rule win_wslink_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.wslink."
        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.wslink"
        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 = { 4533e4 418bd4 85ed 746a 660f1f840000000000 498b08 4d8b13 }
            // n = 7, score = 100
            //   4533e4               | dec                 esp
            //   418bd4               | mov                 ebx, dword ptr [ebx + 0x10]
            //   85ed                 | dec                 esp
            //   746a                 | lea                 ecx, [0xa043f]
            //   660f1f840000000000     | mov    dword ptr [esp + 0x20], 0x70
            //   498b08               | lea                 ecx, [edx - 0x7c]
            //   4d8b13               | inc                 esp

        $sequence_1 = { 448d404c c7442420b5010000 e8???????? 33c0 e9???????? 48895c2440 4885c9 }
            // n = 7, score = 100
            //   448d404c             | mov                 dword ptr [esp + 0x20], ebp
            //   c7442420b5010000     | call                edi
            //   e8????????           |                     
            //   33c0                 | dec                 esp
            //   e9????????           |                     
            //   48895c2440           | lea                 eax, [0x665a8]
            //   4885c9               | dec                 esp

        $sequence_2 = { 8d5379 8d4b0e 448d4307 c7442420e0000000 e8???????? e9???????? 488d0d1eec0600 }
            // n = 7, score = 100
            //   8d5379               | mov                 dword ptr [esp + 0x20], ebp
            //   8d4b0e               | test                eax, eax
            //   448d4307             | je                  0xd86
            //   c7442420e0000000     | dec                 esp
            //   e8????????           |                     
            //   e9????????           |                     
            //   488d0d1eec0600       | mov                 eax, dword ptr [edi + 0x18]

        $sequence_3 = { 488b4108 49894708 488b4110 49894710 488b4118 49894718 498b0e }
            // n = 7, score = 100
            //   488b4108             | sub                 ecx, edi
            //   49894708             | dec                 esp
            //   488b4110             | sub                 edx, edi
            //   49894710             | dec                 eax
            //   488b4118             | mov                 ecx, edi
            //   49894718             | jle                 0xeb1
            //   498b0e               | nop                 dword ptr [eax + eax]

        $sequence_4 = { 7520 ba78000000 4c8d0dd6b70800 c7442420aa000000 8d4aaa 448d42c9 e8???????? }
            // n = 7, score = 100
            //   7520                 | dec                 eax
            //   ba78000000           | lea                 ecx, [esp + 0x48]
            //   4c8d0dd6b70800       | dec                 eax
            //   c7442420aa000000     | lea                 ecx, [ebp - 0x49]
            //   8d4aaa               | jne                 0xb1f
            //   448d42c9             | inc                 ecx
            //   e8????????           |                     

        $sequence_5 = { 75ed 85d2 0f84ccfdffff 4c8d053a5c0a00 488bc3 4c2bc3 }
            // n = 6, score = 100
            //   75ed                 | mov                 esp, eax
            //   85d2                 | dec                 eax
            //   0f84ccfdffff         | mov                 esi, edx
            //   4c8d053a5c0a00       | dec                 eax
            //   488bc3               | mov                 ebx, ecx
            //   4c2bc3               | dec                 eax

        $sequence_6 = { 488bc8 e8???????? 3db4000000 7f44 743c 2d81000000 83f80a }
            // n = 7, score = 100
            //   488bc8               | test                eax, eax
            //   e8????????           |                     
            //   3db4000000           | jne                 0xf9c
            //   7f44                 | mov                 dword ptr [esp + 0x20], 0x1a3
            //   743c                 | dec                 esp
            //   2d81000000           | lea                 ecx, [0x6f787]
            //   83f80a               | dec                 ecx

        $sequence_7 = { 4889742478 4a8d3429 7512 b864860000 66394604 7507 8b4638 }
            // n = 7, score = 100
            //   4889742478           | cmp                 dword ptr [ecx + 0x10], 0
            //   4a8d3429             | jne                 0x57f
            //   7512                 | jne                 0x590
            //   b864860000           | dec                 eax
            //   66394604             | lea                 edx, [0x6e4ce]
            //   7507                 | dec                 eax
            //   8b4638               | sub                 edx, ebx

        $sequence_8 = { 7d5e 488b4b08 4c8d052e950900 41b9af010000 e8???????? 4885c0 753f }
            // n = 7, score = 100
            //   7d5e                 | jbe                 0x167f
            //   488b4b08             | cmp                 eax, 0x10001
            //   4c8d052e950900       | je                  0x167f
            //   41b9af010000         | and                 eax, 0xf0007
            //   e8????????           |                     
            //   4885c0               | cmp                 eax, 6
            //   753f                 | jb                  0x16a4

        $sequence_9 = { 4c8bea 4c8be1 85ed 0f843d010000 410fb602 33d2 49ffc2 }
            // n = 7, score = 100
            //   4c8bea               | dec                 eax
            //   4c8be1               | lea                 ecx, [ebp - 0x41]
            //   85ed                 | inc                 ecx
            //   0f843d010000         | mov                 eax, 8
            //   410fb602             | dec                 eax
            //   33d2                 | lea                 edx, [ebp - 0x11]
            //   49ffc2               | dec                 eax

    condition:
        7 of them and filesize < 2007040
}