rule win_flying_dutchman_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 50 8d8568feffff 50 ff15???????? 85c0 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   8d8568feffff         | lea                 eax, [ebp - 0x198]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_1 = { 48 0f84f8000000 48 0f853d010000 83bd44fcffff06 7553 8b35???????? }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   0f84f8000000         | je                  0xfe
            //   48                   | dec                 eax
            //   0f853d010000         | jne                 0x143
            //   83bd44fcffff06       | cmp                 dword ptr [ebp - 0x3bc], 6
            //   7553                 | jne                 0x55
            //   8b35????????         |                     

        $sequence_2 = { f7f1 40 8945f0 6bc0fd 01450c 837b1410 7204 }
            // n = 7, score = 100
            //   f7f1                 | div                 ecx
            //   40                   | inc                 eax
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   6bc0fd               | imul                eax, eax, -3
            //   01450c               | add                 dword ptr [ebp + 0xc], eax
            //   837b1410             | cmp                 dword ptr [ebx + 0x14], 0x10
            //   7204                 | jb                  6

        $sequence_3 = { 2503000080 7905 48 83c8fc 40 83f801 0f85d3000000 }
            // n = 7, score = 100
            //   2503000080           | and                 eax, 0x80000003
            //   7905                 | jns                 7
            //   48                   | dec                 eax
            //   83c8fc               | or                  eax, 0xfffffffc
            //   40                   | inc                 eax
            //   83f801               | cmp                 eax, 1
            //   0f85d3000000         | jne                 0xd9

        $sequence_4 = { 8d85f4fffeff 53 50 899df0fffeff e8???????? 83c40c 53 }
            // n = 7, score = 100
            //   8d85f4fffeff         | lea                 eax, [ebp - 0x1000c]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   899df0fffeff         | mov                 dword ptr [ebp - 0x10010], ebx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   53                   | push                ebx

        $sequence_5 = { eb60 6a59 ffd7 85c0 7458 b8???????? 8d9690010000 }
            // n = 7, score = 100
            //   eb60                 | jmp                 0x62
            //   6a59                 | push                0x59
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7458                 | je                  0x5a
            //   b8????????           |                     
            //   8d9690010000         | lea                 edx, [esi + 0x190]

        $sequence_6 = { 53 68d5af0000 ff750c e8???????? eb0a ff750c 8bc3 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   68d5af0000           | push                0xafd5
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   eb0a                 | jmp                 0xc
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8bc3                 | mov                 eax, ebx

        $sequence_7 = { 3bc7 7411 8938 897804 897808 89780c 897810 }
            // n = 7, score = 100
            //   3bc7                 | cmp                 eax, edi
            //   7411                 | je                  0x13
            //   8938                 | mov                 dword ptr [eax], edi
            //   897804               | mov                 dword ptr [eax + 4], edi
            //   897808               | mov                 dword ptr [eax + 8], edi
            //   89780c               | mov                 dword ptr [eax + 0xc], edi
            //   897810               | mov                 dword ptr [eax + 0x10], edi

        $sequence_8 = { 33f6 89852cffffff 395d08 0f8699000000 8d4702 898530ffffff }
            // n = 6, score = 100
            //   33f6                 | xor                 esi, esi
            //   89852cffffff         | mov                 dword ptr [ebp - 0xd4], eax
            //   395d08               | cmp                 dword ptr [ebp + 8], ebx
            //   0f8699000000         | jbe                 0x9f
            //   8d4702               | lea                 eax, [edi + 2]
            //   898530ffffff         | mov                 dword ptr [ebp - 0xd0], eax

        $sequence_9 = { ff248d3e540010 52 53 e8???????? e9???????? 52 53 }
            // n = 7, score = 100
            //   ff248d3e540010       | jmp                 dword ptr [ecx*4 + 0x1000543e]
            //   52                   | push                edx
            //   53                   | push                ebx
            //   e8????????           |                     
            //   e9????????           |                     
            //   52                   | push                edx
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 276480
}