8bcb c7432000000000 ff5014 }
            // n = 6, score = 100
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   ff731c               | push                dword ptr [ebx + 0x1c]
            //   8bcb                 | mov                 ecx, ebx
            //   c7432000000000       | mov                 dword ptr [ebx + 0x20], 0
            //   ff5014               | call                dword ptr [eax + 0x14]

        $sequence_9 = { 8d8da0feffff e8???????? 8d4de0 e8???????? 8d4dcc c745dcc4944500 e8???????? }
            // n = 7, score = 100
            //   8d8da0feffff         | lea                 ecx, [ebp - 0x160]
            //   e8????????           |                     
            //   8d4de0               | lea                 ecx, [ebp - 0x20]
            //   e8????????           |                     
            //   8d4dcc               | lea                 ecx, [ebp - 0x34]
            //   c745dcc4944500       | mov                 dword ptr [ebp - 0x24], 0x4594c4
            //   e8????????           |                     

    condition:
        7 of them and filesize < 1068032
}