rule win_cuegoe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.cuegoe."
        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.cuegoe"
        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 = { 8bf1 897534 8d4500 33ff 50 897dfc e8???????? }
            // n = 7, score = 200
            //   8bf1                 | mov                 esi, ecx
            //   897534               | mov                 dword ptr [ebp + 0x34], esi
            //   8d4500               | lea                 eax, [ebp]
            //   33ff                 | xor                 edi, edi
            //   50                   | push                eax
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   e8????????           |                     

        $sequence_1 = { 8b06 8b4004 c70406???????? c745fc04000000 8b06 8b4004 c70406???????? }
            // n = 7, score = 200
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   c70406????????       |                     
            //   c745fc04000000       | mov                 dword ptr [ebp - 4], 4
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   c70406????????       |                     

        $sequence_2 = { 39742460 740a ff742460 e8???????? 59 ff742454 89742464 }
            // n = 7, score = 200
            //   39742460             | cmp                 dword ptr [esp + 0x60], esi
            //   740a                 | je                  0xc
            //   ff742460             | push                dword ptr [esp + 0x60]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   ff742454             | push                dword ptr [esp + 0x54]
            //   89742464             | mov                 dword ptr [esp + 0x64], esi

        $sequence_3 = { 50 57 e8???????? 8b450c 894730 8b4544 89473c }
            // n = 7, score = 200
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   894730               | mov                 dword ptr [edi + 0x30], eax
            //   8b4544               | mov                 eax, dword ptr [ebp + 0x44]
            //   89473c               | mov                 dword ptr [edi + 0x3c], eax

        $sequence_4 = { 5f 8b4508 8903 8b450c 894304 8bc3 5e }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8903                 | mov                 dword ptr [ebx], eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   894304               | mov                 dword ptr [ebx + 4], eax
            //   8bc3                 | mov                 eax, ebx
            //   5e                   | pop                 esi

        $sequence_5 = { 8b80c8000000 c3 8bff 55 8bec 81ec28030000 }
            // n = 6, score = 200
            //   8b80c8000000         | mov                 eax, dword ptr [eax + 0xc8]
            //   c3                   | ret                 
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec28030000         | sub                 esp, 0x328

        $sequence_6 = { b8f8ffffff 5b 83c430 c21800 83fe04 7415 8d44240c }
            // n = 7, score = 200
            //   b8f8ffffff           | mov                 eax, 0xfffffff8
            //   5b                   | pop                 ebx
            //   83c430               | add                 esp, 0x30
            //   c21800               | ret                 0x18
            //   83fe04               | cmp                 esi, 4
            //   7415                 | je                  0x17
            //   8d44240c             | lea                 eax, [esp + 0xc]

        $sequence_7 = { 7467 3d00010000 7414 56 ff7510 8d7db0 ff751c }
            // n = 7, score = 200
            //   7467                 | je                  0x69
            //   3d00010000           | cmp                 eax, 0x100
            //   7414                 | je                  0x16
            //   56                   | push                esi
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d7db0               | lea                 edi, [ebp - 0x50]
            //   ff751c               | push                dword ptr [ebp + 0x1c]

        $sequence_8 = { 50 e8???????? 5e 5f 5b c9 c3 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 

        $sequence_9 = { 8b10 8955f8 85db 7614 52 ff75fc 8bc3 }
            // n = 7, score = 200
            //   8b10                 | mov                 edx, dword ptr [eax]
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   85db                 | test                ebx, ebx
            //   7614                 | jbe                 0x16
            //   52                   | push                edx
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   8bc3                 | mov                 eax, ebx

    condition:
        7 of them and filesize < 540672
}