rule win_gentlemen_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.gentlemen."
        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.gentlemen"
        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 = { e8???????? e8???????? 488d05a8550d00 bb1d000000 0f1f440000 e8???????? 90 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   e8????????           |                     
            //   488d05a8550d00       | mov                 dword ptr [ebx], esp
            //   bb1d000000           | dec                 ecx
            //   0f1f440000           | mov                 dword ptr [ebx + 8], eax
            //   e8????????           |                     
            //   90                   | dec                 ebp

        $sequence_1 = { e9???????? 488b8c2480010000 48894c2478 488d055b160100 31db e8???????? 48898424b0000000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   488b8c2480010000     | dec                 esp
            //   48894c2478           | mov                 ecx, dword ptr [esp + 0x160]
            //   488d055b160100       | mov                 eax, 1
            //   31db                 | xor                 eax, eax
            //   e8????????           |                     
            //   48898424b0000000     | nop                 

        $sequence_2 = { e8???????? 488b4c2408 6690 ebca 4885c0 740a 4883c060 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488b4c2408           | mov                 ecx, dword ptr [esp + 0x48]
            //   6690                 | dec                 eax
            //   ebca                 | mov                 dword ptr [esp + 0x60], eax
            //   4885c0               | dec                 eax
            //   740a                 | mov                 edx, dword ptr [esp + 0x88]
            //   4883c060             | dec                 eax

        $sequence_3 = { c3 807a0b00 7515 0f1f00 4885db 0f865c020000 80382b }
            // n = 7, score = 100
            //   c3                   | cmp                 ecx, 0x6c
            //   807a0b00             | jne                 0x120
            //   7515                 | dec                 eax
            //   0f1f00               | lea                 edx, [eax + 0x20]
            //   4885db               | dec                 eax
            //   0f865c020000         | lea                 esi, [ebx + 0x24]
            //   80382b               | mov                 edi, dword ptr [ebx + 4]

        $sequence_4 = { ba00010000 480f44fa 48897c2428 4889f8 48c1e003 488d0d52cd2d00 e8???????? }
            // n = 7, score = 100
            //   ba00010000           | dec                 eax
            //   480f44fa             | mov                 edi, dword ptr [esp + 0x68]
            //   48897c2428           | mov                 ecx, 1
            //   4889f8               | dec                 eax
            //   48c1e003             | mov                 eax, dword ptr [esp + 0x50]
            //   488d0d52cd2d00       | mov                 ebx, 2
            //   e8????????           |                     

        $sequence_5 = { e8???????? 498913 488b742440 488bbe88010000 49897b08 48899688010000 488b542438 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   498913               | mov                 ebx, 0x10
            //   488b742440           | nop                 
            //   488bbe88010000       | nop                 
            //   49897b08             | dec                 eax
            //   48899688010000       | mov                 dword ptr [esp + 8], eax
            //   488b542438           | dec                 eax

        $sequence_6 = { e8???????? 498913 488b30 49897308 488910 488d05a3ab0700 488b5c2420 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   498913               | dec                 eax
            //   488b30               | mov                 dword ptr [esp + 8], eax
            //   49897308             | dec                 eax
            //   488910               | mov                 dword ptr [esp + 0x10], ebx
            //   488d05a3ab0700       | dec                 eax
            //   488b5c2420           | mov                 dword ptr [esp + 0x18], ecx

        $sequence_7 = { e8???????? 4885c0 744c 4885c9 7510 488b15???????? 488b35???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4885c0               | nop                 
            //   744c                 | mov                 ecx, 0xffffffff
            //   4885c9               | dec                 eax
            //   7510                 | lea                 edx, [0x2cc493]
            //   488b15????????       |                     
            //   488b35????????       |                     

        $sequence_8 = { 0f1f8000000000 48896c24f0 488d6c24f0 e8???????? 488b6d00 488d8424b0040000 488d9c2490000000 }
            // n = 7, score = 100
            //   0f1f8000000000       | dec                 eax
            //   48896c24f0           | mov                 ebx, dword ptr [esp + 0x28]
            //   488d6c24f0           | dec                 eax
            //   e8????????           |                     
            //   488b6d00             | mov                 edx, ebx
            //   488d8424b0040000     | dec                 eax
            //   488d9c2490000000     | shl                 edx, 0xd

        $sequence_9 = { e8???????? 488b542460 4883ba3812000002 750e 4c8b442440 f04c0fc18228120000 41b801000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488b542460           | mov                 ecx, dword ptr [esp + 0x1e0]
            //   4883ba3812000002     | dec                 eax
            //   750e                 | mov                 edx, dword ptr [ecx + 0x10]
            //   4c8b442440           | dec                 eax
            //   f04c0fc18228120000     | mov    edx, eax
            //   41b801000000         | dec                 eax

    condition:
        7 of them and filesize < 6554624
}