rule win_racket_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.racket."
        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.racket"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 8b4020 5d c3 84c9 7908 8b4508 8b00 }
            // n = 7, score = 100
            //   8b4020               | mov                 eax, dword ptr [eax + 0x20]
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   84c9                 | test                cl, cl
            //   7908                 | jns                 0xa
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_1 = { ffd6 8d8db8f1ffff a3???????? e8???????? 50 53 }
            // n = 6, score = 100
            //   ffd6                 | call                esi
            //   8d8db8f1ffff         | lea                 ecx, [ebp - 0xe48]
            //   a3????????           |                     
            //   e8????????           |                     
            //   50                   | push                eax
            //   53                   | push                ebx

        $sequence_2 = { 8b4804 c1eb1f 80f301 894df8 7518 6a00 }
            // n = 6, score = 100
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   c1eb1f               | shr                 ebx, 0x1f
            //   80f301               | xor                 bl, 1
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   7518                 | jne                 0x1a
            //   6a00                 | push                0

        $sequence_3 = { 68???????? ffd6 85c0 0f95c0 884719 8d85f4fdffff 50 }
            // n = 7, score = 100
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   0f95c0               | setne               al
            //   884719               | mov                 byte ptr [edi + 0x19], al
            //   8d85f4fdffff         | lea                 eax, [ebp - 0x20c]
            //   50                   | push                eax

        $sequence_4 = { 74f1 56 ff7510 ff750c ff7508 }
            // n = 5, score = 100
            //   74f1                 | je                  0xfffffff3
            //   56                   | push                esi
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_5 = { 8845f8 8d45ac 0f1145d0 50 0f2805???????? }
            // n = 5, score = 100
            //   8845f8               | mov                 byte ptr [ebp - 8], al
            //   8d45ac               | lea                 eax, [ebp - 0x54]
            //   0f1145d0             | movups              xmmword ptr [ebp - 0x30], xmm0
            //   50                   | push                eax
            //   0f2805????????       |                     

        $sequence_6 = { 83c420 39450c 7c3c 6a00 6a00 6868080000 ff34b56cb30610 }
            // n = 7, score = 100
            //   83c420               | add                 esp, 0x20
            //   39450c               | cmp                 dword ptr [ebp + 0xc], eax
            //   7c3c                 | jl                  0x3e
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6868080000           | push                0x868
            //   ff34b56cb30610       | push                dword ptr [esi*4 + 0x1006b36c]

        $sequence_7 = { 8945a8 8b0d???????? 85c9 740d 6a00 6a01 e8???????? }
            // n = 7, score = 100
            //   8945a8               | mov                 dword ptr [ebp - 0x58], eax
            //   8b0d????????         |                     
            //   85c9                 | test                ecx, ecx
            //   740d                 | je                  0xf
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   e8????????           |                     

        $sequence_8 = { e8???????? 8d8db4f0ffff e8???????? 8d8db0efffff e8???????? 8d8decfeffff e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8d8db4f0ffff         | lea                 ecx, [ebp - 0xf4c]
            //   e8????????           |                     
            //   8d8db0efffff         | lea                 ecx, [ebp - 0x1050]
            //   e8????????           |                     
            //   8d8decfeffff         | lea                 ecx, [ebp - 0x114]
            //   e8????????           |                     

        $sequence_9 = { 2bcb 8955f0 c1f904 b8ffffff0f 8bd9 d1eb 2bc3 }
            // n = 7, score = 100
            //   2bcb                 | sub                 ecx, ebx
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   c1f904               | sar                 ecx, 4
            //   b8ffffff0f           | mov                 eax, 0xfffffff
            //   8bd9                 | mov                 ebx, ecx
            //   d1eb                 | shr                 ebx, 1
            //   2bc3                 | sub                 eax, ebx

    condition:
        7 of them and filesize < 985088
}