rule win_troldesh_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.troldesh."
        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.troldesh"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { f7d8 1bc0 40 89879c000000 c745f401000000 ff7518 e8???????? }
            // n = 7, score = 600
            //   f7d8                 | neg                 eax
            //   1bc0                 | sbb                 eax, eax
            //   40                   | inc                 eax
            //   89879c000000         | mov                 dword ptr [edi + 0x9c], eax
            //   c745f401000000       | mov                 dword ptr [ebp - 0xc], 1
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   e8????????           |                     

        $sequence_1 = { eb95 8d45e4 50 8d5d90 e8???????? 59 85c0 }
            // n = 7, score = 600
            //   eb95                 | jmp                 0xffffff97
            //   8d45e4               | lea                 eax, dword ptr [ebp - 0x1c]
            //   50                   | push                eax
            //   8d5d90               | lea                 ebx, dword ptr [ebp - 0x70]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax

        $sequence_2 = { e9???????? 33c0 33ff 397df4 0f94c0 8945f8 397df4 }
            // n = 7, score = 600
            //   e9????????           |                     
            //   33c0                 | xor                 eax, eax
            //   33ff                 | xor                 edi, edi
            //   397df4               | cmp                 dword ptr [ebp - 0xc], edi
            //   0f94c0               | sete                al
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   397df4               | cmp                 dword ptr [ebp - 0xc], edi

        $sequence_3 = { 8b4c2414 8bde e8???????? 56 e8???????? 59 8b4504 }
            // n = 7, score = 600
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   8bde                 | mov                 ebx, esi
            //   e8????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b4504               | mov                 eax, dword ptr [ebp + 4]

        $sequence_4 = { e9???????? f6c30e 0f84f5000000 0fb617 0fb65f01 c1e208 0bd3 }
            // n = 7, score = 600
            //   e9????????           |                     
            //   f6c30e               | test                bl, 0xe
            //   0f84f5000000         | je                  0xfb
            //   0fb617               | movzx               edx, byte ptr [edi]
            //   0fb65f01             | movzx               ebx, byte ptr [edi + 1]
            //   c1e208               | shl                 edx, 8
            //   0bd3                 | or                  edx, ebx

        $sequence_5 = { eb48 8b36 8b1e e8???????? 85c0 7507 68???????? }
            // n = 7, score = 600
            //   eb48                 | jmp                 0x4a
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   8b1e                 | mov                 ebx, dword ptr [esi]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   68????????           |                     

        $sequence_6 = { e8???????? dd05???????? dd1c24 ffb54cffffff 8d854cffffff 50 e8???????? }
            // n = 7, score = 600
            //   e8????????           |                     
            //   dd05????????         |                     
            //   dd1c24               | fstp                qword ptr [esp]
            //   ffb54cffffff         | push                dword ptr [ebp - 0xb4]
            //   8d854cffffff         | lea                 eax, dword ptr [ebp - 0xb4]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { e8???????? 8bf8 85ff 7426 8b4508 8d485c 51 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   7426                 | je                  0x28
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8d485c               | lea                 ecx, dword ptr [eax + 0x5c]
            //   51                   | push                ecx

        $sequence_8 = { 8d85f8fbffff 6a00 50 e8???????? 83c40c 56 8d85f0fdffff }
            // n = 7, score = 600
            //   8d85f8fbffff         | lea                 eax, dword ptr [ebp - 0x408]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   56                   | push                esi
            //   8d85f0fdffff         | lea                 eax, dword ptr [ebp - 0x210]

        $sequence_9 = { e8???????? 8b75e8 e8???????? 8b75e4 e8???????? 8b75e0 e8???????? }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8b75e8               | mov                 esi, dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   8b75e4               | mov                 esi, dword ptr [ebp - 0x1c]
            //   e8????????           |                     
            //   8b75e0               | mov                 esi, dword ptr [ebp - 0x20]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 3915776
}