rule win_pebbledash_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.pebbledash."
        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.pebbledash"
        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 = { 5e c3 55 8b6c2408 56 33f6 8b4d00 }
            // n = 7, score = 500
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8b6c2408             | mov                 ebp, dword ptr [esp + 8]
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   8b4d00               | mov                 ecx, dword ptr [ebp]

        $sequence_1 = { 832000 a1???????? a3???????? c3 8b442404 a3???????? }
            // n = 6, score = 500
            //   832000               | and                 dword ptr [eax], 0
            //   a1????????           |                     
            //   a3????????           |                     
            //   c3                   | ret                 
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   a3????????           |                     

        $sequence_2 = { 6829080000 68???????? 68???????? e8???????? 83c40c 68???????? }
            // n = 6, score = 500
            //   6829080000           | push                0x829
            //   68????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   68????????           |                     

        $sequence_3 = { 5e c3 55 8bec 833d????????00 750f }
            // n = 6, score = 500
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   833d????????00       |                     
            //   750f                 | jne                 0x11

        $sequence_4 = { e8???????? 33d2 b90e000000 f7f1 }
            // n = 4, score = 500
            //   e8????????           |                     
            //   33d2                 | xor                 edx, edx
            //   b90e000000           | mov                 ecx, 0xe
            //   f7f1                 | div                 ecx

        $sequence_5 = { 6888130000 ff15???????? b9???????? e8???????? 68???????? e8???????? 83c404 }
            // n = 7, score = 500
            //   6888130000           | push                0x1388
            //   ff15????????         |                     
            //   b9????????           |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_6 = { 8bc1 5b 5e 5f c9 c3 6a01 }
            // n = 7, score = 500
            //   8bc1                 | mov                 eax, ecx
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   c9                   | leave               
            //   c3                   | ret                 
            //   6a01                 | push                1

        $sequence_7 = { 50 b9???????? e8???????? 85c0 7514 }
            // n = 5, score = 500
            //   50                   | push                eax
            //   b9????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7514                 | jne                 0x16

        $sequence_8 = { 41894e04 0fb64209 0fb64a08 c1e108 0bc8 }
            // n = 5, score = 200
            //   41894e04             | mov                 eax, dword ptr [eax + 0x18]
            //   0fb64209             | dec                 eax
            //   0fb64a08             | mov                 ecx, dword ptr [eax]
            //   c1e108               | call                eax
            //   0bc8                 | test                eax, eax

        $sequence_9 = { e8???????? 498bcc 85c0 7512 }
            // n = 4, score = 200
            //   e8????????           |                     
            //   498bcc               | shl                 ecx, 8
            //   85c0                 | or                  ecx, eax
            //   7512                 | inc                 ecx

        $sequence_10 = { 33d2 41b800040000 4d8be1 e8???????? }
            // n = 4, score = 200
            //   33d2                 | shl                 ecx, 8
            //   41b800040000         | inc                 ecx
            //   4d8be1               | pop                 esi
            //   e8????????           |                     

        $sequence_11 = { 415d 415c 5d c3 498bcc e8???????? }
            // n = 6, score = 200
            //   415d                 | or                  ecx, eax
            //   415c                 | inc                 ecx
            //   5d                   | mov                 dword ptr [esi + 8], ecx
            //   c3                   | inc                 ecx
            //   498bcc               | pop                 ebp
            //   e8????????           |                     

        $sequence_12 = { 0fb63a 4c8d258fdaffff 440fb65a04 4d8be8 }
            // n = 4, score = 200
            //   0fb63a               | dec                 eax
            //   4c8d258fdaffff       | test                eax, eax
            //   440fb65a04           | je                  0xf
            //   4d8be8               | dec                 eax

        $sequence_13 = { 488bd3 e8???????? 0f100b 4883c310 }
            // n = 4, score = 200
            //   488bd3               | movzx               eax, byte ptr [edx + 2]
            //   e8????????           |                     
            //   0f100b               | inc                 ecx
            //   4883c310             | shl                 eax, 8

        $sequence_14 = { 0f44c5 41c1e008 8905???????? 0fb64201 440bc0 }
            // n = 5, score = 200
            //   0f44c5               | inc                 ecx
            //   41c1e008             | shl                 eax, 8
            //   8905????????         |                     
            //   0fb64201             | inc                 esp
            //   440bc0               | or                  eax, eax

        $sequence_15 = { e8???????? 488d542440 488bce ffd0 85c0 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   488d542440           | movzx               eax, byte ptr [edx + 1]
            //   488bce               | dec                 esp
            //   ffd0                 | lea                 esi, [ecx + 0x100]
            //   85c0                 | movzx               edi, byte ptr [edx]

    condition:
        7 of them and filesize < 677888
}