rule win_flying_dutchman_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.flying_dutchman."
        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.flying_dutchman"
        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???????? ff7510 8bd8 6a00 53 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8bd8                 | mov                 ebx, eax
            //   6a00                 | push                0
            //   53                   | push                ebx

        $sequence_1 = { 33f6 8b450c 8b4008 83c00c f7df 6a04 }
            // n = 6, score = 100
            //   33f6                 | xor                 esi, esi
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8b4008               | mov                 eax, dword ptr [eax + 8]
            //   83c00c               | add                 eax, 0xc
            //   f7df                 | neg                 edi
            //   6a04                 | push                4

        $sequence_2 = { 8db5b0fdffff e8???????? 6a01 8db578fdffff e8???????? 6a01 8db5ccfdffff }
            // n = 7, score = 100
            //   8db5b0fdffff         | lea                 esi, [ebp - 0x250]
            //   e8????????           |                     
            //   6a01                 | push                1
            //   8db578fdffff         | lea                 esi, [ebp - 0x288]
            //   e8????????           |                     
            //   6a01                 | push                1
            //   8db5ccfdffff         | lea                 esi, [ebp - 0x234]

        $sequence_3 = { 8d45f8 50 8b4304 56 bb24040000 03c3 }
            // n = 6, score = 100
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   8b4304               | mov                 eax, dword ptr [ebx + 4]
            //   56                   | push                esi
            //   bb24040000           | mov                 ebx, 0x424
            //   03c3                 | add                 eax, ebx

        $sequence_4 = { ff750c ff7508 ff36 ff15???????? 5d c20800 55 }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff36                 | push                dword ptr [esi]
            //   ff15????????         |                     
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8
            //   55                   | push                ebp

        $sequence_5 = { 03c0 50 ffb528fdffff 6a01 6a00 68???????? ffb524fdffff }
            // n = 7, score = 100
            //   03c0                 | add                 eax, eax
            //   50                   | push                eax
            //   ffb528fdffff         | push                dword ptr [ebp - 0x2d8]
            //   6a01                 | push                1
            //   6a00                 | push                0
            //   68????????           |                     
            //   ffb524fdffff         | push                dword ptr [ebp - 0x2dc]

        $sequence_6 = { 57 eb37 8d8524fdffff 50 8d8534ffffff 50 57 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   eb37                 | jmp                 0x39
            //   8d8524fdffff         | lea                 eax, [ebp - 0x2dc]
            //   50                   | push                eax
            //   8d8534ffffff         | lea                 eax, [ebp - 0xcc]
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_7 = { 668985e4fbffff 56 53 8d85e6fbffff 50 e8???????? 83c418 }
            // n = 7, score = 100
            //   668985e4fbffff       | mov                 word ptr [ebp - 0x41c], ax
            //   56                   | push                esi
            //   53                   | push                ebx
            //   8d85e6fbffff         | lea                 eax, [ebp - 0x41a]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18

        $sequence_8 = { 8b4604 53 57 8b3e 2bc7 b910020000 99 }
            // n = 7, score = 100
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   53                   | push                ebx
            //   57                   | push                edi
            //   8b3e                 | mov                 edi, dword ptr [esi]
            //   2bc7                 | sub                 eax, edi
            //   b910020000           | mov                 ecx, 0x210
            //   99                   | cdq                 

        $sequence_9 = { 3bc3 765a 50 8d442470 50 8d4c2458 e8???????? }
            // n = 7, score = 100
            //   3bc3                 | cmp                 eax, ebx
            //   765a                 | jbe                 0x5c
            //   50                   | push                eax
            //   8d442470             | lea                 eax, [esp + 0x70]
            //   50                   | push                eax
            //   8d4c2458             | lea                 ecx, [esp + 0x58]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 276480
}