rule win_shapeshift_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.shapeshift."
        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.shapeshift"
        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 = { 8be5 5d c3 56 ff15???????? 33c0 5f }
            // n = 7, score = 100
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   56                   | push                esi
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi

        $sequence_1 = { 0f848e000000 a1???????? 8944243c a1???????? }
            // n = 4, score = 100
            //   0f848e000000         | je                  0x94
            //   a1????????           |                     
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   a1????????           |                     

        $sequence_2 = { b93b110f00 f7f1 68???????? 8915???????? e8???????? 83c404 8b35???????? }
            // n = 7, score = 100
            //   b93b110f00           | mov                 ecx, 0xf113b
            //   f7f1                 | div                 ecx
            //   68????????           |                     
            //   8915????????         |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b35????????         |                     

        $sequence_3 = { c644245300 e8???????? 83c40c 8d442450 68???????? }
            // n = 5, score = 100
            //   c644245300           | mov                 byte ptr [esp + 0x53], 0
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d442450             | lea                 eax, [esp + 0x50]
            //   68????????           |                     

        $sequence_4 = { 8b048538054200 0fb6440828 83e040 5d c3 e8???????? }
            // n = 6, score = 100
            //   8b048538054200       | mov                 eax, dword ptr [eax*4 + 0x420538]
            //   0fb6440828           | movzx               eax, byte ptr [eax + ecx + 0x28]
            //   83e040               | and                 eax, 0x40
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   e8????????           |                     

        $sequence_5 = { 884305 0fbf05???????? 0fb680589a4100 884306 }
            // n = 4, score = 100
            //   884305               | mov                 byte ptr [ebx + 5], al
            //   0fbf05????????       |                     
            //   0fb680589a4100       | movzx               eax, byte ptr [eax + 0x419a58]
            //   884306               | mov                 byte ptr [ebx + 6], al

        $sequence_6 = { ffd6 8b3d???????? 6a00 6a00 68f5000000 50 ffd7 }
            // n = 7, score = 100
            //   ffd6                 | call                esi
            //   8b3d????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68f5000000           | push                0xf5
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_7 = { ff15???????? 6a1c 8bf0 e8???????? 8bc8 0f57c0 83c404 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   6a1c                 | push                0x1c
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   0f57c0               | xorps               xmm0, xmm0
            //   83c404               | add                 esp, 4

    condition:
        7 of them and filesize < 303104
}