rule win_snatchcrypto_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.snatchcrypto."
        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.snatchcrypto"
        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 = { 0f842e010000 488b542460 448d4301 488d4c2470 ff15???????? b920040000 41b806020000 }
            // n = 7, score = 200
            //   0f842e010000         | xor                 ecx, esp
            //   488b542460           | dec                 eax
            //   448d4301             | add                 esp, 0x578
            //   488d4c2470           | inc                 ecx
            //   ff15????????         |                     
            //   b920040000           | pop                 esi
            //   41b806020000         | inc                 ecx

        $sequence_1 = { 4c8b8fb0000000 488bcf 448bc0 4883feff 741b 488d155a570100 4889742420 }
            // n = 7, score = 200
            //   4c8b8fb0000000       | add                 ecx, dword ptr [ebx + 0x168]
            //   488bcf               | lea                 ebp, [ecx + eax + 6]
            //   448bc0               | mov                 edx, 0x4000
            //   4883feff             | xor                 ebx, ebx
            //   741b                 | mov                 eax, dword ptr [edi + 0x270]
            //   488d155a570100       | mov                 dword ptr [esp + 0xa0], ebx
            //   4889742420           | inc                 esp

        $sequence_2 = { 4885d2 750f 488d0d98ff0200 ff15???????? eb18 803a3c 488d0d2a5f0300 }
            // n = 7, score = 200
            //   4885d2               | inc                 ecx
            //   750f                 | push                esp
            //   488d0d98ff0200       | inc                 ecx
            //   ff15????????         |                     
            //   eb18                 | push                ebp
            //   803a3c               | dec                 eax
            //   488d0d2a5f0300       | lea                 ebp, [esp - 0x648]

        $sequence_3 = { 4053 4883ec20 488bd9 4881c128050000 488d15b1000300 4c8b4170 c7818c00000000000000 }
            // n = 7, score = 200
            //   4053                 | je                  0x136d
            //   4883ec20             | dec                 eax
            //   488bd9               | lea                 ecx, [0x2ba4b]
            //   4881c128050000       | dec                 eax
            //   488d15b1000300       | mov                 edi, eax
            //   4c8b4170             | dec                 eax
            //   c7818c00000000000000     | test    eax, eax

        $sequence_4 = { 488d159afe0200 e8???????? eb38 488d1574fe0200 4d8bcc e8???????? eb27 }
            // n = 7, score = 200
            //   488d159afe0200       | je                  0x852
            //   e8????????           |                     
            //   eb38                 | mov                 dword ptr [ebx + 0x58], ebp
            //   488d1574fe0200       | dec                 eax
            //   4d8bcc               | lea                 edx, [esp + 0x70]
            //   e8????????           |                     
            //   eb27                 | dec                 eax

        $sequence_5 = { 33db 4585e4 7467 0f1f4000 488b0d???????? 488bd6 e8???????? }
            // n = 7, score = 200
            //   33db                 | cmp                 ecx, eax
            //   4585e4               | je                  0x18b5
            //   7467                 | mov                 edi, 0xd
            //   0f1f4000             | mov                 ecx, edi
            //   488b0d????????       |                     
            //   488bd6               | dec                 eax
            //   e8????????           |                     

        $sequence_6 = { 4883ec10 8bb1f0000000 4d8bf0 488bf9 d1ee 83fe07 0f87a6050000 }
            // n = 7, score = 200
            //   4883ec10             | mov                 eax, 0xffffff74
            //   8bb1f0000000         | dec                 eax
            //   4d8bf0               | add                 esp, 0x20
            //   488bf9               | dec                 esp
            //   d1ee                 | lea                 eax, [esp + 0x40]
            //   83fe07               | jne                 0x102b
            //   0f87a6050000         | dec                 eax

        $sequence_7 = { 4885c0 0f8411ffffff 488b5348 488bc8 c743680a000000 e8???????? 8bf8 }
            // n = 7, score = 200
            //   4885c0               | inc                 ecx
            //   0f8411ffffff         | test                byte ptr [eax + 0x38], 0x7f
            //   488b5348             | jne                 0x476
            //   488bc8               | dec                 ebp
            //   c743680a000000       | add                 eax, ecx
            //   e8????????           |                     
            //   8bf8                 | inc                 ecx

        $sequence_8 = { 0f86d9000000 418bad90000000 418d5613 4803e8 488bcd ff5640 85c0 }
            // n = 7, score = 200
            //   0f86d9000000         | dec                 eax
            //   418bad90000000       | mov                 ecx, ebx
            //   418d5613             | test                eax, eax
            //   4803e8               | jne                 0xe72
            //   488bcd               | dec                 eax
            //   ff5640               | mov                 ecx, ebx
            //   85c0                 | dec                 eax

        $sequence_9 = { 4889542420 488d15eaef0100 488bcf e8???????? 8bc3 488b5c2450 488b742460 }
            // n = 7, score = 200
            //   4889542420           | jne                 0x150f
            //   488d15eaef0100       | nop                 word ptr [eax + eax]
            //   488bcf               | mov                 byte ptr [ecx], 0
            //   e8????????           |                     
            //   8bc3                 | dec                 eax
            //   488b5c2450           | inc                 ecx
            //   488b742460           | dec                 eax

    condition:
        7 of them and filesize < 1400832
}