rule win_boldmove_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.boldmove."
        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.boldmove"
        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 = { 83ec28 e8???????? 8d65f4 31c0 59 5b 5f }
            // n = 7, score = 100
            //   83ec28               | sub                 esp, 0x28
            //   e8????????           |                     
            //   8d65f4               | lea                 esp, [ebp - 0xc]
            //   31c0                 | xor                 eax, eax
            //   59                   | pop                 ecx
            //   5b                   | pop                 ebx
            //   5f                   | pop                 edi

        $sequence_1 = { c7442404ffff0000 891c24 ffd6 8d45d0 c745d001000000 83ec14 c744241004000000 }
            // n = 7, score = 100
            //   c7442404ffff0000     | mov                 dword ptr [esp + 4], 0xffff
            //   891c24               | mov                 dword ptr [esp], ebx
            //   ffd6                 | call                esi
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   c745d001000000       | mov                 dword ptr [ebp - 0x30], 1
            //   83ec14               | sub                 esp, 0x14
            //   c744241004000000     | mov                 dword ptr [esp + 0x10], 4

        $sequence_2 = { 89f7 8d7594 899558ffffff f3ab 8b8560ffffff 8d7b08 b904000000 }
            // n = 7, score = 100
            //   89f7                 | mov                 edi, esi
            //   8d7594               | lea                 esi, [ebp - 0x6c]
            //   899558ffffff         | mov                 dword ptr [ebp - 0xa8], edx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b8560ffffff         | mov                 eax, dword ptr [ebp - 0xa0]
            //   8d7b08               | lea                 edi, [ebx + 8]
            //   b904000000           | mov                 ecx, 4

        $sequence_3 = { 7504 c6040120 40 ebef 5d c3 55 }
            // n = 7, score = 100
            //   7504                 | jne                 6
            //   c6040120             | mov                 byte ptr [ecx + eax], 0x20
            //   40                   | inc                 eax
            //   ebef                 | jmp                 0xfffffff1
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_4 = { e8???????? 89c7 8b442460 897c2458 85c0 0f8547080000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   89c7                 | mov                 edi, eax
            //   8b442460             | mov                 eax, dword ptr [esp + 0x60]
            //   897c2458             | mov                 dword ptr [esp + 0x58], edi
            //   85c0                 | test                eax, eax
            //   0f8547080000         | jne                 0x84d

        $sequence_5 = { 81e700080000 0f842cfdffff c60630 83c601 3b75c8 0f851dfdffff 8b55c0 }
            // n = 7, score = 100
            //   81e700080000         | and                 edi, 0x800
            //   0f842cfdffff         | je                  0xfffffd32
            //   c60630               | mov                 byte ptr [esi], 0x30
            //   83c601               | add                 esi, 1
            //   3b75c8               | cmp                 esi, dword ptr [ebp - 0x38]
            //   0f851dfdffff         | jne                 0xfffffd23
            //   8b55c0               | mov                 edx, dword ptr [ebp - 0x40]

        $sequence_6 = { 89cb c1c207 8955d8 8b55e4 31ca 8b4dd4 c1c210 }
            // n = 7, score = 100
            //   89cb                 | mov                 ebx, ecx
            //   c1c207               | rol                 edx, 7
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx
            //   8b55e4               | mov                 edx, dword ptr [ebp - 0x1c]
            //   31ca                 | xor                 edx, ecx
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   c1c210               | rol                 edx, 0x10

        $sequence_7 = { c7042414000000 e8???????? b905000000 89c2 31c0 89d7 f3ab }
            // n = 7, score = 100
            //   c7042414000000       | mov                 dword ptr [esp], 0x14
            //   e8????????           |                     
            //   b905000000           | mov                 ecx, 5
            //   89c2                 | mov                 edx, eax
            //   31c0                 | xor                 eax, eax
            //   89d7                 | mov                 edi, edx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_8 = { 8b742470 dd442420 0344242c dc0cf5e0694100 83f835 8b742464 0f9ec0 }
            // n = 7, score = 100
            //   8b742470             | mov                 esi, dword ptr [esp + 0x70]
            //   dd442420             | fld                 qword ptr [esp + 0x20]
            //   0344242c             | add                 eax, dword ptr [esp + 0x2c]
            //   dc0cf5e0694100       | fmul                qword ptr [esi*8 + 0x4169e0]
            //   83f835               | cmp                 eax, 0x35
            //   8b742464             | mov                 esi, dword ptr [esp + 0x64]
            //   0f9ec0               | setle               al

        $sequence_9 = { 85ff 7439 8b45e4 897c2410 8944240c 8b4304 }
            // n = 6, score = 100
            //   85ff                 | test                edi, edi
            //   7439                 | je                  0x3b
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   8b4304               | mov                 eax, dword ptr [ebx + 4]

    condition:
        7 of them and filesize < 242688
}