rule win_redshawl_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 8b5c2420 448bc3 488d54246c 488d0d4f9f0000 e8???????? }
            // n = 5, score = 100
            //   8b5c2420             | mov                 dword ptr [ebp - 0x30], 0x6e72656b
            //   448bc3               | mov                 dword ptr [ebp - 0x2c], 0x32336c65
            //   488d54246c           | mov                 dword ptr [ebp - 0x28], 0x6c6c642e
            //   488d0d4f9f0000       | dec                 eax
            //   e8????????           |                     

        $sequence_1 = { baa00f0000 ffc6 488d0c80 488d05baaa0000 488d0cc8 }
            // n = 5, score = 100
            //   baa00f0000           | inc                 esp
            //   ffc6                 | mov                 dword ptr [esp + 0x44], edi
            //   488d0c80             | dec                 esp
            //   488d05baaa0000       | mov                 edi, dword ptr [esp + 0x60]
            //   488d0cc8             | dec                 eax

        $sequence_2 = { 33c0 eb22 488d542440 498bcc ff15???????? 85c0 0f8564ffffff }
            // n = 7, score = 100
            //   33c0                 | mov                 ebp, dword ptr [ebx]
            //   eb22                 | push                edi
            //   488d542440           | dec                 eax
            //   498bcc               | sub                 esp, 0x30
            //   ff15????????         |                     
            //   85c0                 | jne                 0xb05
            //   0f8564ffffff         | dec                 eax

        $sequence_3 = { ebc9 488bcb 488bc3 488d15eb7d0000 }
            // n = 4, score = 100
            //   ebc9                 | dec                 ecx
            //   488bcb               | mov                 edx, esp
            //   488bc3               | dec                 eax
            //   488d15eb7d0000       | mov                 ecx, ebp

        $sequence_4 = { 8a03 488d1501840000 ffc7 4a8b0ce2 4188440f4c 4a8b04e2 41c744075001000000 }
            // n = 7, score = 100
            //   8a03                 | arpl                cx, bx
            //   488d1501840000       | dec                 eax
            //   ffc7                 | lea                 ebp, [0x784b]
            //   4a8b0ce2             | dec                 eax
            //   4188440f4c           | sub                 esp, 0x20
            //   4a8b04e2             | mov                 ebx, ecx
            //   41c744075001000000     | dec    eax

        $sequence_5 = { 48ff25???????? 4883ec48 488364243000 8364242800 41b803000000 488d0d6c320000 4533c9 }
            // n = 7, score = 100
            //   48ff25????????       |                     
            //   4883ec48             | dec                 eax
            //   488364243000         | mov                 dword ptr [esp + 0x128], eax
            //   8364242800           | xor                 edx, edx
            //   41b803000000         | dec                 eax
            //   488d0d6c320000       | mov                 ecx, dword ptr [esp + 0x68]
            //   4533c9               | test                eax, eax

        $sequence_6 = { c744242800000000 488d85b8000000 4889442420 4533c9 448bc3 33d2 b900110000 }
            // n = 7, score = 100
            //   c744242800000000     | lea                 edx, [0xd361]
            //   488d85b8000000       | dec                 ecx
            //   4889442420           | mov                 eax, eax
            //   4533c9               | dec                 eax
            //   448bc3               | sar                 eax, 5
            //   33d2                 | and                 ecx, 0x1f
            //   b900110000           | dec                 eax

        $sequence_7 = { e9???????? 8bb424a0000000 448bc6 418bd4 488d0dee990000 e8???????? }
            // n = 6, score = 100
            //   e9????????           |                     
            //   8bb424a0000000       | je                  0x710
            //   448bc6               | dec                 eax
            //   418bd4               | mov                 ebx, edx
            //   488d0dee990000       | mov                 dword ptr [esp + 0x40], 0xffffffff
            //   e8????????           |                     

        $sequence_8 = { 488bd9 488d0575910000 488981a0000000 83611000 c7411c01000000 }
            // n = 5, score = 100
            //   488bd9               | dec                 eax
            //   488d0575910000       | lea                 ecx, [0x8073]
            //   488981a0000000       | dec                 esp
            //   83611000             | lea                 ebp, [0xc8b9]
            //   c7411c01000000       | mov                 ecx, ebx

        $sequence_9 = { 7457 33c0 48898424b8000000 4889442430 89442428 488d8424b8000000 }
            // n = 6, score = 100
            //   7457                 | mov                 dword ptr [esp + 0x350], eax
            //   33c0                 | dec                 eax
            //   48898424b8000000     | mov                 dword ptr [esp + 0x70], esp
            //   4889442430           | dec                 eax
            //   89442428             | mov                 edi, edx
            //   488d8424b8000000     | dec                 eax

    condition:
        7 of them and filesize < 174080
}