rule win_rustyrocket_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.rustyrocket."
        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.rustyrocket"
        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 = { ff0408 488d4904 74f2 eb37 4d85c9 7432 488b16 }
            // n = 7, score = 100
            //   ff0408               | neg                 edx
            //   488d4904             | xor                 edx, 0x12fac4b
            //   74f2                 | add                 edx, 0xa7c3635b
            //   eb37                 | mov                 eax, edx
            //   4d85c9               | shr                 eax, 5
            //   7432                 | xor                 eax, edx
            //   488b16               | neg                 eax

        $sequence_1 = { f048ff08 0f8515020000 488b0d???????? 31d2 4989f8 ff15???????? e9???????? }
            // n = 7, score = 100
            //   f048ff08             | xor                 ebx, ebx
            //   0f8515020000         | dec                 esp
            //   488b0d????????       |                     
            //   31d2                 | mov                 esi, dword ptr [ecx + 0x48]
            //   4989f8               |                     
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_2 = { ffc5 39eb 0f83d1040000 4c8dbc24cc010000 4c8dac24c8010000 0f57f6 41be02000000 }
            // n = 7, score = 100
            //   ffc5                 | dec                 eax
            //   39eb                 | add                 eax, ecx
            //   0f83d1040000         | ret                 
            //   4c8dbc24cc010000     | imul                eax, edx, 0x75af44e
            //   4c8dac24c8010000     | xor                 eax, 0x3300e32e
            //   0f57f6               | mov                 edx, eax
            //   41be02000000         | inc                 edx

        $sequence_3 = { e8???????? 4885c0 756c 498b0e 488b7908 4531c0 4883ffff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4885c0               | mov                 dword ptr [eax + 0x10], ecx
            //   756c                 | dec                 eax
            //   498b0e               | test                eax, eax
            //   488b7908             | je                  0xe4
            //   4531c0               | dec                 eax
            //   4883ffff             | mov                 dword ptr [eax], edi

        $sequence_4 = { c3 b005 c3 56 57 53 4881ecd0010000 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   b005                 | ret                 
            //   c3                   | mov                 ax, 0x8b
            //   56                   | ret                 
            //   57                   | mov                 ax, 0x8c
            //   53                   | ret                 
            //   4881ecd0010000       | mov                 ax, 0x8d

        $sequence_5 = { b901000000 4c8d0512233000 4883f904 7434 448a0c08 458d51bf 4180fa1a }
            // n = 7, score = 100
            //   b901000000           | inc                 ebp
            //   4c8d0512233000       | xor                 esi, esi
            //   4883f904             | xorps               xmm6, xmm6
            //   7434                 | dec                 esp
            //   448a0c08             | lea                 edi, [esp + 0x20]
            //   458d51bf             | dec                 ebp
            //   4180fa1a             | mov                 ebp, dword ptr [esp + 0x40]

        $sequence_6 = { f0480fb111 740e 498b8ec0030000 488b4110 ff5020 488bbc2498040000 4883ff03 }
            // n = 7, score = 100
            //   f0480fb111           | dec                 eax
            //   740e                 | mov                 eax, dword ptr [ecx + 0x10]
            //   498b8ec0030000       | call                dword ptr [eax + 0x20]
            //   488b4110             | dec                 eax
            //   ff5020               | mov                 edi, dword ptr [esp + 0x498]
            //   488bbc2498040000     | dec                 eax
            //   4883ff03             | cmp                 edi, 3

        $sequence_7 = { f6806802000002 4889d8 74e4 4883bb90fdffff00 7420 488b8b98fdffff 488b93a0fdffff }
            // n = 7, score = 100
            //   f6806802000002       | mov                 dword ptr [ebx + 0x98], edi
            //   4889d8               | movups              xmmword ptr [ebx + 0xa0], xmm0
            //   74e4                 | dec                 eax
            //   4883bb90fdffff00     | movsd               dword ptr es:[edi], dword ptr [esi]
            //   7420                 | dec                 eax
            //   488b8b98fdffff       | mov                 dword ptr [esp + 0x1c10], eax
            //   488b93a0fdffff       | dec                 eax

        $sequence_8 = { e9???????? 66b9d900 e9???????? 66b9da00 e9???????? 66b9db00 e9???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   66b9d900             | lea                 eax, [0x194cc7]
            //   e9????????           |                     
            //   66b9da00             | jmp                 0x339
            //   e9????????           |                     
            //   66b9db00             | dec                 esp
            //   e9????????           |                     

        $sequence_9 = { ebe6 4c8d05472b1700 ebdd 4c8d057e2a1700 bac0020000 e8???????? 4c8d059d2a1700 }
            // n = 7, score = 100
            //   ebe6                 | jmp                 0x149
            //   4c8d05472b1700       | dec                 esp
            //   ebdd                 | lea                 eax, [0x16915b]
            //   4c8d057e2a1700       | jmp                 0x182
            //   bac0020000           | jmp                 0x1a2
            //   e8????????           |                     
            //   4c8d059d2a1700       | dec                 esp

    condition:
        7 of them and filesize < 6786048
}