rule win_redshawl_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.redshawl."
        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.redshawl"
        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 = { 90 e9???????? 488d542450 8bbc24b0000000 8bcf e8???????? }
            // n = 6, score = 100
            //   90                   | test                eax, eax
            //   e9????????           |                     
            //   488d542450           | je                  0x45a
            //   8bbc24b0000000       | dec                 eax
            //   8bcf                 | lea                 ecx, [0xd057]
            //   e8????????           |                     

        $sequence_1 = { 41b82c010000 488d4c2444 e8???????? 488d542440 498bcc }
            // n = 5, score = 100
            //   41b82c010000         | je                  0x73a
            //   488d4c2444           | jne                 0x75c
            //   e8????????           |                     
            //   488d542440           | je                  0x754
            //   498bcc               | dec                 eax

        $sequence_2 = { 488b542450 4885d2 7435 448bc6 498bcd e8???????? 8bd8 }
            // n = 7, score = 100
            //   488b542450           | mov                 edx, esi
            //   4885d2               | dec                 eax
            //   7435                 | lea                 ecx, [0x9863]
            //   448bc6               | dec                 eax
            //   498bcd               | mov                 edx, dword ptr [esp + 0x50]
            //   e8????????           |                     
            //   8bd8                 | nop                 

        $sequence_3 = { 488b4c2428 e8???????? 90 90 33c0 eb22 }
            // n = 6, score = 100
            //   488b4c2428           | inc                 ebp
            //   e8????????           |                     
            //   90                   | test                esp, esp
            //   90                   | dec                 ebp
            //   33c0                 | test                edi, edi
            //   eb22                 | je                  0x8f2

        $sequence_4 = { 4183cfff f6431840 4c8d0d9dbbffff 0f85a5000000 488bcb e8???????? }
            // n = 6, score = 100
            //   4183cfff             | mov                 edi, 0xa
            //   f6431840             | dec                 eax
            //   4c8d0d9dbbffff       | mov                 ecx, dword ptr [ebx]
            //   0f85a5000000         | dec                 eax
            //   488bcb               | mov                 dword ptr [ebx], eax
            //   e8????????           |                     

        $sequence_5 = { 488bf0 4885c0 0f8493010000 488d15d64c0000 488bc8 ff15???????? 4885c0 }
            // n = 7, score = 100
            //   488bf0               | mov                 dword ptr [ebp - 0x3c], 0x2e766e65
            //   4885c0               | mov                 dword ptr [ebp - 0x38], 0x6c6c64
            //   0f8493010000         | mov                 dword ptr [ebp - 0x50], 0x776c6873
            //   488d15d64c0000       | mov                 dword ptr [ebp - 0x4c], 0x2e697061
            //   488bc8               | mov                 dword ptr [ebp - 0x48], 0x6c6c64
            //   ff15????????         |                     
            //   4885c0               | mov                 dword ptr [ebp - 0x38], 0x6c6c64

        $sequence_6 = { 4889742420 e8???????? cc 4c8d05446d0000 498bd4 488bcd e8???????? }
            // n = 7, score = 100
            //   4889742420           | lea                 eax, [ecx + 0x58]
            //   e8????????           |                     
            //   cc                   | inc                 ecx
            //   4c8d05446d0000       | mov                 eax, 6
            //   498bd4               | dec                 eax
            //   488bcd               | lea                 edx, [0xc520]
            //   e8????????           |                     

        $sequence_7 = { e8???????? e9???????? 488b442450 488d0d73800000 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   e9????????           |                     
            //   488b442450           | dec                 esp
            //   488d0d73800000       | mov                 eax, dword ptr [esp + 0x68]

        $sequence_8 = { 90 90 eb67 85db 7457 33c0 }
            // n = 6, score = 100
            //   90                   | add                 esp, 0x20
            //   90                   | pop                 edi
            //   eb67                 | dec                 esp
            //   85db                 | mov                 eax, esi
            //   7457                 | mov                 edx, 0x2000000
            //   33c0                 | dec                 eax

        $sequence_9 = { 4863d1 488d0d90770000 488bc2 83e21f }
            // n = 4, score = 100
            //   4863d1               | dec                 eax
            //   488d0d90770000       | mov                 eax, dword ptr [esp + 0x50]
            //   488bc2               | dec                 eax
            //   83e21f               | lea                 ecx, [0x833b]

    condition:
        7 of them and filesize < 174080
}