rule win_cradlecore_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.cradlecore."
        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.cradlecore"
        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 = { c1f805 83e21f c1e206 031485f01f4300 eb02 }
            // n = 5, score = 100
            //   c1f805               | sar                 eax, 5
            //   83e21f               | and                 edx, 0x1f
            //   c1e206               | shl                 edx, 6
            //   031485f01f4300       | add                 edx, dword ptr [eax*4 + 0x431ff0]
            //   eb02                 | jmp                 4

        $sequence_1 = { c1f805 8bce 83e11f c1e106 8b0485f01f4300 c644080401 }
            // n = 6, score = 100
            //   c1f805               | sar                 eax, 5
            //   8bce                 | mov                 ecx, esi
            //   83e11f               | and                 ecx, 0x1f
            //   c1e106               | shl                 ecx, 6
            //   8b0485f01f4300       | mov                 eax, dword ptr [eax*4 + 0x431ff0]
            //   c644080401           | mov                 byte ptr [eax + ecx + 4], 1

        $sequence_2 = { 7c5a 7f04 85c9 7454 3bf8 7f10 7c04 }
            // n = 7, score = 100
            //   7c5a                 | jl                  0x5c
            //   7f04                 | jg                  6
            //   85c9                 | test                ecx, ecx
            //   7454                 | je                  0x56
            //   3bf8                 | cmp                 edi, eax
            //   7f10                 | jg                  0x12
            //   7c04                 | jl                  6

        $sequence_3 = { 32db 8d8dccfeffff 885def 57 e8???????? 8365fc00 83bd2cffffff00 }
            // n = 7, score = 100
            //   32db                 | xor                 bl, bl
            //   8d8dccfeffff         | lea                 ecx, [ebp - 0x134]
            //   885def               | mov                 byte ptr [ebp - 0x11], bl
            //   57                   | push                edi
            //   e8????????           |                     
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   83bd2cffffff00       | cmp                 dword ptr [ebp - 0xd4], 0

        $sequence_4 = { 2bc8 038de0efffff 8bc1 1395e4efffff e9???????? 8b95ecefffff 8b0495f01f4300 }
            // n = 7, score = 100
            //   2bc8                 | sub                 ecx, eax
            //   038de0efffff         | add                 ecx, dword ptr [ebp - 0x1020]
            //   8bc1                 | mov                 eax, ecx
            //   1395e4efffff         | adc                 edx, dword ptr [ebp - 0x101c]
            //   e9????????           |                     
            //   8b95ecefffff         | mov                 edx, dword ptr [ebp - 0x1014]
            //   8b0495f01f4300       | mov                 eax, dword ptr [edx*4 + 0x431ff0]

        $sequence_5 = { 8d8ed0020000 e8???????? 8d8ec0020000 e8???????? 53 57 }
            // n = 6, score = 100
            //   8d8ed0020000         | lea                 ecx, [esi + 0x2d0]
            //   e8????????           |                     
            //   8d8ec0020000         | lea                 ecx, [esi + 0x2c0]
            //   e8????????           |                     
            //   53                   | push                ebx
            //   57                   | push                edi

        $sequence_6 = { 59 6a63 668945c8 58 668945ce 6a6f 58 }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   6a63                 | push                0x63
            //   668945c8             | mov                 word ptr [ebp - 0x38], ax
            //   58                   | pop                 eax
            //   668945ce             | mov                 word ptr [ebp - 0x32], ax
            //   6a6f                 | push                0x6f
            //   58                   | pop                 eax

        $sequence_7 = { 8b11 ff5208 8bc6 8b4df4 64890d00000000 5e 8be5 }
            // n = 7, score = 100
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   ff5208               | call                dword ptr [edx + 8]
            //   8bc6                 | mov                 eax, esi
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp

        $sequence_8 = { e8???????? 6a00 53 8d4d98 c745e050504200 e8???????? 834dfcff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   8d4d98               | lea                 ecx, [ebp - 0x68]
            //   c745e050504200       | mov                 dword ptr [ebp - 0x20], 0x425050
            //   e8????????           |                     
            //   834dfcff             | or                  dword ptr [ebp - 4], 0xffffffff

        $sequence_9 = { 8a02 884435ec 46 8a6dee 42 8a4dec 8955dc }
            // n = 7, score = 100
            //   8a02                 | mov                 al, byte ptr [edx]
            //   884435ec             | mov                 byte ptr [ebp + esi - 0x14], al
            //   46                   | inc                 esi
            //   8a6dee               | mov                 ch, byte ptr [ebp - 0x12]
            //   42                   | inc                 edx
            //   8a4dec               | mov                 cl, byte ptr [ebp - 0x14]
            //   8955dc               | mov                 dword ptr [ebp - 0x24], edx

    condition:
        7 of them and filesize < 450560
}