rule win_gophe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.gophe."
        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.gophe"
        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 = { 833902 0f94c0 84c0 7407 e8???????? }
            // n = 5, score = 300
            //   833902               | cmp                 dword ptr [ecx], 2
            //   0f94c0               | sete                al
            //   84c0                 | test                al, al
            //   7407                 | je                  9
            //   e8????????           |                     

        $sequence_1 = { 68???????? 8bf8 e8???????? 83c408 8d5001 }
            // n = 5, score = 200
            //   68????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d5001               | lea                 edx, [eax + 1]

        $sequence_2 = { 7407 e8???????? eb06 e8???????? 90 488d8c24b8000000 }
            // n = 6, score = 200
            //   7407                 | je                  0x10
            //   e8????????           |                     
            //   eb06                 | dec                 eax
            //   e8????????           |                     
            //   90                   | lea                 edx, [esp + 0x24]
            //   488d8c24b8000000     | dec                 eax

        $sequence_3 = { 4c8d4c2440 4533c0 418d5001 ff9098000000 }
            // n = 4, score = 200
            //   4c8d4c2440           | dec                 eax
            //   4533c0               | lea                 edx, [esp + 0x24]
            //   418d5001             | dec                 eax
            //   ff9098000000         | mov                 ecx, eax

        $sequence_4 = { 740e 488d542424 488bc8 ff15???????? }
            // n = 4, score = 200
            //   740e                 | mov                 edx, dword ptr [edx + 0x10]
            //   488d542424           | cmp                 word ptr [edx], 0x1f
            //   488bc8               | je                  0x10
            //   ff15????????         |                     

        $sequence_5 = { 57 68???????? c70605000000 e8???????? }
            // n = 4, score = 200
            //   57                   | push                edi
            //   68????????           |                     
            //   c70605000000         | mov                 dword ptr [esi], 5
            //   e8????????           |                     

        $sequence_6 = { 4c8b4210 8b5208 ff9088000000 85c0 }
            // n = 4, score = 200
            //   4c8b4210             | dec                 esp
            //   8b5208               | mov                 eax, dword ptr [edx + 0x10]
            //   ff9088000000         | mov                 edx, dword ptr [edx + 8]
            //   85c0                 | call                dword ptr [eax + 0x88]

        $sequence_7 = { 7506 807e1000 7503 8a4e10 }
            // n = 4, score = 200
            //   7506                 | jne                 8
            //   807e1000             | cmp                 byte ptr [esi + 0x10], 0
            //   7503                 | jne                 5
            //   8a4e10               | mov                 cl, byte ptr [esi + 0x10]

        $sequence_8 = { 40 84c9 75f9 2bc2 897e08 }
            // n = 5, score = 200
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl
            //   75f9                 | jne                 0xfffffffb
            //   2bc2                 | sub                 eax, edx
            //   897e08               | mov                 dword ptr [esi + 8], edi

        $sequence_9 = { 6a00 50 68???????? 52 ff15???????? 8bf8 }
            // n = 6, score = 200
            //   6a00                 | push                0
            //   50                   | push                eax
            //   68????????           |                     
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_10 = { 6683793800 0f95842490000000 488b5210 66833a1f }
            // n = 4, score = 200
            //   6683793800           | test                eax, eax
            //   0f95842490000000     | cmp                 word ptr [ecx + 0x38], 0
            //   488b5210             | setne               byte ptr [esp + 0x90]
            //   66833a1f             | dec                 eax

        $sequence_11 = { 6830020000 6a00 56 e8???????? 83c40c c706ffffffff }
            // n = 6, score = 200
            //   6830020000           | push                0x230
            //   6a00                 | push                0
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c706ffffffff         | mov                 dword ptr [esi], 0xffffffff

        $sequence_12 = { 7417 4c8bc8 ba11010000 41b808000000 }
            // n = 4, score = 200
            //   7417                 | dec                 eax
            //   4c8bc8               | lea                 edx, [esp + 0x24]
            //   ba11010000           | dec                 eax
            //   41b808000000         | mov                 ecx, eax

        $sequence_13 = { 5d c3 e8???????? 8b4d10 }
            // n = 4, score = 200
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   e8????????           |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]

        $sequence_14 = { 55 4883ec30 488bea 488b4530 48c7401000000000 }
            // n = 5, score = 200
            //   55                   | lea                 ecx, [esp + 0x40]
            //   4883ec30             | inc                 ebp
            //   488bea               | xor                 eax, eax
            //   488b4530             | inc                 ecx
            //   48c7401000000000     | lea                 edx, [eax + 1]

        $sequence_15 = { 75f4 a1???????? 8907 6a20 }
            // n = 4, score = 200
            //   75f4                 | jne                 0xfffffff6
            //   a1????????           |                     
            //   8907                 | mov                 dword ptr [edi], eax
            //   6a20                 | push                0x20

    condition:
        7 of them and filesize < 1582080
}