rule win_troldesh_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { f7430800400000 0f858b040000 8b45e4 897330 8bf3 894334 e8???????? }
            // n = 7, score = 600
            //   f7430800400000       | test                dword ptr [ebx + 8], 0x4000
            //   0f858b040000         | jne                 0x491
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   897330               | mov                 dword ptr [ebx + 0x30], esi
            //   8bf3                 | mov                 esi, ebx
            //   894334               | mov                 dword ptr [ebx + 0x34], eax
            //   e8????????           |                     

        $sequence_1 = { e8???????? 8b4608 8d443018 394610 721e 68???????? 53 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   8d443018             | lea                 eax, [eax + esi + 0x18]
            //   394610               | cmp                 dword ptr [esi + 0x10], eax
            //   721e                 | jb                  0x20
            //   68????????           |                     
            //   53                   | push                ebx

        $sequence_2 = { f783d800000000100000 7413 66837ddc17 7523 f783d800000000200000 7517 e8???????? }
            // n = 7, score = 600
            //   f783d800000000100000     | test    dword ptr [ebx + 0xd8], 0x1000
            //   7413                 | je                  0x15
            //   66837ddc17           | cmp                 word ptr [ebp - 0x24], 0x17
            //   7523                 | jne                 0x25
            //   f783d800000000200000     | test    dword ptr [ebx + 0xd8], 0x2000
            //   7517                 | jne                 0x19
            //   e8????????           |                     

        $sequence_3 = { ff15???????? 211e 59 219fc4040000 8b450c ff30 8db710040000 }
            // n = 7, score = 600
            //   ff15????????         |                     
            //   211e                 | and                 dword ptr [esi], ebx
            //   59                   | pop                 ecx
            //   219fc4040000         | and                 dword ptr [edi + 0x4c4], ebx
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   ff30                 | push                dword ptr [eax]
            //   8db710040000         | lea                 esi, [edi + 0x410]

        $sequence_4 = { ff7508 e8???????? 83c40c e9???????? 8b7518 e8???????? 8bce }
            // n = 7, score = 600
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   e9????????           |                     
            //   8b7518               | mov                 esi, dword ptr [ebp + 0x18]
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi

        $sequence_5 = { e8???????? 8b451c 53 56 8b30 85f6 7422 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8b451c               | mov                 eax, dword ptr [ebp + 0x1c]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   85f6                 | test                esi, esi
            //   7422                 | je                  0x24

        $sequence_6 = { e8???????? 83c40c e9???????? 33db ff750c 33c0 50 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   e9????????           |                     
            //   33db                 | xor                 ebx, ebx
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   33c0                 | xor                 eax, eax
            //   50                   | push                eax

        $sequence_7 = { eb06 8b3d???????? 8b07 8b0c98 8b5108 0355f0 8b410c }
            // n = 7, score = 600
            //   eb06                 | jmp                 8
            //   8b3d????????         |                     
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   8b0c98               | mov                 ecx, dword ptr [eax + ebx*4]
            //   8b5108               | mov                 edx, dword ptr [ecx + 8]
            //   0355f0               | add                 edx, dword ptr [ebp - 0x10]
            //   8b410c               | mov                 eax, dword ptr [ecx + 0xc]

        $sequence_8 = { f6461001 0f8598000000 8d7e70 6a14 5b 8bcf e8???????? }
            // n = 7, score = 600
            //   f6461001             | test                byte ptr [esi + 0x10], 1
            //   0f8598000000         | jne                 0x9e
            //   8d7e70               | lea                 edi, [esi + 0x70]
            //   6a14                 | push                0x14
            //   5b                   | pop                 ebx
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_9 = { e8???????? e8???????? e8???????? 85c0 0f85b3f9ffff 8b8730020000 3b8630020000 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f85b3f9ffff         | jne                 0xfffff9b9
            //   8b8730020000         | mov                 eax, dword ptr [edi + 0x230]
            //   3b8630020000         | cmp                 eax, dword ptr [esi + 0x230]

    condition:
        7 of them and filesize < 3915776
}